CN117785073A - Internet of things device and time series data access method thereof and corresponding device and medium - Google Patents

Abstract

This application relates to an Internet of Things device and its sequential data access method and corresponding devices and media. The method includes: creating a storage block in a sector in the storage space, and the storage block includes multiple sequential data access methods. the storage location; update the sector information corresponding to the sector in the storage allocation information of the storage space, where the sector information includes timing range information; update the storage block in the storage allocation information of the storage space Corresponding block information, the block information includes timing addressing information; based on the storage allocation information, determine the starting timing position corresponding to the access target timing data, and start accessing each data of the target timing data unit. Using a single storage block to store multiple data units, and expressing the timing of the data units in the corresponding timing addressing information, can greatly improve the storage efficiency of the storage space, increase the information capacity of IoT devices, and reduce their costs. .

Description

Internet of Things equipment and its time series data access methods and corresponding devices and media

Technical field

The present application relates to the field of Internet of Things, and in particular to an Internet of Things device and its time series data access method and corresponding devices and media.

Background technique

The application of IoT devices is becoming more and more popular. IoT devices come in many forms and are widely used in personal consumption and household consumption, such as home heaters, warmers, various wearable devices, etc. These IoT devices are generally carried Various sensors need to collect various sensing data for a long time. The sensing data corresponding to each time sequence is composed of time series data according to the time sequence. Embedded chips are used to store and use these time series data.

Time series data refers to a set of data recorded in time order. Each set of data includes multiple data units corresponding to time series. The data content of each data unit is generally isomorphic. Time series data can be stored and managed through time series databases. In the embedded field, the commonly used storage medium is Flash memory, which adapts to the characteristics of flash memory. An embedded database that matches its characteristics is usually used to manage the storage space of flash memory. Different from traditional file system-based databases, this embedded database combines the characteristics of Flash, has strong performance and reliability, and can extend the service life of Flash as much as possible while ensuring extremely low resource usage.

Embedded databases based on Flash features usually provide two database modes: key-value database and time series database. A key-value database is a non-relational database that stores data as a collection of key-value pairs, where the key serves as a unique identifier. The key-value database is simple to operate and highly scalable. Time series database stores data in chronological order and manages time series data with timestamps. It has large data storage capacity and high insertion and query performance.

Although time series database technology can save and search time series data very well, each data unit, that is, each data point, needs to store a corresponding data header structure. Therefore, the data header structure occupies storage space and is different from the data unit. The total amount is positively correlated, and the loss is extremely high. In practice, the storage space of flash media used by IoT devices is generally not large. Under the constraints of limited storage space, in order to maximize the efficiency of time series data storage, existing time series data storage technology needs to be optimized.

Contents of the invention

The purpose of this application is to provide an Internet of Things device and its time series data access method and corresponding devices and media.

According to one aspect of this application, a time series data access method is provided, including:

Create a storage block in a sector in the storage space. The storage block includes a plurality of storage locations corresponding to time series, and is used to orderly store data units corresponding to each time series in the time series data;

Update the sector information corresponding to the sector in the storage allocation information of the storage space. The sector information includes timing range information, which is used to represent the timing composed of data units actually stored in each storage block of the sector. scope;

Update the block information corresponding to the storage block in the storage allocation information of the storage space, where the block information includes timing addressing information used to represent the timing of the data units actually stored in the storage block;

Based on the storage allocation information, a starting timing position corresponding to the access target timing data is determined, and each data unit of the target timing data is accessed starting from the starting timing position.

According to another aspect of the present application, a sequential data access device is provided, including:

Create an execution module, configured to create a storage block in a sector in the storage space. The storage block includes a plurality of storage locations corresponding to time series, and is used to orderly store data units corresponding to each time series in the time series data;

The sector update module is used to update the sector information corresponding to the sector in the storage allocation information of the storage space. The sector information includes timing range information and is used to represent the actual storage of each storage block in the sector. The timing range composed of data units;

A block update module, configured to update block information corresponding to the storage block in the storage allocation information of the storage space, wherein the block information includes timing addressing information for indicating the timing of the data unit actually stored in the storage block;

The data access module is configured to determine a starting timing position corresponding to the access target timing data based on the storage allocation information, and start accessing each data unit of the target timing data from the starting timing position.

According to another aspect of the present application, an Internet of Things device is provided, including a control unit and a flash memory medium. The control unit includes a central processor and a memory. The memory stores computer-readable instructions. The central processor obtains the The memory calls the computer readable instructions to execute the steps in the sequential data access method to determine storage allocation information of the storage space provided by the storage medium, so as to access the storage space according to the storage allocation information. Time series data.

According to another aspect of the present application, a non-volatile computer-readable storage medium is provided, which stores a computer program implemented according to the sequential data access method in the form of computer-readable instructions, and the computer program is When the computer calls the runtime, it executes the steps involved in the method.

Compared with the existing technology, this application has many technical advantages, including but not limited to the following aspects:

First, at the level of space planning for storage space, the storage space is divided into two levels. The entire storage space is first divided into sectors, and then the sectors are divided into storage blocks, corresponding to the structure of sectors and storage blocks. , providing corresponding storage allocation information, including sector information of each sector and block information corresponding to each storage block in each sector; at the level of timing planning of storage space, this application follows the timing Perform addressing management and provide multiple storage locations in each storage block to correspond to each data unit in the storage time series data, so that each data unit can determine its corresponding storage location. The storage location is represented by time series. For each storage block, a single block information is used to represent the timing addressing information of multiple data units in the storage block, without having to set a separate data header structure for each data unit. The sector of each sector The information also organizes the timing range of the data units stored in each storage block under its jurisdiction through timing range information. This enables unified planning of storage. On this basis, more efficient timing data can be achieved. access operations.

Secondly, the present application utilizes storage blocks with continuous storage locations to store multiple data units in the timing data. There is no need to set a data header structure for each data unit. Based on the characteristics that each data unit in the timing data has the same data structure and the same storage size, the storage block can use its timing addressing information to represent the timing of all data units in the storage block. Therefore, the timing addressing information only requires a very small number of bytes to represent the timing of each data unit in its storage block, which greatly saves storage overhead and significantly improves the storage efficiency of the storage space.

In addition, this application has the advantage of improving the storage efficiency of storage space, and can be applied to Internet of Things devices, so that Internet of Things devices can store time series data in a larger time series range based on flash memory media with limited storage space, improving the Internet of Things. The information capacity of the device reduces the cost of IoT devices.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of an exemplary sector storage space structure of this application;

FIG2 is a schematic diagram of a data structure of block information of an exemplary storage block of the present application;

Figure 3 is a schematic diagram of the data structure of sector information of an exemplary sector in this application;

Figure 4 is a schematic structural diagram of a computer device/Internet of Things device in an embodiment of the present application.

Figure 5 is a schematic flowchart of the time series data access method in the embodiment of the present application;

FIG. 6 is a schematic diagram of the structure of a timing data access device in an embodiment of the present application.

Detailed ways

The storage space of the present application can be provided by a flash memory medium. By implementing the time series data storage method of the present application as a time series database technology, corresponding data reading and writing services are provided for the time series data access operations to the storage space.

According to the time series database technology implemented in this application, the file system of the storage space divides the entire storage space into multiple sectors, and divides each sector into multiple storage blocks. Each sector can have a fixed space. Occupation, in the same way, each storage block can also have a fixed space occupation. Each storage block is used to store multiple data units organized in time series. Each data unit only needs to contain specific data without setting up an independent data header structure for it. The file system can describe the organizational structure of its storage space through storage allocation information. Accordingly, the sectors of this application can be organized according to the space structure shown in Figure 1. As can be seen from Figure 1, each sector consists of a sector header, that is, its sector information, and various storage blocks opened in an orderly manner. Each storage block includes its corresponding block information. After each block information is its corresponding storage block. Correspondingly, this application sets the storage allocation information to include sector information corresponding to each sector, and block information corresponding to each storage block in each sector. Although each storage block contains multiple A storage location is used to correspond to multiple data units in the storage time series data, but its corresponding block information is only set for a one-to-one correspondence between storage blocks.

Since the data units in time series data are generated according to time series, and each data unit is basically isomorphic and usually has the same storage size, the block information corresponding to each storage block can comprehensively represent its storage block. Timing addressing information corresponding to each data unit actually stored in this storage block. For example, in one embodiment, the earliest timestamp in each data unit actually stored in this storage block can be given in the timing addressing information. The earliest time stamp is the starting time sequence stored in this storage block, and then the storage data length of this storage block is determined according to the total amount of data units actually stored in it. Since the data size of each data unit is determined, Therefore, the storage data length actually gives the maximum timing offset corresponding to all data units actually stored in this storage block. Accordingly, the timing of this storage block can be formed from the earliest timestamp and the storage data length. Addressing information. It is easy to understand that based on the earliest timestamp and stepping with the stored data length as the end point, each data unit actually stored in this storage block can be traversed. Similarly, when a storage location needs to be determined in this storage block, the corresponding storage location can also be determined based on the timing offset of the storage location relative to the earliest timestamp, and the storage location can be read or written. Enter the data unit. Similarly, after the storage location corresponding to the storage data length, there is generally an empty storage location where no data unit has been written, and data units in the sequential data can be additionally written in the empty storage location.

As shown in Figure 2, this application exemplarily provides the data structure of a storage block. The data structure includes block information and corresponding storage blocks. The block information includes storage data length, reserved fields, and device status. , start timestamp, in which the block information is set corresponding to the storage data of the storage block, and actually constitutes the header structure of the storage block. The storage data length in the block information refers to the total amount of data units stored in the storage block; the reserved fields in the block information are optional and can be flexibly defined; the device status in the block information can be defined in certain Used in the embodiment, the corresponding device status identifier is written as needed to represent the device status of the IoT device corresponding to the stored time series data, for example, humidifier, heater and other IoT devices. The device status can be used to represent these Different gear states or abnormal states of the device can be used flexibly when using the device state. For example, different device states can be distinguished to store similar timing data of the same IoT device; the start timestamp in the block information is the corresponding The timestamp corresponding to the earliest data unit in the storage block, so it can also be called the earliest timestamp. It is easy to see from Figure 1 that the start timestamp can only occupy 4 bytes, and the storage data length can only occupy 2 bytes, a total of 6 bytes, so that each data unit in the stored data can be searched. The space occupied is extremely low. Compared with using the data header structure for indexing for each data unit, the indexing efficiency is extremely high.

In the storage allocation information, a corresponding sector information is provided for each sector. This sector information is mainly used to represent the timing range information occupied by all data units stored in each storage block within the corresponding sector. Usually It can be represented by a start timestamp and an end timestamp. In addition, richer related information can also be provided. For example, an exemplary data structure of sector information is shown in Figure 3. According to this example, the fields in the sector information include fields used to define timing. In addition to the start timestamp and end timestamp of the range information, it can also include sector status, reserved fields, total number of storage blocks, check codes, etc. The sector status in the sector information can be used to indicate the usage status of this sector. For example, 0xFF indicates that the sector is not initialized, 0x7F indicates that the sector is empty, 0x3F indicates that the sector is in use, and 0x1F indicates that the sector is full. In actual use, the sector status field can be maintained in time according to the sector usage. Reserved fields in sector information, which can be used flexibly as needed. The total number of storage blocks in the sector information indicates the offset of the last storage block relative to the starting address of the sector, so it can be used to assist in addressing. The checksum in the sector information can be used to determine whether all the data in this sector is normal. The start timestamp and end timestamp in the sector information respectively represent the timestamp of the first data unit synchronized with standard time and the timestamp of the last data unit synchronized with standard time under the standard time system. It can be seen that the sector information provides the time range information required to find the storage block. In addition, the total number of storage blocks also provides the information required for addressing. The latest storage block can be quickly located based on the total number of storage blocks, and whether any target storage block belongs to this sector can be determined based on the time range information.

In some embodiments, the storage allocation information can be used as the partition information of the flash memory medium. In other embodiments, the storage allocation information can also be used as the file storage structure in the file system, in which the sector information and storage of each sector The block information of the block and the storage data of the storage block can be stored as specific files in this file system. It can be seen that the specific application method of storing and allocating information in this application is flexible and does not affect the embodiment of the creative spirit of this application.

It is not difficult to understand that according to the above file system data structure of the present application, efficient time series data access operations can be performed in the storage space of the flash memory medium. The access referred to in the present application may refer to the storage of time series data or the reading of time series data. The flash memory medium of the present application can be used in an Internet of Things device to store the time series data collected by the Internet of Things device. Of course, the stored time series data can also be read from the flash memory medium. The time series data of the present application can be a sensor of an Internet of Things device, such as a temperature sensor, a humidity sensor, an acceleration sensor, a heart rate sensor, etc., and the time series data collected by any sensor. These time series data include each data unit collected by the same sensor according to the time series interval. For the same sensor, each of its data units has the same data structure, so it has the same storage size. The Internet of Things device of the present application can be a household appliance or a wearable device. The household appliance can be a heater, a warmer, etc., and the wearable device can be a smart watch, smart glasses, etc.

According to the above exemplary file system storage structure and working principle regarding storage space, the time series data access method of this application can be implemented as a computer program product and stored in the storage medium of the Internet of Things device as shown in Figure 4. The central processor in the control unit runs after being called from the memory, determines the timing data of the sensor at runtime, and performs access operations on the timing data in the storage space of the flash memory medium. Specifically, the storage space provided by the flash memory medium can be determined first. storage allocation information, and then accesses the timing data to the storage space according to the storage allocation information.

Please refer to Figure 5. In one embodiment, the sequential data access method of the present application is executed by the control unit, including:

Step S5100: Create a storage block in a sector in the storage space. The storage block includes a plurality of storage locations corresponding to time series, and is used to orderly store data units corresponding to each time series in the time series data;

Sectors and/or storage blocks may be created in the storage space of the present application as needed, and may be flexibly responded to various creation conditions, for example:

In some embodiments, a new storage block can be created under an existing sector under various creation conditions. Various creation conditions include, but are not limited to, any of the following: when a new sector is established, a storage block is created for it; when the storage capacity of the storage block to which the time series data is being stored is insufficient to write a data unit in the time series data, a new storage block can be created; when the time series data to be stored carries a device status identifier of an IoT device, and the device status identifier is different from the device status identifier stored in the block information of the currently located storage block, a new storage block can be created; when responding to a storage block creation instruction, a corresponding new storage block is created. And so on.

In some embodiments, a new sector may also be created first. The conditions for creating a new sector include but are not limited to any of the following: when formatting the storage space, initially creating at least one new sector; when the writing sequence is in progress. When the capacity of the current sector of data is insufficient, a new sector and a new storage block in it are created so that unwritten data units in the timing data can continue to be stored in the new storage block of the sector.

In this application, the storage capacity of the sectors and the storage blocks therein can be standardized in advance, so that the storage capacity of each sector is standardized according to a fixed value setting. Similarly, each storage area in the sector The storage capacity of a block can also be set to a fixed value to achieve standardization. Of course, since a sector can contain one or more storage blocks, its storage capacity is generally set according to a limited multiple of the storage capacity occupied by the storage block.

In one embodiment, each sector and each storage block is allowed to set its corresponding storage capacity as needed to provide a certain degree of flexibility for development. To this end, the sector information and storage block of the sector can be set. In the reserved field of the block information, write the maximum storage capacity of the corresponding sector and storage block. Subsequently, you can calculate whether the storage capacity occupied by the data units stored in the corresponding sector and storage block reaches the maximum storage capacity. The maximum storage capacity determines the remaining storage space of the corresponding sectors and storage blocks, so that a judgment can be made based on whether new sectors or new storage blocks need to be expanded.

As disclosed above, the storage block of this application includes multiple storage locations corresponding to time series. Each storage location corresponds to a data unit in the storage time series data. Therefore, this storage location is stored in the storage block based on The storage size of the data unit is determined. It is not difficult to understand that when the storage size of the data unit is larger, the limited storage capacity of the storage block can only accommodate a smaller number of data units. On the contrary, when the storage size of the data unit is larger, When the data unit is small, the limited storage capacity of the storage block can accommodate a larger number of data units. Therefore, the storage location is determined according to the deposit of the data unit. When the data unit stores the corresponding storage location, since the data unit itself is on time Sequential reading and writing, at this time, its storage location also corresponds to the timing of the data unit, that is to say, each storage location in the storage block, the data unit corresponding to each timing in the sequential storage of timing data, can be passed through the timing Changes to implement access operations to various storage locations.

When it is necessary to create a storage block of an existing sector in the storage space, it will involve updating the storage allocation information of the storage space. Please see the following for details.

Step S5200: Update the sector information corresponding to the sector in the storage allocation information of the storage space. The sector information includes timing range information, which is used to represent the data units actually stored in each storage block of the sector. The timing range of the composition;

Since new block information is added to the sector, it means that a corresponding storage block is created. In this case, the storage allocation information of the storage interval can be updated. Specifically, in the storage allocation information, the sector information of the sector to which the storage block belongs also needs to be updated accordingly. For example, in the sector information data structure shown in FIG. 3, since the newly created storage block becomes the last storage block, the total number of storage blocks therein needs to be updated accordingly to correspond to the newly created storage block.

As disclosed above, the sector information also includes timing range information. In the example of Figure 3, the timing range information includes a start timestamp and an end timestamp. These two fields need to be determined based on the timing range constituted by the data units actually stored in each storage block in this sector. Therefore, after the data units are subsequently stored in the newly added storage block, the end timestamp therein will be updated.

Step S5300: Update the block information corresponding to the storage block in the storage allocation information of the storage space. The block information includes timing addressing information used to represent the timing of the data units actually stored in the storage block. ;

Similarly, in the storage allocation information of the storage space, the block information corresponding to the storage block will be updated. Specifically, the block information corresponding to the storage block will be added. Since the block information is inserted and updated, so Each field shown in Figure 2 needs to be initialized. Since the block information is newly created, the operation of initializing each field is actually an operation of updating the block information. Each field of is updated to its initial value corresponding to initialization.

As disclosed previously, the block information also includes timing addressing information. In the example of Figure 2, the timing addressing information includes the start timestamp and the storage data length. The storage data length can be used to create the next storage block. It is updated only when the start timestamp indicates the timing corresponding to the first data unit actually stored in the storage block, and the storage data length indicates the total amount of data units actually stored in the storage block, and the storage size of the data unit is determined In fact, the timing addressing information of each data unit in this storage block is defined by storing the data length and the start timestamp. For example, by stepping within the storage data length range based on the start timestamp, Then each storage location in this storage block can be determined one by one, that is, the data units corresponding to each timing sequence can be determined, and access operations can be performed accordingly.

Step S5400: Based on the storage allocation information, determine the starting timing position corresponding to the access target timing data, and start accessing each data unit of the target timing data from the starting timing position.

After the creation of the storage block and the corresponding update of the storage allocation information are completed, the storage allocation information will contain the complete block information of the corresponding storage block. On this basis, when the target timing data needs to be accessed, the starting timing position can be determined according to the storage allocation information, and then the various data units of the target timing data can be accessed from the starting timing position.

In one embodiment, implementing an access operation may refer to implementing a storage operation, whereby, according to the storage allocation information, the latest storage block can be determined according to the total number of storage blocks in the sector information of the latest sector, and then, according to the start timestamp given in the block information of the latest storage block and its corresponding storage data length, the storage position where the data unit can be stored can be determined, and the storage position is used as the starting timing position, and each data unit in the target timing data is stored in the storage unit starting from the starting timing position. If the current storage block is not sufficient to store subsequent data units, the steps S5100 to S5300 of the present application can be continuously looped to continue to create a new storage block in the current sector; similarly, if the current sector is not sufficient to create a new storage block, as long as there is sufficient remaining space in the storage space, new sectors can continue to be created, and then new storage blocks can be created in the new sectors, and so on.

In another embodiment, performing an access operation may refer to performing a read operation. Accordingly, given the start timestamp and the end timestamp required for addressing the target time series data, it is possible to determine which sector the start timestamp and the end timestamp of the target time series data fall into based on the time range information defined by the start timestamp and the end timestamp in each sector information in the storage allocation information. Then, in the sector in which the target time series data falls, by identifying the start timestamp of each block information of the sector, the storage block corresponding to the start timestamp and the end timestamp of the target time series data can be quickly determined. Then, in the corresponding storage block, the start timestamp can be determined based on the start timestamp. The time stamp and the storage data length are used to address the start timestamp and the end timestamp of the target timing data, and determine their storage positions in the corresponding storage blocks, wherein the storage position in the storage block in the sector corresponding to the start timestamp of the target timing data is the starting timing position, and the storage position in the storage block in the sector corresponding to the end timestamp of the target timing data is the ending timing position. Based on this, data units are read in sequence from the starting timing position until the data units corresponding to the ending timing position. The data units corresponding to this timing span constitute the target timing data, thereby completing the reading of the target timing data.

It can be known from the above embodiments that this application has many technical advantages, including but not limited to the following aspects:

First, at the level of spatial planning of the storage space, the storage space is partitioned into two levels, the entire storage space is first divided into sectors, and then the sectors are divided into storage blocks. Corresponding to the structure of sectors and storage blocks, corresponding storage allocation information is provided, including sector information of each sector and block information corresponding to each storage block in each sector; at the level of timing planning of the storage space, the present application performs addressing management according to timing, and provides multiple storage locations in each storage block to correspond to each data unit in the storage timing data, so that each data unit can determine its corresponding storage location, and the storage location is represented by timing. For each storage block, a single block information is used to represent the timing addressing information of multiple data units in the storage block, without having to set a data header structure separately for each data unit. The sector information of each sector also organizes the timing range of the data units stored in each storage block under its jurisdiction through the timing range information, thereby realizing unified storage planning. On this basis, more efficient timing data access operations can be achieved.

Secondly, this application uses storage blocks with continuous storage locations to store multiple data units in the time series data. Each data unit does not need to set a data header structure. Based on the fact that each data unit in the time series data has the same data structure and the same storage Due to the characteristics of size, the storage block can represent the timing of all data units in the storage block through its timing addressing information. Therefore, the timing addressing information only requires a very small number of bytes to implement the timing of the storage area. The timing representation of each data unit in the block greatly saves storage overhead and greatly improves the storage efficiency of storage space.

In addition, this application has the advantage of improving the storage efficiency of storage space, and can be applied to Internet of Things devices, so that Internet of Things devices can store time series data in a larger time series range based on flash memory media with limited storage space, improving the Internet of Things. The information capacity of the device reduces the cost of IoT devices.

Based on any embodiment of the method of the present application, the time series data access method of the present application further includes:

Step S6100: Continuously synchronize the standard time to determine the timing of the data unit;

In this application, a parallel task is maintained in the background, and the parallel task implements time synchronization operations and synchronizes the standard time provided by the clock synchronization system to provide a timing reference for the access operations, especially storage operations, of this application. The clock synchronization system can be provided by a clock synchronization server in the cloud. The time synchronized from the clock synchronization system is used as the standard time.

Step S6200: When the synchronization of the standard time is successful, the standard time is used to update the timing addressing information of the storage block where the data unit in the target timing data is located;

When performing access operations to storage space, data units are usually read and written based on standard time. When the standard time is successfully synchronized, new sectors and storage blocks are created in the storage space. , or implement time-series data access operations, especially storage operations, on the corresponding storage block. After that, the time-series addressing information in the storage block can be updated according to the standard time.

In one embodiment, when creating a new storage block, a start timestamp needs to be written into the corresponding block information, and the start timestamp can be valued based on the standard time.

In another embodiment, when the existing sectors are insufficient to store the target timing data, a new sector will be created and a new storage block will be created in the newly created sector. Similarly, the sector information of the sector and the block of the storage block will be created. In the information, a start timestamp needs to be written, and there is an end timestamp in the sector information. These timestamps can be updated based on standard time. That is to say, the timing range in the sector information of the sector The timing addressing information in the information and block information of the storage block are set based on standard time by default.

Maintaining sector information and block information based on standard time can ensure the timing consistency of timing data in the storage space. Therefore, when it is necessary to find sectors, storage blocks, and data units in the storage space, the specific timing and storage location can be accurately located based on the standard time, so that the corresponding data unit can be accessed at the specified storage location.

Step S6300: When the synchronization of the standard time fails, create a new storage block to store the data unit of the target timing data, and use the system time to update the timing addressing information of the storage block.

Due to changes in network conditions or other possible reasons, synchronization of the standard time may also fail. In this case, the system time has to be used as the timing calculation baseline. The system time and the standard time belong to different time systems. Therefore, if you continue to set the target Storing timing data into the currently free storage block will cause the timing reference of the subsequently stored data unit to be inconsistent with the timing reference of the previously stored data unit, resulting in an error when addressing based on the timing addressing information. This situation Next, the solution in this embodiment is to additionally follow the process from step S5100 to step S5300 of this application to create a new storage block, and then use the system time as the time base to configure the start timestamp in the block information of the new storage block. , each data unit to be stored of the target time series data is stored in the new storage block in an orderly manner starting from the storage location pointed to by the start timestamp. Therefore, adapting to the situation where time synchronization fails and enabling system time can ensure that the time series recorded in system time and the time series recorded in standard time are distinguished from each other, avoiding data confusion caused by different time bases.

In order to facilitate the subsequent quick search of these storage blocks that are expressed in system time, these storage blocks can be marked as abnormal blocks. For example, a reserved field in the storage block can be written to indicate the timing abnormality. Corresponding identifiers, or separately established pointer information to these storage blocks, etc.

According to the above embodiments, it can be known that using the standard time as the time base for the timing data stored in the storage space can ensure that the timing of each data unit in the storage space is neat and reliable. When synchronization of the standard time fails, the system time is enabled as the time base. , create a new storage block to store the timing data after the synchronization standard time fails. The data units in these timing data can use the system time to represent their timing, which can play a role in disaster recovery and fault tolerance and ensure the timing of the two benchmarks. They have a certain degree of independence from each other to avoid data access errors and have stronger data security.

On the basis of any embodiment of the method of the present application, when synchronization with the standard time fails, a new storage block is created to store the data unit of the target time series data, and after the system time is used to update the timing addressing information of the storage block, the method includes:

Step S6500: When synchronizing to the latest standard time, determine the error value between the latest standard time and the current system time;

When the synchronization of the standard time fails and the system time is used as the timing basis to mark the timing of the timing data, if the synchronization of the standard time is continued and the latest standard time is successfully synchronized again, at this time, it can be triggered to check whether the storage space is There are memory blocks that are timed in system time so that the timed addressing information of these memory blocks can be modified into data in standard time. To this end, you can first calculate the error value between the latest standard time and the current system time. This error value represents the lag or advance of the system time relative to the standard time.

Step S6600: Detect and determine the timing addressing information expressed in system time in the storage allocation information;

The storage block whose timing is represented by system time has been marked in advance. For example, a mark corresponding to timing anomaly is added to the reserved field of its block information, or any other method can be used. In this case, According to the corresponding labels, in the storage allocation information, the block information of these storage blocks expressed in timing using system time can be quickly determined as the block information that needs timing correction in preparation for correcting the timing addressing information. .

Step S6700: Correct the system time in the timing addressing information to the standard time according to the error value.

For the timing addressing information of the storage block that needs timing correction, such as the start timestamp, by superimposing the start timestamp with the error value, the start timestamp originally expressed in system time can be modified to standard The start timestamp of the time representation, thereby modifying the storage block that expresses the timing in system time to the timing in standard time, so that each data unit of the storage block can be accessed based on standard time as the timing basis. Of course, if the reserved field of the corrected storage block was previously marked with an identifier corresponding to a timing anomaly, it needs to be restored to avoid subsequent misidentification.

According to the above embodiments, after the standard time synchronization fails, the timing of the timing data is represented by the system time to achieve disaster recovery and fault tolerance processing, and the timing data is temporarily stored in a new storage block. When the standard time is synchronized successfully again, the error between the system time and the standard time can be used to correct the timing addressing information in these storage blocks to represent the timing in standard time, thereby ensuring that all timing data can be unified to the same time base, so that all timing data in the storage space are neat, orderly, safe and reliable.

Based on any embodiment of the method of this application, before creating the storage block in the sector in the storage space, the following steps are included:

Step S4100: Read the check code carried in the sector information of each sector in the storage space, and check the corresponding sector according to the check code. When the check fails, the corresponding sector is regarded as an abnormal sector. When the verification is successful, it is regarded as a normal sector;

As shown in the structural diagram of sector information as shown in Figure 3, the sector information can be given a check code field to store the check code of the sector information. In this case, when necessary, it is usually a physical When the networking device is powered on, the data integrity of the sector can be verified.

To this end, each sector can be traversed from the storage allocation information to determine the sector information of each sector, extract the check code carried therein, and generate another check code for each data corresponding to the target field in the sector information according to the business logic corresponding to the generated check code. The two check codes are compared. When the two check codes are consistent, it indicates that the sector is a normal sector; when the check codes are inconsistent, it indicates that the sector is erroneous and is an abnormal sector.

Step S4200: For a normal sector, detect whether the timing range information in the sector information of the normal sector and the timing addressing information of the latest storage block are correct. If it is incorrect, check whether the timing range information in the sector information of the normal sector is correct. The timing of stored data units corrects the timing addressing information and the timing range information;

In the present application, the storage data length in the target storage block defaults to a specific identifier such as 0xFF. When the next storage block is created, the storage data length is updated according to the number of data units actually stored in the target storage block. If a storage block loses power during the process of writing timing data, the storage data length constituting the timing addressing information in the block information of the storage block may not be updated. In this case, not only will the timing addressing information be incorrect, but the timing range information in the corresponding normal sector will often be incorrect, which is mainly manifested in the incorrect end timestamp of the timing range information.

Accordingly, for a normal sector, the number of data units actually stored in the latest storage block in the normal sector, which is also the last storage block in the sequence, naturally corresponds to the number of these data units. The timing range covered is used to detect whether the timing range information in the sector information of the normal sector and the timing addressing information in the block information of the latest storage block are correct. When correct, it means that the timing range information in the normal sector is correct. The timing range information and the timing addressing information in the latest storage block are correct and do not need to be processed; otherwise, correspondingly, the timing range information in the normal sector and the timing addressing information in the latest storage block are incorrect. Corresponding corrections are required.

Accordingly, according to the number of data units actually stored in the latest storage block, that is, the total number of timings stored in the storage block, it can be used to update the storage data in the timing addressing information in the block information of the latest storage block. length, and based on this timing total, combined with the start timestamp in the timing addressing information of the latest storage block, the end timestamp of the entire normal sector can be determined, and the end timestamp is updated to the normal The corresponding field of the sector can be used to correct the timing range information of the normal sector.

Step S4300: Perform initialization processing on the abnormal sectors to restore their sector information to default initialization information.

After a sector is confirmed as an abnormal sector through verification, it can be initialized, reset the values of each field in its sector information, and restore the values of each field to the default initialization information.

It is easy to understand from the above embodiments that when the Internet of Things device is powered on, or at any other time when the security of the data in the flash memory medium needs to be detected, each sector of the storage space of the flash memory medium and the storage area therein can be checked. Block anomalies are checked to detect data anomalies in a timely manner and repair them accordingly, ensuring that the time series data stored therein has high security and reliability.

Based on any embodiment of the method of the present application, based on the storage allocation information, the starting timing position corresponding to the access target timing data is determined, and each of the target timing data is accessed starting from the starting timing position. Data units include:

Step S7100: Respond to the data storage instruction and use the time series data to be stored collected by the Internet of Things device as the target time series data;

When the access operation to the storage space of this application is a storage operation, the corresponding data storage instruction can be triggered by the Internet of Things device. In response to the instruction, the control unit can obtain the to-be-stored time series collected by the Internet of Things device through its sensor. Data, use this time series data to be stored as the target time series data corresponding to data access.

Step S7200: Determine the first free storage location in the latest storage block according to the storage allocation information as the starting timing position corresponding to the target timing data;

The storage of time series data in the storage space is stored in order according to the characteristics of the time series data. Therefore, when storing data in this embodiment, the scheduling rule adopted is to write the target time series data to be stored into the first free storage position of the latest storage block in the storage space. Accordingly, the sector with the latest start timestamp can be determined according to the sector information of each sector in the storage allocation information, and then the storage block with the latest start timestamp is determined as the latest storage block in each storage block under the sector. According to the timing addressing information of the latest storage block, that is, the start timestamp and the length of the stored data, the first free storage position in the latest storage block can be determined, and this free storage position is used as the starting timing position to write the target time series data.

Step S7300: Start storing each data unit of the target timing data in an orderly manner based on the starting timing position;

On the basis of determining the starting timing position, each data unit in the target timing data can be stored in the latest storage block in a manner that each data unit corresponds to a storage location. It is not difficult to understand that each data unit The unit occupies a corresponding time series. With the additional storage of data units in the target time series data, more and more space will be occupied by the storage block.

Step S7400: In the process of storing each data unit of the target timing data, detect whether the storage location of the storage block being stored is full. If it is full, create a new storage block to continue storing the data units of the target timing data, and update the timing addressing information of the full storage block according to the data units actually stored in the full storage block.

In the process of storing each data unit of the target time series data in the latest storage block, when each data unit is about to be written, it will be detected whether the remaining capacity of the current storage block is enough to store one data unit. If the capacity is sufficient, it can Directly write the data unit, otherwise, the storage capacity provided by the storage block is full and is not enough to store one data unit. In this case, it is necessary to create a new storage according to the process from step S5100 to step S5300 of this application. block, and then continue to store subsequent data units in the target time series data in the new storage block, and so on, until all data units in the target time series data are stored.

It should be pointed out that for each storage block in which storage operations are being performed, since sequential data is continuously written, for efficiency reasons, there is no need to update its sequential addressing when each data unit is written to it. Information, therefore, the scheduling principle adopted in this embodiment is that when the current storage block is full and a new storage block is created, the actual data of the current storage block will be calculated when a new storage block is created. The total amount of stored data units updates the stored data length in the timing addressing information of this storage block, thereby causing the block information of this storage block to represent accurate timing addressing information.

In some embodiments, after all storage operations of the target timing data are completed, the timing range information in the sector information of the sector to which the stored storage block belongs can be correspondingly updated. Specifically, the end timestamp thereof is usually updated.

Of course, if the power is cut off at this time, when the power is restored later, the reliability of the timing range information and timing addressing information can still be ensured by checking and repairing the sector information of the sector and the block information of the latest storage block according to the previous embodiments of this application.

According to the above embodiments, it is easy to understand that when the data access operation is a data storage operation, the present application determines the length of the stored data in the timing addressing information of the previous storage block only when a new storage block is created to avoid The timing addressing information is frequently modified in response to the writing of each data unit in the target timing data. Similarly, since only the starting timing position of the block information of the storage block is determined, continuous storage operations can be realized without corresponding Each data unit specifically determines its timing information, so the entire storage process can effectively reduce the frequency of operations and ensure that the storage process is more efficient and faster.

Based on any embodiment of the method of the present application, the time series data access method of the present application further includes:

Step S8100: Respond to the data storage instruction, obtain the time series data to be stored collected by the Internet of Things device as the target time series data, and obtain the device status identification of the Internet of Things device;

When the data access operation of this application is a data storage operation, in response to the corresponding data storage instruction, the control unit not only obtains the time series data to be stored collected by the sensor of the Internet of Things device as the target time series data to perform the data storage operation, You can also obtain the device status identifier of the IoT device. Depending on its value, this device status identifier can represent different working states of the IoT device, for example, working in different states corresponding to different gears, etc., in order to respond to different working states. Store timing data in different working states relatively independently to improve data scheduling efficiency.

Step S8200: Determine the target storage block corresponding to the target timing data for starting to store according to the storage allocation information;

Similar to the previous embodiment, for the target time series data to be stored, the latest storage block can be determined as the target storage block according to the storage allocation information. Please refer to the content disclosed in step S7200, which will not be repeated here.

Step S8300: Verify whether the device status identifier is consistent with the device status identifier in the block information of the target storage block. If they are inconsistent, create a new storage block to store the target timing data, and send the next storage block to the next storage block. The device status identifier is written in the block information of the storage block.

As shown in FIG2 , in the block information of the storage block of the present application, a device status field can be preset to store the device status identifier. In this case, the timing data with the same device status identifier can be stored in the same storage block, and the timing data with different device status identifiers can be stored in different storage blocks. According to this principle, it can be determined whether the device status identifier provided by the IoT device is consistent with the device status identifier recorded in the block information of the target storage block. When the two are consistent, the starting timing position corresponding to the storage target timing data can be determined in the target storage block in the manner disclosed in step S7200. Otherwise, a new storage block needs to be created for the target timing data to be written. This newly created storage block is an empty block, and the device status field in its block information can be written to the device status identifier provided by the IoT device. Then, starting from the first storage position in its storage block, each data unit in the target timing data is stored in each corresponding storage position. According to the process of steps S7300 to S7400 in the previous embodiment of the present application, the storage of the target timing data is completed.

According to the above embodiments, this application can solve the problem of distinguishing different device states of IoT devices and storing time series data in corresponding device states by adding a device status field in the block information, making it convenient to store time series data according to different device states of IoT devices. Call the corresponding time series data to avoid confusion in data management.

Based on any embodiment of the method of the present application, based on the storage allocation information, the starting timing position corresponding to the access target timing data is determined, and each of the target timing data is accessed starting from the starting timing position. Data units include:

Step S9100: Respond to the data reading instruction and determine the addressing and positioning information specified by the Internet of Things device. The addressing and positioning information includes a start timestamp and an end timestamp;

When the data access operation of this application is a data reading operation, the Internet of Things device will trigger the corresponding data reading instruction. In response to the instruction, the control unit can obtain the addressing and positioning information corresponding to the data reading instruction. For example, the addressing positioning information usually includes a start timestamp and an end timestamp, which means that in the process from the start timestamp to the end of the end timestamp, the data units corresponding to each time series are to be obtained as the target time series to be read. data.

In some embodiments, the end timestamp in the addressing positioning information can be defaulted, and the control unit uses the end timestamp in the sector information of the latest sector in the storage space as its default value, indicating that after reading the start timestamp All data units are used as target time series data.

Step S9200: Address according to the storage allocation information of the storage space, and determine the start timing position and the end timing position corresponding to the start timestamp and the end timestamp;

Accordingly, addressing can be performed based on the storage allocation information of the start timestamp and end timestamp in the storage space. The addressing of each timestamp is the same. Specifically, the start timestamp or end timestamp in the addressing location information will be addressed. Taking the timestamp as the target timestamp as an example, first determine the timing range to which the target timestamp belongs based on the timing range information defined by the start timestamp and end timestamp marked in the sector information of each sector in the storage allocation information. When the target timestamp falls within the timing range of a sector information, the sector to which the sector information belongs is the target sector that matches the target timestamp.

Then, in the block information corresponding to each storage block belonging to the target sector, based on the start timestamp in the timing addressing information recorded therein and the timing range defined by the storage data length providing timing offset information, It can be determined whether the target timestamp belongs to the timing range defined by the timing addressing information of the storage block. When it belongs to the timing range of a certain storage block, the storage block is the target storage block.

After determining the target storage block, the corresponding offset can naturally be determined based on the difference between the given target timestamp and the start timestamp in the target storage block. Thus, the storage position corresponding to the target timestamp in the target block can be located. If this storage position is determined based on the start timestamp given by the IoT device, it is the start timing position; if it is determined based on the end timestamp given by the IoT device, it is the end timing position.

It should be pointed out that the start timing position and the end timing position may belong to different storage blocks, or span multiple storage blocks, depending on the start timestamp and end timestamp given by the IoT device in the addressing and positioning information. It depends on the defined time span, but whether this time span is longer or shorter does not affect the embodiment of the creative spirit of this application.

Step S9300: Read data units starting from the start timing position until the data unit corresponding to the end timing position, and then construct the target timing data and return it to the Internet of Things device for calling.

After determining the start timing position and the end timing position corresponding to the target timing data that needs to be called, the data unit can be read from the start timing position until the data unit corresponding to the end timing position is read. All data units within the time span defined from the time series position to the end time series position constitute the target time series data that the IoT device needs to call, and are returned to the IoT device for use. The IoT device can then perform data mining and analysis based on these target time series data. Effect presentation, or uploading it to the cloud server for further processing, etc., can be used for richer extended applications.

According to the above embodiments, it can be seen that based on the standardized partition data structure implemented by the storage allocation of this application, when performing a data reading operation of time series data, it is only necessary to determine the corresponding starting timing position and ending timing based on the addressing and positioning information. position, the corresponding data unit in each storage block can be efficiently read as the target timing data that needs to be called. Since there is no need to compare the time information of each data unit, only the storage block where the data unit is located needs to be compared. Block information is addressed, so its data reading efficiency is higher.

By implementing this application, the storage efficiency of flash memory media can be significantly improved. Several exemplary analyzes are given below for reference:

Assume that in the case of continuous time storage, the storage space is 24 sectors (24*4096 bytes), data is saved every 10 minutes, the data length of the data unit is 30 bytes, and the results of the two storage solutions are tested respectively.

Using traditional time-series data storage technology, each data unit is set with a data header structure to mark its timestamp. Based on this, the calculation method is as follows:

A single sector can hold (4096 - 40)/(16 + 30) = 88 (rounded) data units.

24 sectors can store a total of 24 * 88 = 2112 data units.

Using the timing data storage technology of this application, the timing of each data unit is marked only by the timing addressing information in the block information of the storage block. The calculation method is as follows:

A single sector can hold (4096 - 16 - 8)/(30) = 135 (rounded) data points.

24 sectors can hold a total of 24 * 135 = 3240 data points.

Compared with traditional technology, this application increases the proportion of storable data units by (3240 - 2112)/2112= about 53%, which can store half more data than the original.

Assuming other conditions are the same, the data length of the data unit is reduced to 3 bytes, and the results of the two storage schemes are tested respectively.

Using traditional time series data storage technology, each data unit is set with a data header structure to mark its timestamp. Accordingly, the calculation method is as follows:

A single sector can hold (4096 - 40)/(16 + 3) = 225 (rounded) data points.

24 sectors can hold a total of 24 * 225 = 5400 data points.

Using the time series data storage technology of the present application, the time series of each data unit is marked only by the time series addressing information in the block information of the storage block, and the calculation method is as follows:

A single sector can hold (4096 - 16 - 8)/(3) = 1357 (rounded) data points.

24 sectors can hold a total of 24 * 1357 = 32568 data points.

The increased ratio is (32568 - 5400)/5400 = about 500%, which is 5 times more data than before. According to the above analysis, it can be seen that the technical effects achieved by this application are extremely significant.

Please refer to FIG. 6 , another embodiment of the present application further provides a timing data access device, which includes a creation execution module 5100, a sector update module 5200, a block update module 5300, and a data access module 5400, wherein the creation execution module 5100 is configured to create a storage block in a sector in a storage space, and the storage block includes a plurality of storage locations corresponding to timings, and is used to sequentially store data units corresponding to each timing in the timing data; the sector update module 5200 is a device for updating the sector information corresponding to the sector in the storage allocation information of the storage space, and the sector update module 5300 is configured to update ... The sector information includes timing range information, which is used to indicate the timing range constituted by the data units actually stored in each storage block of the sector; the block update module 5300 is configured to update the block information corresponding to the storage block in the storage allocation information of the storage space, and the block information includes timing addressing information, which is used to indicate the timing of the data units actually stored in the storage block; the data access module 5400 is configured to determine the starting timing position corresponding to the access target timing data based on the storage allocation information, and access each data unit of the target timing data starting from the starting timing position.

Based on any embodiment of the device of this application, the time series data access device of this application also includes: a time synchronization module, set to continuously synchronize the standard time, used to determine the timing of the data unit; a success processing module, set to When the synchronization of the standard time is successful, the standard time is used to update the timing addressing information of the storage block where the data unit in the target timing data is located; the failure processing module is configured to create a new storage block when the synchronization of the standard time fails. The data unit used to store the target timing data uses system time to update the timing addressing information of the storage block.

Based on any embodiment of the device of the present application, after the operation of the failure processing module, the time series data access device of the present application further includes: an error determination module, set to when synchronizing to the latest standard time, Determine the error value between the latest standard time and the current system time; the data troubleshooting module is configured to detect and determine the timing addressing information represented by system time in the storage allocation information; the data correction module is configured to determine the timing based on the error The value corrects the system time in the timing addressing information to the standard time.

Based on any embodiment of the device of the present application, prior to the operation of the creation execution module 5100, the sequential data access device of the present application further includes: a verification execution module configured to read each sector in the storage space. The check code carried in the sector information of the area is checked according to the check code. When the check fails, the corresponding sector is regarded as an abnormal sector. When the check succeeds, the corresponding sector is regarded as a normal sector. ; The normal response module is configured to detect whether the timing range information in the sector information of the normal sector and the timing addressing information of the latest storage block in the normal sector are correct. When it is incorrect, according to the latest storage The timing of the data unit actually stored in the block corrects the timing addressing information and the timing range information; the exception response module is configured to initialize the abnormal sector so that its sector information returns to the default initialization information.

Based on any embodiment of the device of the present application, the data access module 5400 includes: a storage response module configured to respond to data storage instructions and use the time series data to be stored collected by the Internet of Things device as the target time series data; The storage positioning module is configured to determine the first free storage location in the latest storage block according to the storage allocation information as the starting timing position corresponding to the target timing data; the storage execution module is configured to determine the starting timing position based on the starting timing position Begin to store each data unit of the target time series data in an orderly manner; the block switching module is configured to detect whether the storage location of the storage block being stored is full during the process of storing each data unit of the target time series data, When it is full, a new storage block is created to continue to store the data units of the target timing data, and the timing addressing information of the full storage block is updated according to the data units actually stored in the full storage block.

Based on any embodiment of the device of the present application, the time series data access device of the present application also includes: a response acquisition module configured to respond to the data storage instruction and obtain the time series data to be stored collected by the Internet of Things device as the target time series data, and obtain the device status identification of the Internet of Things device; the target determination module is configured to determine the target storage block corresponding to the target timing data for starting to store according to the storage allocation information; the status verification module is configured to verify Verify whether the device status identifier is consistent with the device status identifier in the block information of the target storage block. If they are inconsistent, create a new storage block to store the target timing data, and send the next storage block to the next storage block. The device status identifier is written in the block information.

Based on any embodiment of the device of the present application, the data access module 5400 includes: a read response module configured to respond to the data read instruction and determine the addressing and positioning information specified by the Internet of Things device. The addressing and positioning information includes a start timestamp and an end timestamp; the position determination module is configured to perform addressing according to the storage allocation information of the storage space, and determine the start timing position and the end timing position corresponding to the start timestamp and the end timestamp. ; The data calling module is configured to read the data unit starting from the starting timing position until the data unit corresponding to the ending timing position, forming the target timing data and returning it to the Internet of Things device for calling.

Based on any embodiment of the present application, please refer to Figure 4. Another embodiment of the present application also provides a computer device, which can be used as an Internet of Things device. As shown in Figure 4, the internal structure of the computer device Schematic diagram. The computer device includes a processor, a storage medium, a memory, a network interface and a sensor connected through a system bus. The processor is a central processing unit. The storage medium can be a non-volatile computer-readable storage medium such as a flash memory medium. The memory may be a memory component with higher access speed relative to the storage medium. Among them, the storage medium of the computer device stores an operating system, a database and a computer program encapsulating computer-readable instructions. The database can store a sequence of control information. When the computer-readable instructions are executed by the processor, the processor can implement a A time series data access method. There can be multiple storage media to store different types of data respectively. For example, a flash memory medium can be used as a special storage medium to store the time series data of this application. The processor of the computer device is used to provide computing and control capabilities to support the operation of the entire computer device. Computer readable instructions are stored in the memory of the computer device. These computer readable instructions can be loaded from the storage medium. When the computer readable instructions are executed by the processor, they can cause the processor to perform the sequential data access of the present application. method. The network interface of the computer device is used for communication with the terminal connection. The sensors of the computer equipment can continuously collect environmental data in time series, and use the environmental data of each time series as a data unit. Each data unit constitutes time series data and stores it in a storage medium. The sensor can be any sensor such as a temperature sensor or an acceleration sensor. Those skilled in the art can understand that the structure shown in Figure 4 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied. Specific computer equipment can May include more or fewer parts than shown, or combine certain parts, or have a different arrangement of parts.

In this embodiment, the processor is used to execute the specific functions of each module and its submodule in Figure 6, and the memory stores the program code and various data required to execute the above modules or submodules. The network interface is used to transmit data between user terminals or servers. The memory in this embodiment stores the program code and data required to execute all modules/submodules in the timing data access device of this application, and the server can call the program code and data of the server to execute the functions of all submodules.

This application also provides a non-volatile computer-readable storage medium, which stores a computer program encapsulating computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors Execute the steps of the sequential data access method described in any embodiment of this application.

The present application also provides a computer program product, which includes a computer program/instruction. When the computer program/instruction is executed by one or more processors, the steps of the sequential data access method described in any embodiment of the present application are implemented.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments of the present application can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage. In the medium, when the program is executed, it may include the processes of the above method embodiments. Among them, the aforementioned storage media can be computer-readable storage media such as magnetic disks, optical disks, read-only memory (Read-Only Memory, ROM), flash memory, or random access memory (Random Access Memory, RAM), etc.

The above are only some of the embodiments of the present application. It should be pointed out that those of ordinary skill in the technical field can also make several improvements and modifications without departing from the principles of the present application. These improvements and modifications can also be made. should be regarded as the scope of protection of this application.

To sum up, this application uses a single storage block to store multiple data units, and expresses the timing of the data units in the timing addressing information corresponding to the storage block, which can greatly improve the storage efficiency of the storage space, thereby improving The information capacity of IoT devices using this technology can also reduce the hardware cost of IoT devices.

Claims (10)

1. A method for accessing time-series data, comprising:

creating a storage block in a sector in a storage space, wherein the storage block comprises a plurality of storage positions corresponding to time sequences and is used for orderly storing data units corresponding to each time sequence in time sequence data;

updating sector information corresponding to the sector in storage allocation information of the storage space, wherein the sector information comprises time sequence range information used for representing a time sequence range formed by data units actually stored in each storage block of the sector;

Updating block information corresponding to the storage block in storage allocation information of the storage space, wherein the block information comprises time sequence addressing information used for representing the time sequence of a data unit actually stored in the storage block;

and determining a starting time sequence position corresponding to the access target time sequence data based on the storage allocation information, and starting to access each data unit of the target time sequence data from the starting time sequence position.

2. The method of claim 1, further comprising:

the continuous synchronization standard time is used for determining the time sequence of the data unit;

when the standard time is successful, the standard time is used for updating the time sequence addressing information of the storage block where the data unit in the target time sequence data is located;

when the synchronous standard time fails, a new storage block is created for storing the data unit of the target time sequence data, and the system time is used for updating the time sequence addressing information of the storage block.

3. The method of claim 2, wherein when the synchronization standard time fails, creating a memory block for storing the data unit of the target time sequence data, and using the system time for updating the time sequence address information of the memory block, comprises:

When synchronizing to the latest standard time, determining an error value between the latest standard time and the current system time;

detecting and determining time sequence addressing information expressed by system time in the storage allocation information;

and correcting the system time in the time sequence addressing information to be standard time according to the error value.

4. The method of claim 1, wherein prior to creating the memory blocks in the sectors in the memory space, comprising:

reading check codes carried in sector information of each sector in the storage space, checking the corresponding sector according to the check codes, wherein the corresponding sector is used as an abnormal sector when the check fails, and is used as a normal sector when the check succeeds;

for a normal sector, detecting whether the time sequence range information in the sector information of the normal sector and the time sequence addressing information of the latest storage block are correct or not, and when the time sequence addressing information and the time sequence range information are incorrect, correcting the time sequence addressing information and the time sequence range information according to the time sequence of a data unit actually stored in the latest storage block;

and initializing the abnormal sector to restore the sector information to default initialization information.

5. The method according to any one of claims 1 to 4, wherein determining a start timing position corresponding to access to target timing data based on the memory allocation information, starting from the start timing position to access each data unit of the target timing data, comprises:

responding to the data storage instruction, and taking the time sequence data to be stored, which is acquired by the Internet of things equipment, as target time sequence data;

determining a first vacant storage position in the latest storage block according to the storage allocation information, and taking the first vacant storage position as a starting time sequence position corresponding to the target time sequence data;

starting to orderly store each data unit of the target time sequence data based on the starting time sequence position;

and in the process of storing each data unit of the target time sequence data, detecting whether the storage position of the storage block being stored is full, when the storage position is full, creating a new storage block to continuously store the data unit of the target time sequence data, and updating the time sequence addressing information of the full storage block according to the data unit actually stored by the full storage block.

6. The method for accessing time-series data according to any one of claims 1 to 4, further comprising:

Responding to the data storage instruction, acquiring time sequence data to be stored, which is acquired by the Internet of things equipment, as target time sequence data, and acquiring equipment state identification of the Internet of things equipment;

determining a target storage block corresponding to the target time sequence data to start to be stored according to the storage allocation information;

checking whether the equipment state identifier is consistent with the equipment state identifier in the block information of the target storage block, and when the equipment state identifier is inconsistent with the equipment state identifier, creating a next storage block for storing the target time sequence data, and writing the equipment state identifier into the block information of the next storage block.

7. The method according to any one of claims 1 to 4, wherein determining a start timing position corresponding to access to target timing data based on the memory allocation information, starting from the start timing position to access each data unit of the target timing data, comprises:

responding to a data reading instruction, and determining addressing positioning information appointed by the Internet of things equipment, wherein the addressing positioning information comprises a start time stamp and an end time stamp;

addressing according to storage allocation information of the storage space, and determining a start time sequence position and an end time sequence position corresponding to the start time stamp and the end time stamp;

And starting to read the data unit from the starting time sequence position until the data unit corresponding to the ending time sequence position, and returning the target time sequence data to the Internet of things equipment for calling.

8. A time series data access device, comprising:

the system comprises a creation execution module, a storage module and a storage module, wherein the creation execution module is used for creating a storage block in a sector in a storage space, and the storage block comprises a plurality of storage positions corresponding to time sequences and is used for orderly storing data units corresponding to each time sequence in time sequence data;

the sector updating module is used for updating sector information corresponding to the sector in the storage allocation information of the storage space, wherein the sector information comprises time sequence range information which is used for representing the time sequence range formed by data units actually stored in each storage block of the sector;

the block updating module is configured to update block information corresponding to the storage block in storage allocation information of the storage space, wherein the block information comprises time sequence addressing information used for representing time sequence of a data unit actually stored in the storage block;

and the data access module is used for determining a starting time sequence position corresponding to the access target time sequence data based on the storage allocation information, and accessing each data unit of the target time sequence data from the starting time sequence position.

9. An internet of things device comprising a control unit and a flash memory medium, the control unit comprising a central processor and a memory, characterized in that the memory stores computer readable instructions, the central processor invoking the computer readable instructions from the memory to perform the steps in the time sequential data access method according to any of claims 1 to 7 to determine memory allocation information of a memory space provided by the memory medium to access time sequential data to the memory space according to the memory allocation information.

10. A non-transitory computer readable storage medium, characterized in that it stores a computer program in the form of computer readable instructions, which when invoked by a computer to run, performs the steps of the method according to any one of claims 1 to 7.