CN110309008B - Method and system for storing memory data in case of system abnormality - Google Patents

Abstract

The invention provides a method and a system for storing memory data in case of system abnormality, wherein the method comprises the steps of reserving an address space in a memory by configuration, and storing log buffer data and user application buffer data of an original system into the address space; switching the original system to a kdump system, mounting partitions of the original system by the kdump system, and respectively storing data in an address space to matched partitions in the original system; partitioning an original system, reserving a physical space, and reserving a cache space in a memory by configuration; writing first user data with valid flag bits in a physical space into a disk array; writing the second user data generated in real time into the cache space, and then writing the second user data into the disk array according to an optimization strategy; and switching the original system to a kdump system, storing the second user data into a physical space, and setting the flag bit of the second user data as effective. The invention can solve the problem of partial data loss in the memory when the system crashes, crashes or deadlocks occur.

Description

Method and system for storing memory data when system is abnormal

technical field

The invention relates to the technical field of data storage, in particular to a method and system for storing memory data when the system is abnormal.

Background technique

With the maturity of network technology and the development of Internet and cloud computing technology, computers are widely used. When the computer is running, due to program or calculation errors, there will be system crashes, downtime, deadlocks, etc. If it is restarted or shut down, memory data will be lost, which is not conducive to problem location and solution, but also causes data loss. huge loss. Linux provides the kdump function. When a system crash, downtime or deadlock occurs, it can switch to the kdump kernel to save the memory running status for analysis by engineers.

The existing technical scheme is the kdump module in the Linux source code. When Linux starts, a kdump kernel is run in memory. When the current Linux system crashes, crashes or deadlocks, it immediately switches to the kdump kernel, collects the memory running status, and saves for the vmcore file. This scheme mainly has the following disadvantages: first, when the system crashes, shuts down or deadlocks, the Linux system log is still recorded in the log buffer area, and is not saved in the messages file of the Linux system. Once restarted or shut down, the content in the cache will be lost lost. Second, kdump collects general information. If the data information generated by the user application remains in the memory, it will be lost once it is restarted or shut down. Third, when the user application writes data to the disk array, in order to improve the writing speed, the write cache will be used. Once the system crashes, crashes or deadlocks, restarts or shuts down, the user data in the write cache will be lost.

Contents of the invention

In view of this, the purpose of the present invention is to provide a method and system for storing memory data when the system is abnormal, so as to solve the problem of partial data loss in the memory when the system crashes, crashes or deadlocks.

In the first aspect, the embodiment of the present invention provides a method for saving memory data when the system is abnormal, which includes:

By configuring the original system, an address space is reserved in the memory, and the log buffer data and user application buffer data cached in the original system are stored in the address space;

Switching the original system to the kdump system, the kdump system mounts the partition of the original system, and based on the address space, saves the log buffer data and the user application buffer data to the original In the said partition that matches in the system;

Partitioning the original system, reserving physical space, and reserving cache space in memory by configuring the original system;

writing the first user data with valid flag bits in the physical space into the disk array;

After writing the second user data generated in real time into the cache space, write it into the disk array according to the optimization strategy;

Switching the original system to the kdump system, saving the second user data in the physical space, and setting the flag bit of the second user data to valid.

In combination with the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein, by configuring the original system, an address space is reserved in the memory, and the original system is cached The log buffer data and user application buffer data are stored in the address space, including:

By configuring the startup manager file grub.conf of the original system, the address space is reserved in memory;

Acquiring the structure of the log buffer of the original system and the structure of the user application data buffer;

In the case of a system exception, call the runtime panic function panic, and save the log buffer data to the address space through the structure of the log buffer;

And, saving the data in the user application buffer area to the address space through the structure of the user application data buffer area.

In combination with the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the switching of the original system to the kdump system, the kdump system mounts the partition of the original system, Based on the address space, saving the log buffer data and the user application buffer data to the matching partitions in the original system respectively, including:

Mapping the address space to obtain a memory virtual address that the original system has access to;

Switching the original system to the kdump system, the kdump system mounts the partition of the original system;

The data in the log buffer area and the data in the user application buffer area are read through the memory virtual address and stored in the matching partitions respectively.

In combination with the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the original system is partitioned, physical space is reserved, and by configuring the original system, Reserve cache space in memory, including:

Partitioning the original system, and reserving the matching physical space according to the cache size;

The cache space is reserved in memory by configuring the boot manager file grub.conf of the original system.

With reference to the first aspect, the embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein writing the first user data with valid flag bits in the physical space into the disk array includes:

Acquire the flag bit of the data recorded in the physical space through the user application;

judging whether the flag bit is valid;

If valid, verifying through the user application and writing the corresponding first user data into the disk array;

If invalid, no processing is performed.

With reference to the first aspect, this embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the switching the original system to the kdump system, and saving the second user data to the In the physical space, and setting the flag bit of the second user data to be valid, including:

In the case of a system exception, call the runtime panic function panic, and switch the original system to the kdump system;

Based on the kdump system, write the second user data in the cache space into the physical space, and set the flag bit of the second user data to valid.

In the second aspect, the embodiment of the present invention also provides a storage system for memory data when the system is abnormal, which includes:

The first reserved space unit is configured to reserve an address space in the memory by configuring the original system, and save the log buffer data and user application buffer data cached in the original system into the address space ;

The first data storage unit is configured to switch the original system to the kdump system, the kdump system mounts the partition of the original system, and caches the log buffer data and the user application based on the address space The zone data is respectively stored in the matching partitions in the original system;

The second reserved space unit is used to partition the original system, reserve physical space, and reserve cache space in memory by configuring the original system;

The first writing unit is configured to write the first user data with valid flag bits in the physical space into the disk array;

The second writing unit is configured to write the second user data generated in real time into the cache space, and then write it into the disk array according to an optimization strategy;

The second data saving unit is configured to switch the original system to the kdump system, save the second user data in the physical space, and set the flag bit of the second user data to valid.

With reference to the second aspect, the embodiment of the present invention provides a first possible implementation manner of the second aspect, wherein the first reserved space unit includes:

By configuring the grub.conf of the original system, the address space is reserved in memory to obtain the address space;

Acquiring the structure of the log buffer of the original system and the structure of the user application data buffer;

In the case of a system exception, call panic, and save the log buffer data to the address space through the structure of the log buffer;

And, saving the data in the user application buffer area to the address space through the structure of the user application data buffer area.

With reference to the second aspect, this embodiment of the present invention provides a second possible implementation manner of the second aspect, wherein the first data storage unit includes:

Mapping the address space to obtain a memory virtual address that the original system has access to;

Switching the original system to the kdump system, the kdump system mounts the partition of the original system;

The data in the log buffer area and the data in the user application buffer area are read through the memory virtual address and stored in the matching partitions respectively.

The embodiments of the present invention bring the following beneficial effects: the present invention provides a method and system for storing memory data when the system is abnormal, including: by configuring the original system, reserving an address space in the memory, and storing the data cached in the original system The log buffer data and user application buffer data are saved in the address space; the original system is switched to the kdump system, and the kdump system mounts the partition of the original system, and based on the address space, the log buffer data and user application buffer data are saved separately to the matching partition in the original system; partition the original system, reserve physical space, and reserve cache space in the memory by configuring the original system; write the first user data with valid flags in the physical space to Disk array; after writing the second user data generated in real time into the cache space, write it into the disk array according to the optimization strategy; switch the original system to the kdump system, save the second user data in the physical space, and save the second user data The flag bit is set to be valid. The invention can solve the problem of partial data loss in the internal memory when the system crashes, downtime or deadlock occurs.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a flowchart of a method for storing memory data when the system is abnormal provided by Embodiment 1 of the present invention;

2 is a flowchart of a method for saving messages information data when the system is abnormal provided by Embodiment 2 of the present invention;

3 is a flowchart of a method for saving user data when the system is abnormal provided by Embodiment 3 of the present invention;

FIG. 4 is a schematic diagram of a system for saving memory data when the system is abnormal according to Embodiment 4 of the present invention.

icon:

100-first reserved space unit; 200-first data storage unit; 300-second reserved space unit; 400-first writing unit; 500-second writing unit; 600-second data storage unit.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Currently, Linux provides the kdump function. When a system crash, downtime or deadlock occurs, it can switch to the kdump kernel to save the memory running status for engineers to analyze. However, this scheme mainly has the following disadvantages: first, when the system crashes, downtime or deadlocks, the Linux system log is still recorded in the log buffer area, and is not saved in the messages file of the Linux system. Content will be lost. Second, kdump collects general information. If the data information generated by the user application remains in the memory, it will be lost once it is restarted or shut down. Third, when the user application writes data to the disk array, in order to improve the writing speed, the write cache will be used. Once the system crashes, crashes or deadlocks, restarts or shuts down, the user data in the write cache will be lost.

Based on this, the method and system for storing memory data when the system is abnormal provided by the embodiments of the present invention can solve the problem of partial data loss in the memory when the system crashes, crashes or deadlocks occur.

In order to facilitate the understanding of this embodiment, firstly, the method for saving memory data when the system is abnormal disclosed in the embodiment of the present invention is introduced in detail.

Embodiment one:

FIG. 1 is a flowchart of a method for saving memory data when a system is abnormal according to Embodiment 1 of the present invention.

The solution provided by this embodiment is: when there is a system abnormality (including system crash, system downtime or system deadlock), collect and save the important data or information left in the memory by the system or user application, so that this part Data will not be lost due to system restart or shutdown. The data here is divided into two aspects: messages information data (system log messages or user data) that needs to be written into the Linux file system, and user data that needs to be written into the disk array.

As shown in Figure 1, the method for saving memory data when the system is abnormal is described, in which steps S110 to S120 are the implementation scheme for protecting the messages information data that needs to be written into the Linux file system, and steps S130 to S160 are for protecting the messages that need to be written. The implementation scheme of user data entering the disk array. The storage methods of memory data when the system is abnormal include:

Step S110, by configuring the original system (the original system is the Linux system), reserve the address space M in the memory, and save the log buffer data and user application buffer data cached in the original system to the address space M ;

Step S120, switching the original system to the kdump system, the kdump system mounts the partitions of the original system, and based on the address space M, saves the log buffer data and the user application buffer data to the matching partitions in the original system;

Step S130, partitioning the original system, reserving a physical space Z, and reserving a cache space N in memory by configuring the original system;

Step S140, writing the first user data whose flag bit is valid in the physical space Z into the disk array;

Step S150, after writing the second user data generated in real time into the cache space N, write it into the disk array according to the optimization strategy;

Step S160, switch the original system to the kdump system, save the second user data in the physical space Z, and set the flag bit of the second user data to valid. In addition, after the original system is restarted, steps S140 to S160 will be repeated, that is, the data flags in the physical space Z will be read repeatedly, and the data with valid flags will be written into the disk array, so that the data written in the cache can be guaranteed not lost.

It can be seen that, in the scheme provided by the foregoing embodiments, when a system crash, downtime or deadlock occurs in the Linux system, the memory data is protected through the following two aspects:

On the one hand, the address space M is reserved first in the memory. In the process of switching kdump when the system crashes, the following processing is added: first save the data in the messages buffer of the Linux system or the data in the residual buffer of the user application in the reserved In the address space M, after switching to the kdump system, mount the original system partition, and then write the data in the address space M into the matching messages of the original system or user applications of the original system.

On the other hand, the physical space Z is reserved in the original system partition, and the cache space N is reserved in the memory; in order to improve performance, user data is first written into the cache space N, and then written into the disk array with an optimized strategy. When a system crash occurs, switch to the kdump system, write the data in the cache space N into the physical space Z, and set the data flag to be valid. After the original system restarts, read the data flag recorded on the physical space Z, and if it is valid, write the data in the physical space Z to the disk array.

Embodiment two:

FIG. 2 is a flowchart of a method for saving messages information data when the system is abnormal according to Embodiment 2 of the present invention.

With reference to Fig. 2, when system abnormality takes place, the implementation plan of protecting the messages information data that needs to be written into the Linux file system includes the following steps, wherein, step S210～step S230 are to step S110 in the preservation method of internal memory data when system abnormality Expanded description, steps S240 to S260 are expanded descriptions of step S120.

Step S210, by configuring the grub.conf (boot manager file) of the original system, the address space M is reserved in the memory. Specifically, configure the grub.conf file in the original system, and reserve an address space M from the memory by configuring the memmap parameter. Then, enable the kdump function of the original system.

Step S220, acquiring the structure of the original system's log buffer and the structure of the user application data buffer. Specifically, obtain the structure of the address pointer, total length, start index, and end index of the original system log buffer area from the kernel, and obtain the structure of the address pointer and size of the user application data buffer area.

Step S230, in the case of a system exception, call panic (panic function at runtime), and save the log buffer data to the address space through the structure of the log buffer; and, save the data in the log buffer to the address space through the structure of the user application data buffer The user application buffer data is saved to the address space.

In step S240, the address space is mapped to obtain a memory virtual address that the original system has access rights to. Specifically, the start address of the reserved address space M is mapped to a memory virtual address accessible by the Linux system through the ioremap_nocache method.

In step S250, the original system is switched to the kdump system, and the kdump system mounts the partitions of the original system. Specifically, the log buffer data and user application buffer data are saved to the address space, and then the kdump system is switched by the Linux mechanism; after switching to the kdump system, the partition of the original system is mounted through the mount method.

Step S260, read the log buffer data and the user application buffer data through the memory virtual address and store them in matching partitions, such as the messages file of the original system partition or the user application data.

Embodiment three:

FIG. 3 is a flowchart of a method for saving user data when the system is abnormal according to Embodiment 3 of the present invention.

Referring to FIG. 3 , when a system abnormality occurs, the implementation plan for protecting user data that needs to be written into the disk array includes the following steps, wherein steps S310 to S320 are an expanded description of step S130 in the storage method for internal memory data when the system is abnormal , step S330 to step S350 are expanded descriptions of step S140, and steps S370 to step S380 are expanded descriptions to step S160.

Step S310, partitioning the original system, and reserving matching physical space according to the cache size;

Step S320, by configuring the grub.conf of the original system, reserve a cache space in the memory; that is, configure the grub.conf file of the original system, and reserve a space N from the memory as a data write cache by configuring the memmap parameter. Then, enable the kdump function of the original system.

Step S330, obtaining the flag bit of the data recorded in the physical space Z through the user application;

Step S340, judging whether the flag bit is valid; if valid, then execute step S350; if invalid, then do not process, and enter step S360;

Step S350, verifying through the user application and writing the corresponding first user data into the disk array;

Step S360, after writing the second user data generated in real time into the cache space, write it into the disk array according to the optimization strategy;

Step S370, in the case of a system abnormality, call panic, and switch the original system to the kdump system;

Step S380, based on the kdump system, write the second user data in the cache space N into the physical space Z, and set the flag bit of the second user data as valid.

In addition, after the original system is restarted, the above steps S320 to S380 are repeated to ensure that the write cache data is not lost.

Embodiment four:

FIG. 4 is a schematic diagram of a system for saving memory data when the system is abnormal according to Embodiment 4 of the present invention.

The embodiment of the present invention also provides a system for storing memory data when the system is abnormal, which is used to realize the method for storing memory data when the system is abnormal provided in the above embodiments. Referring to Figure 4, the memory data storage system when the system is abnormal includes the following units:

The first reserved space unit 100 is configured to reserve an address space in the memory by configuring the original system, and save the log buffer data and user application buffer data cached in the original system into the address space;

The first data storage unit 200 is used to switch the original system to the kdump system, the kdump system mounts the partitions of the original system, and based on the address space, saves the log buffer data and the user application buffer data to the matching partitions in the original system respectively middle;

The second reserved space unit 300 is used to partition the original system, reserve physical space, and reserve cache space in the memory by configuring the original system;

The first writing unit 400 is configured to write the first user data whose flag bit is valid in the physical space Z into the disk array;

The second writing unit 500 is configured to write the second user data generated in real time into the cache space, and then write it into the disk array according to an optimization strategy;

The second data saving unit 600 is configured to switch the original system to the kdump system, save the second user data in physical space, and set the flag bit of the second user data to valid.

Further, the first reserved space unit 100 includes:

By configuring the grub.conf of the original system, the address space is reserved in the memory;

Obtain the structure of the log buffer of the original system and the structure of the user application data buffer;

In the case of a system exception, call panic, and save the data in the log buffer to the address space through the structure of the log buffer;

And, save the data in the user application buffer area to the address space through the structure of the user application data buffer area.

Further, the first data storage unit 200 includes:

Map the address space to obtain the memory virtual address that the original system has access to;

Switch the original system to the kdump system, and the kdump system mounts the partition of the original system;

Read the data in the log buffer area and the data in the user application buffer area through the memory virtual address and save them in matching partitions respectively.

The embodiments of the present invention bring the following beneficial effects: the present invention provides a method and system for storing memory data when the system is abnormal, including: by configuring the original system, reserving an address space in the memory, and storing the data cached in the original system The log buffer data and user application buffer data are saved in the address space; the original system is switched to the kdump system, and the kdump system mounts the partition of the original system, and based on the address space, the log buffer data and user application buffer data are saved separately to the matching partition in the original system; partition the original system, reserve physical space, and reserve cache space in the memory by configuring the original system; write the first user data with valid flags in the physical space to Disk array; after writing the second user data generated in real time into the cache space, write it into the disk array according to the optimization strategy; switch the original system to the kdump system, save the second user data in the physical space, and save the second user data The flag bit is set to valid. The invention can solve the problem of partial data loss in the internal memory when the system crashes, downtime or deadlock occurs.

The implementation principles and technical effects of the system provided by the embodiments of the present invention are the same as those of the foregoing method embodiments. For brief description, for the parts not mentioned in the system embodiments, reference may be made to the corresponding content in the foregoing method embodiments.

The embodiment of the present invention also provides an electronic device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the computer program, the storage of the memory data when the system is abnormal provided by the above embodiment is realized. method steps.

An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the steps of the method for storing memory data when the system is abnormal in the foregoing embodiments are executed.

In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for description purposes only, and should not be understood as indicating or implying relative importance.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

Finally, it should be noted that: the above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them, and the scope of protection of the present invention is not limited thereto, although referring to the foregoing The embodiment has described the present invention in detail, and those of ordinary skill in the art should understand that any person familiar with the technical field can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of the present invention within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A method for preserving memory data when a system is abnormal, characterized in that it comprises: By configuring the original system, an address space is reserved in the memory, and the log buffer data and user application buffer data cached in the original system are stored in the address space; Switching the original system to the kdump system, the kdump system mounts the partition of the original system, and based on the address space, saves the log buffer data and the user application buffer data to the original In the said partition that matches in the system; Partitioning the original system, reserving physical space, and reserving cache space in memory by configuring the original system; writing the first user data with valid flag bits in the physical space into the disk array; After writing the second user data generated in real time into the cache space, write it into the disk array according to the optimization strategy; Switching the original system to the kdump system, saving the second user data into the physical space, and setting the flag bit of the second user data to valid; After the original system is restarted, repeatedly read the flag bits of the first user and the second user, and write the data with valid flag bits into the disk array. 2. The method according to claim 1, characterized in that, by configuring the original system, an address space is reserved in the memory, and the log buffer data and the user application buffer area cached in the original system are Data is saved to the address space, including: By configuring the startup manager file grub.conf of the original system, the address space is reserved in memory; Acquiring the structure of the log buffer of the original system and the structure of the user application data buffer; In the case of a system exception, call the runtime panic function panic, and save the log buffer data to the address space through the structure of the log buffer; And, saving the data in the user application buffer area to the address space through the structure of the user application data buffer area. 3. The method according to claim 1, wherein the switching of the original system to the kdump system, the kdump system mounts the partition of the original system, and based on the address space, the log The cache area data and the user application cache area data are respectively stored in the matching partitions in the original system, including: Mapping the address space to obtain a memory virtual address that the original system has access to; Switching the original system to the kdump system, the kdump system mounts the partition of the original system; The data in the log buffer area and the data in the user application buffer area are read through the memory virtual address and stored in the matching partitions respectively. 4. The method according to claim 1, wherein said partitioning said original system, reserving physical space, and reserving cache space in memory by configuring said original system, comprises: Partitioning the original system, and reserving the matching physical space according to the cache size; The cache space is reserved in memory by configuring the boot manager file grub.conf of the original system. 5. The method according to claim 1, wherein the writing the first user data with effective flag bits in the physical space into the disk array comprises: Acquire the flag bit of the data recorded in the physical space through the user application; judging whether the flag bit is valid; If valid, verifying through the user application and writing the corresponding first user data into the disk array; If invalid, no processing is performed. 6. The method according to claim 1, characterized in that, switching the original system to the kdump system, saving the second user data in the physical space, and storing the second The flag bits of user data are set to be valid, including: In the case of a system exception, call the runtime panic function panic, and switch the original system to the kdump system; Based on the kdump system, write the second user data in the cache space into the physical space, and set the flag bit of the second user data to valid. 7. A storage system for memory data when the system is abnormal, characterized in that it comprises: The first reserved space unit is configured to reserve an address space in the memory by configuring the original system, and save the log buffer data and user application buffer data cached in the original system into the address space ; The first data storage unit is configured to switch the original system to the kdump system, the kdump system mounts the partition of the original system, and caches the log buffer data and the user application based on the address space The zone data is respectively stored in the matching partitions in the original system; The second reserved space unit is used to partition the original system, reserve physical space, and reserve cache space in memory by configuring the original system; The first writing unit is configured to write the first user data with valid flag bits in the physical space into the disk array; The second writing unit is configured to write the second user data generated in real time into the cache space, and then write it into the disk array according to an optimization strategy; The second data storage unit is configured to switch the original system to the kdump system, store the second user data in the physical space, and set the flag bit of the second user data to valid; After the original system is restarted, repeatedly read the flag bits of the first user and the second user, and write the data with valid flag bits into the disk array. 8. The system according to claim 7, wherein the first over-provisioning unit comprises: By configuring the grub.conf of the original system, the address space is reserved in memory to obtain the address space; Acquiring the structure of the log buffer of the original system and the structure of the user application data buffer; In the case of a system exception, call panic, and save the log buffer data to the address space through the structure of the log buffer; And, saving the data in the user application buffer area to the address space through the structure of the user application data buffer area. 9. The system according to claim 7, wherein the first data storage unit comprises: Mapping the address space to obtain a memory virtual address that the original system has access to; Switching the original system to the kdump system, the kdump system mounts the partition of the original system; The data in the log buffer area and the data in the user application buffer area are read through the memory virtual address and stored in the matching partitions respectively.

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