CN102857570A - Cloud synchronized method of files and cloud storage server - Google Patents
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Abstract
The invention discloses a cloud synchronized method of files and a cloud storage server. The cloud synchronized method comprises the following steps: a metadata information table of a user is established, a unique file number is allocated to a file when the file is established for the user, and the file number is added in the metadata information table; an operating command of the user on the file is carried out, a new operation code is generated according to the operation command of each time of the user, and the operation code is added to the metadata information table so as to update the metadata information table; an operation code stored by a user terminal is acquired and compared with the operation code stored by a server, and if the two operation codes are not consistent, the file is synchronously updated according to the difference of the operation codes. The cloud storage server comprises a control module, an updating module and a synchronizing module. According to the technical scheme provided by the invention, a mechanism which is simple, high effective, convenient in management and easy in expansion is realized on a cloud storage platform, and the file synchronization among different terminals is effectively realized.
Description
Technical field
The present invention relates to the cloud memory technology, particularly the cloud method for synchronous of file and a kind of cloud storage server between a kind of multiple terminals.
Background technology
The demand of file synchronization from PC occur and extensive popularizing after just thereupon, the floppy disk in past, present USB flash disk, portable hard drive, and the immediate communication tools such as MSN, Email, QQ all are the main paties that people realized synchronously, shared file.The cloud storage is the conceptive development new concept out in cloud computing, refer to by functions such as cluster application, grid or distributed file systems, a large amount of dissimilar memory devices in the network are gathered collaborative work by application software, a system of data storage and Operational Visit function externally is provided jointly.Enter the epoch of cloud, cloud is stored in and helps people's storage file, management document, synchronous documents, shares the aspects such as file, and advantageous advantage and convenience are arranged.People no longer need back and forth the otherness of comparison document, selection, mobile, xcopy, and all things all are stored in quiet the finishing in backstage by cloud.At present, the cloud storage products of a lot of enterprises release can be realized the function of file synchronization between the multiple terminals.
Cloud refers to that synchronously on the cloud storage platform, the data between terminal and the server are synchronous, the perhaps data sharing between the different terminals centered by the individual.Along with developing rapidly of mobile office, mobile Internet, people can be by different terminals, such as notebook computer, ipad, smart mobile phone etc., editor and use identical file.How allowing the identical file on these different terminals keep synchronously, is a very real technical problem.
At present, utilizing the automatic synchronization backup functionality of cloud storage is a popular solution.For example, the user creates, has edited a doc document at notebook computer, and automatic synchronization is to the cloud memory space.When the user uses smart mobile phone, can by the cloud memory space this doc profile download to the mobile phone storage card, so just realized the file synchronization of notebook computer and mobile phone.
Realize the file synchronization of a plurality of terminals, the difference that needs the record different terminals to preserve file.The method that adopts at present is, by the metadata information of comparison document, perhaps with the change records of metadata information in the log daily record, find the difference of terminal and server data, and the further synchronous file of these differentiation.So-called metadata is the set of one group of information, is used for the file characteristic attribute of identifying user, generally includes the contents such as filename, path, modification time, author, authority, content, hash value.
There is following some problem in above-mentioned way:
On the cloud storage platform, the metadata information amount of file is very large, and the search coupling can be brought a large amount of overheads, affects server performance; Data structure is complicated, is difficult for expansion; Because metadata information can't recording increment, if the A terminal modifications file, then the B terminal can only all be downloaded again, and can't accomplish only to download incremental portion, can strengthen like this server I/O and bandwidth pressure; Because the metadata information record is the end-state of file, therefore can't accomplish tracking, the reduction of old version and record.
Summary of the invention
(1) technical problem to be solved
The object of the invention is to propose the cloud storage server of a kind of file cloud method for synchronous simple, efficient, easily expansion and realization the method, to solve the problem that the overhead that exists in the prior art is large, data structure is difficult for expansion, can't only downloads increment, can't follow the trail of and reduce old version.
(2) technical scheme
In order to solve the problems of the technologies described above, the present invention proposes the cloud method for synchronous of file between a kind of multiple terminals.The method may further comprise the steps:
S1, set up user's metadata information table, when described user creates file, be the unique reference number of a document of file allocation, and described reference number of a document is added in the metadata information table;
S2, carry out the user to the operational order of described file, generate new command code according to user's each time operational order, and described command code is added in the metadata information table, and then the update metadata information table;
S3, obtain the command code of the described file that user terminal preserves, and its command code with the server preservation is compared, if both are inconsistent, then carry out the synchronous renewal of file according to the difference of command code.
Optionally, described metadata information table also comprises at least one in filename, content coding, father node ID, the class of operation.
Optionally, the described reference number of a document uniquely tagged that is user file number.
Optionally, described command code is the sequence that the each time operational order according to the user increases progressively successively.
Based on same inventive concept, the present invention has proposed a kind of cloud storage server simultaneously.This cloud storage server comprises control module, update module and synchronization module, wherein,
Control module is used for setting up user's metadata information table, when described user creates file, is the unique reference number of a document of file allocation, and described reference number of a document is added in the metadata information table;
Update module be used for to be carried out the user to the operational order of described file, and generate new command code according to user's each time operational order, and described command code is added in the metadata information table, and then the update metadata information table;
Synchronization module is used for obtaining the command code of the described file that user terminal preserves, and its command code with the server preservation is compared, if both are inconsistent, then carries out the synchronous renewal of file according to the difference of command code.
Optionally, described metadata information table also comprises at least one in filename, content coding, father node ID, the class of operation.
Optionally, the described reference number of a document uniquely tagged that is user file number.
Optionally, described command code is the sequence that the each time operational order according to the user increases progressively successively.
(3) beneficial effect
In sum, the technical scheme of the present invention's proposition has following advantage:
When judging that file is whether synchronously, only need the reference number of a document in the metadata information table and command code are searched for coupling, greatly reduce overhead; Metadata structure is simple, easily expansion; During the synchronous renewal of execute file, only need to download incremental portion according to the command code difference, and need not all again to download, alleviated the pressure of server; According to the metadata information table, can follow the trail of, reduce old version and record.
Description of drawings
Fig. 1 is the structural representation of the cloud storage server that proposes of the present invention.
Fig. 2 is the realization flow figure of the cloud method for synchronous that proposes of the present invention.
Fig. 3 is the use scenes schematic diagram of the cloud method for synchronous that proposes of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Embodiment 1:
A kind of cloud storage server is provided in the present embodiment, processes synchronously for execute file between different terminals.As shown in Figure 1, this server specifically comprises: control module 11, update module 13 and synchronization module 15.
In addition, the aforesaid operations code also can be a descending series, determine a command code initial code according to actual conditions, successively decreasing according to user's each time operational order generates new command code, the synchronous renewal of execute file during command code that the command code that user terminal is preserved is preserved greater than server.
Embodiment 2:
The present embodiment provides a kind of cloud method for synchronous of file, and as shown in Figure 2, described method specifically may further comprise the steps:
Step S1 sets up user's metadata information table, when described user creates file, is the unique reference number of a document of file allocation, and described reference number of a document is added in the metadata information table.This step is carried out by control module 11.
The concrete use scenes of the present embodiment as shown in Figure 3, the user has many station terminals equipment, comprising: the desktop computer of office is that terminal A, individual notebook are that terminal B and smart mobile phone are terminal C.In the time of initialized, this user's cloud memory space is empty, and what terminal A, B, C were corresponding is same cloud memory space.After user's login, server is set up the metadata information table for this user, and the local operation code (hereinafter to be referred as command code B) of the local operation code of A (hereinafter to be referred as command code A), B, the local operation code (hereinafter to be referred as command code C) of C, server operation code all are initial code 0.The major parameter of metadata information table comprises user's reference number of a document, content coding, father node ID, filename, command code and class of operation etc., and described metadata information table is as shown in table 1 when initialization:
The initialized metadata information table of table 1
| FileGuid | ContentGuid | ParentID | Filename | OperationCode | Action |
Each parameter-definition is as follows in the table 1:
FileGuid, reference number of a document generates distribution by server, and the whole world is unique.
ContentGuid, the content coding generates distribution by server, and the whole world is unique.If file, then this list item is empty.
ParentID, father node ID.
Filename, filename.
OperationCode, command code increases progressively successively according to user's each time operational order.
Action, class of operation comprises establishment, modification, rename, movement, deletion.
Step S2 carries out the user to the operational order of described file, and according to user's each time operational order command code is increased progressively processing, and then the update metadata information table.This step is carried out by update module 13.
In scene as shown in Figure 3, the user uses terminal A to create the file of " work " by name, and the metadata information table upgrades as shown in table 2 on the server:
Metadata information table after table 2 upgrades for the first time
| FileGuid | ContentGuid | ParentID | Filename | OperationCode | Action |
| 409B5A3678 | / | work | 1 | Create |
The user uses terminal A to create the file of " project.ppt " by name, and the metadata information table is updated on the server:
Metadata information table after table 3 upgrades for the second time
| FileGuid | ContentGuid | ParentID | Filename | OperationCode | Action |
| 409B5A3678 | / | work | 1 | Create | |
| 3241CV018N | 342FSD9X76 | / | project.ppt | 2 | Create |
The user uses terminal A that " project.ppt " file is moved in " work " file, and the metadata information table is updated on the server:
Metadata information table after table 4 upgrades for the third time
| FileGuid | ContentGuid | ParentID | Filename | OperationCode | Action |
| 409B5A3678 | / | work | 1 | Create | |
| 3241CV018N | 342FSD9X76 | / | project.ppt | 2 | Create |
| 3241CV018N | 342FSD9X76 | 409B5A3678 | project.ppt | 3 | Mobile |
This moment terminal A command code A=server operation code=3, this means data and the server sync of terminal A.
Step S3, obtain the command code that user terminal is preserved, and the command code that itself and server are preserved compares, if the command code that the command code of this locality of the current terminal of user is preserved less than server, show that then this document has renewal, the user needs synchronously, and carries out synchronously renewal according to the difference of command code.This step is carried out by synchronization module 15.
As shown in Figure 3, when the user used terminal B login, terminal B transmit operation code B=0 was to server, and server is according to rear self command code=3 of finding of the metadata information table comparison of self preserving, command code B＜server operation code, then notification terminal B carries out the renewal between the server operation code 1-3.
After upgrading end, command code B=server operation code=3 mean terminal B also and server sync.
Next, the user uses terminal B that file is put in order, and with " project.ppt " RNTO " project_cloud.ppt ", the metadata information table is updated on the server:
Metadata information table after table 5 upgrades for the 4th time
The user uses terminal B to revise " project-cloud.ppt " file, has added several pages of contents, and server has been redistributed ContentGuid for it, and the metadata information table is updated on the server:
Metadata information table after table 6 upgrades for the 5th time
Follow-up, when the user re-used terminal A login cloud storage system, transmit operation code A=3 found command code A＜server operation code to server after the server comparison, and then notification terminal A carries out the renewal between the server operation code 3-5.
When carry out OperationCode=5 this time, find that ContentGuid has changed, only need to upgrade ContentGuid=342FSD9X76 to the incremental data between the ContentGuid=WER808234 this moment.
After upgrading end, the command code A=server operation code of user terminal A=5 mean terminal A also and server sync.
Like this, according to the user metadata information table that server is preserved, the variation that on arbitrary terminal that the user uses, all can review " project_cloud.ppt " old version:
A) x x month x day creates " project.ppt " file at root.
B) x x month x day " project.ppt " file moves under " work " catalogue.
C) x x month x day " project.ppt " file is renamed as " project_cloud.ppt " file.
D) x x month x day " project_cloud.ppt " is modified, and has added the xxx content.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (8)
1. the cloud method for synchronous of a file is characterized in that, said method comprising the steps of:
S1, set up user's metadata information table, when described user creates file, be the unique reference number of a document of file allocation, and described reference number of a document is added in the metadata information table;
S2, carry out the user to the operational order of described file, generate new command code according to user's each time operational order, and described command code is added in the metadata information table, and then the update metadata information table;
S3, obtain the command code of the described file that user terminal preserves, and its command code with the server preservation is compared, if both are inconsistent, then carry out the synchronous renewal of file according to the difference of command code.
2. method according to claim 1 is characterized in that, described metadata information table also comprises at least one in filename, content coding, father node ID, the class of operation.
3. method according to claim 1 is characterized in that, described reference number of a document is the uniquely tagged number of user file.
4. method according to claim 1 is characterized in that, described command code is the sequence that the each time operational order according to the user increases progressively successively.
5. a cloud storage server is characterized in that, comprises control module, update module and synchronization module, wherein,
Control module is used for setting up user's metadata information table, when described user creates file, is the unique reference number of a document of file allocation, and described reference number of a document is added in the metadata information table;
Update module be used for to be carried out the user to the operational order of described file, and generate new command code according to user's each time operational order, and described command code is added in the metadata information table, and then the update metadata information table;
Synchronization module is used for obtaining the command code of the described file that user terminal preserves, and its command code with the server preservation is compared, if both are inconsistent, then carries out the synchronous renewal of file according to the difference of command code.
6. server according to claim 5 is characterized in that, described metadata information table also comprises at least one in filename, content coding, father node ID, the class of operation.
7. server according to claim 5 is characterized in that, described reference number of a document is the uniquely tagged number of user file.
8. server according to claim 5 is characterized in that, described command code is the sequence that the each time operational order according to the user increases progressively successively.
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