CN103108051A - Synchronous file sharing method from cloud server - Google Patents
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Abstract
The invention discloses a synchronous file sharing method from a cloud server. Firstly, roll polling that whether the cloud server has shared files which need to be synchronized or not is conducted by file sharing users in the same local area network, is the cloud server has the shared files which need to be synchronized, a file requiring data package is sent in the local area network; all the users in the local area network search whether data for sharing the files are contained or not after receiving the file requiring data package, if the data are contained, a response data package is sent, and if not, no response is given; and the users who sent the file requiring data package collect the response data package in the local area network and judge whether the local area network has data need to be downloaded of the shared file by the users or not, if users in the local area network have the data, the data of the shared file are obtained from the users who possess the data. The method greatly improves efficiency synchronous file sharing from the cloud server and reduces occupied network bandwidth.
Description
Technical field
The present invention relates to the cloud technical field of memory, relate in particular to a kind of method from the synchronous shared file of cloud server.
Background technology
Along with the development of Internet technology, cloud computing and cloud storage just more and more receive the concern of IT industry circle, and it is used also and promotes gradually, has obtained favorable comment widely.The cloud storage is in cloud computing (cloud computing) conceptive extension and a development new concept out, cloud computing is the development of distributed treatment (Distributed Computing), parallel processing (Parallel Computing) and grid computing (Grid Computing), be to see through network huge computing program is split into numerous less subprogram automatically, then transfer to bulky systems that the multi-section server forms and analyze as calculated and afterwards result is returned to the user.By cloud computing technology, Internet Service Provider can be within the several seconds, processes number in hundred million information necessarily even, reach and " supercomputer " same powerful network service.Concept and the cloud computing of cloud storage are similar, it refers to by functions such as cluster application, grid or distributed file systems, a large amount of various dissimilar memory devices in network are gathered collaborative work by application software, a system of data storage and Operational Visit function externally is provided jointly.All devices in the cloud form storage system is all fully transparent to the user, and Anywhere any one can be connected with the cloud storage by an access cable through the user who authorizes, and cloud is stored into capable data access.
In cloud storage scheme commonly used, user's data are stored in cloud server, and user's any apparatus accessing Internet can be taken the data that are stored in cloud server, and can realize applying in a flexible way of many station terminals, is not limited in which station terminal.At present cloud storage expands to the high in the clouds data sharing between the user of working group gradually, and a user can set up the working group of oneself, and with the high in the clouds data sharing to the work group member, be convenient between the work group member based on common data collaborative work.Yet at present the cloud server data are synchronized to work group member this locality, all generally to adopt directly from the cloud server downloading data, when needs heap file data need to synchronously download to this locality from high in the clouds, can produce the transmission of high amount of traffic amount, with taking the very the Internet access bandwidth resource of multiserver end and local network, even cause the outlet bandwidth congestion phenomenon." MPC " network congestion accident that for example occured in 2009.
When the user shares the high in the clouds data to the work group member, probably a lot of work group members are in same local area network (LAN), this is because working group sets up usually between the same member of unit, thereby when multi-user in same local area network (LAN) carries out high in the clouds data synchronous, particularly carry out when synchronous when the heap file data, network congestion is exactly a urgent problem.
Summary of the invention
The objective of the invention is to solve when in same local area network (LAN), sharing users is from the synchronous shared file of cloud server, particularly carry out the network congestion problem that causes when synchronous when the heap file data, a kind of method from the synchronous shared file of cloud server has been proposed, can the Fast synchronization shared file.
A kind of method from the synchronous shared file of cloud server is used for the interior sharing users of same local area network (LAN) from the synchronous shared file of cloud server, comprises step:
Whether (1), the sharing users poll in same local area network (LAN) detects cloud server has and need to carry out synchronous shared file;
(2), when finding to have need to carry out synchronous shared file the time, Transmit message request data package in local area network (LAN);
(3), after other sharing users in local area network (LAN) receive the file request packet, whether have the data of described shared file at local search, if having send the reply data bag, otherwise do not respond;
(4), the sharing users of Transmit message request data package is collected the reply data bag in local area network (LAN), if receive the reply data bag, according to the reply data bag from sending the described shared file of sharing users local synchronization of this reply data bag, otherwise enter next step;
(5), by at least one sharing users from the direct synchronous described shared file of cloud server.
Further, described step (1) comprises step:
(1.1), the sharing users poll cloud server in same local area network (LAN), to a up-to-date shared file information of cloud server acquisition request;
(1.2), the file data of shared file data and local storage in cloud server according to described shared file information, if find to have different files, represent that this file is exactly the synchronous shared files of needs.
Wherein, described shared file information comprises the filename of shared file, file size, fileversion number and file content summary.By comparing shared file information, just can judge which file is to carry out synchronous shared file.
Further, described file request packet is the udp broadcast packet, and described file request packet comprises the hashed value of described shared file and Packet Generation person's device id number.The file request packet sends to LAN subscriber by the form of udp broadcast, any LAN subscriber can both be received, can search in this locality the data of the shared file of asking during whether the file request packet is arranged after receiving the file request packet, have and reply response message to the sender, otherwise do not respond.
Further, have other sharing users of data of described shared file after receiving the file request packet, set up http server and generate and for the URL address of access, URL to be encapsulated in the sender who sends to described file request packet in the reply data bag.The sender of described file request packet resolves the reply data bag after receiving the reply data bag, access described URL address, from sending the described shared file of sharing users local synchronization of this reply data bag.
Wherein, described reply data bag comprises the machine device id, the data message of URL address and local this shared file, described URL address comprises the hashed value of the machine IP address, download port and described shared file, and described data message comprises original position and the size of local existing data block in described shared file.The reply data bag also can directly send the HASH value of the machine device id, the machine IP address, download port and described shared file, and the data message of local this shared file is to the sender of file request packet, the sender of file request packet resolves the reply data bag, synthetic URL address and access are from sending the described shared file of sharing users local synchronization of this reply data bag.
Further, comprise step by at least one sharing users from the direct synchronous described shared file of cloud server:
Sharing users in same local area network (LAN) is according to the file request packet that receives, and the synchronous sharing users number of judgement request shared file arranges the subscriber equipment quantity N that directly downloads from cloud server;
The device id of the machine device id number and other sharing users number relatively, if in the sharing users of the machine device id number in all same local area network (LAN)s according to ascending sort within top n, from the direct synchronous described shared file of cloud server, otherwise continue the Transmit message request data package.
By the subscriber equipment number of directly downloading shared file from cloud server is set, can effectively improve speed and the efficient of large user's synchronous shared file when measuring.
Further, the method from the synchronous shared file of cloud server of the present invention also comprises step:
Sharing users meeting timed sending file request packet before shared file is not synchronously completed is until shared file is synchronously completed.
The method from the synchronous shared file of cloud server that the present invention proposes, make the sharing users in same local area network (LAN) not need all to download shared file from cloud server, only need one or several user first to download shared file from cloud server, other users download shared file from the subscriber's local of having downloaded shared file, greatly improved from the efficient of the synchronous shared file of cloud server, reduced the network bandwidth that takies.
Description of drawings
Fig. 1 is embodiment of the present invention schematic network structure;
Fig. 2 is that the present invention is from the flow chart of the method for the synchronous shared file of cloud server.
Embodiment
Below in conjunction with drawings and Examples, technical solution of the present invention is described in further details, following examples do not consist of limitation of the invention.
As shown in Figure 1, three sharing users of A, B, C that are in same local area network (LAN) are arranged, cloud server has a newly-increased file to share to simultaneously the interior sharing users of these three same local area network (LAN)s, and newly-increased shared file is called shared file.
Take Fig. 1 as example, the present invention comprises step from the method flow of the synchronous shared file of cloud server as shown in Figure 2:
Whether the sharing users poll detection cloud server in step 21, same local area network (LAN) has need to be carried out synchronous shared file.
Whether three user A, B in same local area network (LAN), C detect cloud server by poll has and need to carry out synchronous shared file, when the file in Shared Folders has change (increase, revise or deletion) usually, just need to carry out synchronously.the user who uses the cloud storage to share can install a client, user A, B, their local client separately of C can be every some cycles, for example 60 seconds, shared file information inventory to cloud server acquisition request cloud server Shared Folders in a this time interval, compare according to the file of each fileinfo in inventory with local storage, fileinfo comprises filename, file size, FileVersion, the information such as file content summary, client can judge whether that needs carry out synchronous shared file according to result relatively, if find to exist different files, represent that this file is exactly the synchronous shared files of needs, and carry out synchronous, namely download new file, cover the file of revising, the file of Delete superfluous.
Need to prove, how relatively whether local data and cloud server data have differently, and which file how to judge has need renewal, not to be emphasis of the present invention, such as methods such as the hashed value of with good grounds file judge, repeat no more here.
Three user A, B, C in same local area network (LAN), whoso find to have in the time of need to carrying out the synchronous shared file of downloading, all Transmit message request UDP(User Datagram Protocol User Datagram Protocol in local area network (LAN)) broadcast data packet.The device id number that comprises the hashed value (HASH value) of this shared file and Packet Generation person in packet.
User A, B, C need synchronous shared file after overpolling if find to have, and will distinguish the Transmit message request data package so.
After all users in step 23, local area network (LAN) receive the file request packet, whether have the data of this shared file at local search, if having send the reply data bag, otherwise do not respond.
For example, if user A has sent the file request packet, user B and user C will receive this document request data package so, receive that rear user B and user C are just at local search, if find that its this locality has these shared file data (having downloaded file all or in part), send the reply data bag to user A, if local without the associated documents data and do not begin to download this shared file from high in the clouds and do not respond.
If user B this locality has this shared file data, after receiving the file request packet, setting up http server (http sever) and generate can be for the URL address of access, and this URL comprises host IP address, download port, and this shared file hash value of user B.And send the reply data bag to requesting party user A, the reply data bag comprises the machine device id of user B, and the data message of the URL address of harsh one-tenth and local this shared file, to user A feedback the machine device id and the machine IP, download port, the data message of this shared file hash value and local this shared file.User C this locality is these shared file data not, do not respond.The data message here refers to local existing data block original position and size hereof.
Need to prove, reply data bag of the present invention can comprise the URL address that is generated by user B, directly send to user A, also can comprise at the reply data bag IP address of user B, the hash value of download port and this shared file, generate URL and access by user A, the invention is not restricted to adopt which kind of method.
The sharing users of step 24, Transmit message request data package is collected the reply data bag in local area network (LAN), if receive the reply data bag, according to the reply data bag from sending this shared file of sharing users local synchronization of this reply data bag, otherwise enter next step.
The user A that sends request data package will wait for 5 seconds, collects and replys packet in local area network (LAN).After analyzing the reply packet, if find have subscriber's local to have the data of the synchronous shared file of needs in local area network (LAN), the user who has data from this this locality obtains file data.
For example user A receives the reply data bag of user B, according to the information that comprises in the reply data bag, and accesses this URL address, from user B local synchronization downloading data.If user C also has the data of this shared file in this locality, also send the reply data bag, this moment, user A first received just first synchronous this shared file wherefrom of whose response message.
If in local area network (LAN), nobody has this shared file data, namely user B and user C do not need the data of synchronous shared file in this locality, do not respond, and are at this time preferentially downloaded from cloud server by device id number little user.
If user A, user B and user C data of this shared file not in this locality all for example, all can the Transmit message request data package, can be the relatively own device id with other users of each user number is if the device id minimum of oneself is gone the cloud server synchrodata.User A, user B and user C come device id more separately according to the file request packet, device id number little client downloads this shared file from cloud server, after if user C passes through relatively, find the device id minimum of oneself, download this shared file from cloud server, user C is after receiving other users' file request packet, reply from the newly downloaded information of cloud server, this information comprises data block original position and the size hereof of downloading from high in the clouds, and synchronous for other users in local area network (LAN).
If the sharing users in same local area network (LAN) is counted overrate, in the more situation of simultaneous user, generally sentence many when identical file has 10 users of surpassing simultaneously synchronisation requirement to be arranged, at this time can regulate and sort that N equipment is from the synchronous downloading data of cloud server the preceding for No. ID, other users are to these device request file datas.
Namely according to the file request packet that receives, the synchronous sharing users number of judgement request shared file arranges the subscriber equipment quantity N that directly downloads from cloud server; The device id of the machine device id number and other sharing users number relatively, if in the sharing users of the machine device id number in all same local area network (LAN)s according to ascending sort within top n, from the direct synchronous described shared file of cloud server, otherwise continue the Transmit message request data package.
Need to prove, subscriber's local all is equipped with client, and above-mentioned steps is all brought in execution by the client, also can arranging by client determine to download shared file by several users from cloud server in the more situation of user.Can be the according to demand synchronous number of users of the method that arranges divided by 10 values that round as from the synchronous number of devices of cloud server, device id number does not affect effect of the present invention according to descending or ascending sort, namely can select device id number large user to go from the directly synchronous shared file of cloud server, also can select device id number little user to go to repeat no more from the directly synchronous shared file of cloud server here.Simultaneously request data package can timed sending before file is not synchronously completed, and continues that other users ask for file data in the local area network (LAN), and other users respond after receiving request data package accordingly.
Above embodiment is only in order to technical scheme of the present invention to be described but not be limited; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the method from the synchronous shared file of cloud server,, is characterized in that from the synchronous shared file of cloud server for the sharing users in the same local area network (LAN) that uses the cloud storage, comprises step:
Whether (1), the sharing users poll in same local area network (LAN) detects cloud server has and need to carry out synchronous shared file;
(2), when finding to have need to carry out synchronous shared file the time, Transmit message request data package in local area network (LAN);
(3), after other sharing users in local area network (LAN) receive the file request packet, whether have the data of described shared file at local search, if having send the reply data bag, otherwise do not respond;
(4), the sharing users of Transmit message request data package is collected the reply data bag in local area network (LAN), if receive the reply data bag, according to the reply data bag from sending the described shared file of sharing users local synchronization of this reply data bag, otherwise enter next step;
(5), by at least one sharing users from the direct synchronous described shared file of cloud server.
2. the method from the synchronous shared file of cloud server according to claim 1, is characterized in that, described step (1) comprises step:
(1.1), the sharing users poll cloud server in same local area network (LAN), to a up-to-date shared file information of cloud server acquisition request;
(1.2), the file data of shared file data and local storage in cloud server according to described shared file information, if find to have different files, represent that this file is exactly the synchronous shared files of needs.
3. the method from the synchronous shared file of cloud server according to claim 2, is characterized in that, described shared file information comprises the filename of shared file, file size, fileversion number and file content summary.
4. the method from the synchronous shared file of cloud server according to claim 1, is characterized in that, described file request packet is the udp broadcast packet.
5. the method from the synchronous shared file of cloud server according to claim 4, is characterized in that, described file request packet comprises the hashed value of described shared file and file request Packet Generation person's device id number.
6. the method from the synchronous shared file of cloud server according to claim 1, is characterized in that, has other sharing users of data of described shared file after receiving the file request packet, also comprises step:
Set up http server and generate and for the URL address of access, URL to be encapsulated in the sender who sends to described file request packet in the reply data bag.
7. the method from the synchronous shared file of cloud server according to claim 6, it is characterized in that, the sender of described file request packet is after receiving the reply data bag, resolve the reply data bag, access described URL address, from sending the described shared file of sharing users local synchronization of this reply data bag.
8. according to claim 6 or 7 described methods from the synchronous shared file of cloud server, it is characterized in that, described reply data bag comprises the machine device id, the data message of URL address and local this shared file, described URL address comprises the hashed value of the machine IP address, download port and described shared file, and described data message comprises original position and the size of local existing data block in described shared file.
9. the method from the synchronous shared file of cloud server according to claim 5, is characterized in that, comprises step by at least one sharing users from the direct synchronous described shared file of cloud server:
Sharing users in same local area network (LAN) is according to the file request packet that receives, and the synchronous sharing users number of judgement request shared file arranges the subscriber equipment quantity N that directly downloads from cloud server;
The device id of the machine device id number and other sharing users number relatively, if in the sharing users of the machine device id number in all same local area network (LAN)s according to ascending sort within top n, from the direct synchronous described shared file of cloud server, otherwise continue the Transmit message request data package.
10. the method from the synchronous shared file of cloud server according to claim 1, is characterized in that, also comprises step:
Sharing users can timed sending file request packet before shared file is not synchronously completed.
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| CN112202864A (en) * | 2020-09-24 | 2021-01-08 | 建信金融科技有限责任公司 | Context switching system, method, device, equipment and medium |
| CN112202864B (en) * | 2020-09-24 | 2022-12-09 | 建信金融科技有限责任公司 | Context switching system, method, device, equipment and medium |
| CN114785901A (en) * | 2022-03-28 | 2022-07-22 | 宁波一网信息技术有限公司 | Image retrieval method and system |
| CN114785901B (en) * | 2022-03-28 | 2024-06-11 | 宁波一网信息技术有限公司 | Image retrieval method and system |
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Application publication date: 20130515 |