CN106603729A - Distributed-file-system multi-client synchronization method and system thereof - Google Patents
Distributed-file-system multi-client synchronization method and system thereof Download PDFInfo
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- CN106603729A CN106603729A CN201710100064.2A CN201710100064A CN106603729A CN 106603729 A CN106603729 A CN 106603729A CN 201710100064 A CN201710100064 A CN 201710100064A CN 106603729 A CN106603729 A CN 106603729A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/44—Program or device authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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Abstract
The invention discloses a distributed-file-system multi-client synchronization method. The method comprises the following steps of determining whether a quantity of clients is 1, if the quantity of client is 1, giving an exclusive privilege for the client, and if the quantity of clients is not 1, distributing a write authority for the corresponding clients according to an application sequence of the write authority; after the client possessing the write authority writes in a file, updating corresponding metadata; and determining whether other clients possessing a read-write authority operate the above file, if there no other clients possessing the read-write authority to operate the above file, ending an operation, and if there is the other clients possessing the read-write authority to operate the above file, sending the updated metadata to the corresponding client. In the invention, the read-write authority of the client is sequentially managed; simultaneously delay synchronization is performed on a small file, after polymerization, the previous metadata is covered, after placing order is performed, a polymerized file is managed through using a common synchronization strategy, and management efficiency of multiple clients is increased. The invention also discloses a distributed-file-system multi-client synchronization system which possesses a same technology effect with the technology effect of the above method.
Description
Technical field
The present invention relates to, more particularly to a kind of distributed file system multi-client synchronous method and system.
Background technology
For distributed file system, due to its client distribution on different physical machines, therefore it is different
Client is mutually sightless for the operation of file system metadata and data.Then a client is there is for text
The modification of part system is to the sightless problem of another client, that is, there is asking for buffer consistency between multi-client
Topic.In prior art, data syn-chronization takes two methods：First, each client can on-line operation file, it is but different due to existing
The situation that client is operated simultaneously, has multiple data and covers simultaneously during data syn-chronization, now, synchronous result is only last
Mistake that the file of covering comes into force or system reports an error；2nd, server is synchronized to after client off-line operation file, it is now, identical
The synchronous multiple results of file meeting, when other users are visited again, it is impossible to determine which file is latest document.
In sum, how to improve the synchronous efficiency of management of multi-client is that those skilled in the art need to solve at present
Technical problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of distributed file system multi-client synchronous method and being
System, can significantly improve the synchronous efficiency of management of multi-client.Its concrete scheme is as follows：
A kind of distributed file system multi-client synchronous method, including：
Step S1：Whether the quantity for judging client is 1, if so, then gives the client exclusive authority, if it is not, then
Carry out step S2；
Step S2：By the application order of write permission, to corresponding client the write permission is distributed；
Step S3：Client with the write permission completes write to file, then update corresponding metadata；
Step S4：Determine whether that other have file described in the client operation of access limit, if it is not, then terminating behaviour
Make, if so, then the metadata after renewal is sent to corresponding client.
Preferably, giving exclusive authority described in the client includes：
Obtain the request of operation authority that the client sends；
The request of operation authority of the client is replied, to distribute corresponding operating right to the client；
Obtain the release authority request that the client sends；
Rights objects are discharged to the reply of the client.
Preferably, the operating right includes read right, write permission and client local cache authority.
Preferably, by the application order of the write permission, distributing the write permission to corresponding client also includes：
By the application order of read right, to corresponding client the read right is distributed.
Preferably, by the application order of the write permission, distributing the write permission to corresponding client also includes：
Remove the local cache authority of the client with the write permission.
Preferably, the client with the write permission completes write to file, then updating corresponding metadata includes：
Whether the size of the file that client application writes is judged less than preset value, if so, then using aggregation scheme write,
Wherein, the aggregation scheme is that the data of the client-side editing with write permission are written to into local cache, if sentencing
The size of the disconnected local cache is more than or equal to threshold value, then update corresponding metadata.
The invention also discloses a kind of distributed file system multi-client synchronization system, including：
Client terminal quantity judge module, for judging whether the quantity of client is 1；
Single client jurisdiction distribute module, use ought judge that the client terminal quantity gives the client exclusive right as 1, then
Limit；
Multi-client authority distribution module, use is when the client terminal quantity is judged not as 1, then the application by write permission is suitable
Sequence, to corresponding client the write permission is distributed；
Metadata updates module, for write to be completed to file when the client with the write permission, then updates corresponding
Metadata；
Client data update module, for determining whether that other have text described in the client operation of access limit
Part, if it is not, then end operation, if so, then sends the metadata after renewal to corresponding client.
The present invention discloses a kind of severe distributed file system multi-client synchronous method, including：Step S1：Judge client
Whether the quantity at end is 1, if so, then gives the client exclusive authority, if it is not, then carrying out step S2；Step S2：By writing power
The application order of limit, to corresponding client the write permission is distributed；Step S3：Client with the write permission is to file
Write is completed, then updates corresponding metadata；Step S4：Determine whether that other have described in the client operation of access limit
File, if it is not, then end operation, if so, then sends the metadata after renewal to corresponding client.It can be seen that, the present invention is adopted
To the same management of client-cache, by application order access limit is sequentially allocated, it is ensured that data are consistent, realize that multi-client is concurrent
Read-write；Simultaneously for the scene of small documents polymerization, this programme takes Lag synchronization, and after polymerization last time data rule it is covered
Front metadata, is managed after aggregate file rule using common synchronization policy.This method logic is simply easily achieved, while
The concurrent operations of distributed file system are realized, aggregate file is secondly directed to, visitor more is realized on the basis of polymerization efficiency is ensured
The synchronization of family end, the efficiency of management synchronous so as to improve multi-client.
The invention also discloses a kind of distributed file system multi-client synchronization system, with same as mentioned above
Technique effect, will not be described here.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 be invention additionally discloses a kind of distributed file system multi-client synchronous method schematic flow sheet；
Fig. 2 be invention additionally discloses a kind of specific distributed file system multi-client synchronization system structural representation
Figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the invention discloses a kind of distributed file system multi-client synchronous method, shown in Figure 1, bag
Include：
Step S1：Whether the quantity for judging client is 1, if so, then gives above-mentioned client exclusive authority, if it is not, then
Carry out step S2.
When client terminal quantity only exists single client for 1, i.e. distributed system, therefore it is same to there are no other client datas
Step delay issue, can give exclusive authority to the client.
When client terminal quantity is not 1, client terminal quantity is multi-client system more than or equal to 1, the i.e. distributed system,
Now, there is the data syn-chronization delay issue of multiple client access, needs are operated accordingly.
In a kind of specific embodiment, giving the exclusive authority of single client includes：Obtain what single client sent
Request of operation authority；The request of operation authority of single client is replied, to distribute corresponding operating right to single client；
After the completion of single client is to corresponding Document Editing, the release authority request that single client sends is obtained；To single client
The reply release rights objects at end.
It should be noted that operating right generally include read right, the write permission and client for the treatment of editing files it is local
Caching authority.Client is treated editing files and is read out, and needs the read right for obtaining the file to be edited, client to treat volume
Collect file and enter edlin, treat the write permission of editing files, certainly, because the inventive point of the present invention is to distributed system unit
, when distributed system only exists single client, there is no other client data synchronization delays in online data synchronized update,
Therefore single client local cache authority can be given.
Need it is further noted that the present disclosure applies equally to the write permission in some existing systems includes read right
Situation.
Step S2：By the application order of write permission, to corresponding client above-mentioned write permission is distributed.
Due to the read right that client is obtained, authority is read in the only inquiry of corresponding document, not with entering to this document
The authority of edlin, will not change the content of this document, therefore, it can be that same file distributes reading to more than multiple client
Authority, i.e. identical file are supported to be conducted interviews by multiple client in the same time, i.e., identical file can within the same time period
Continue to access to be exceeded a client.
Certainly, in order to preferably manage each client, identical file is made to carry out in same time only one of which client
Editor is accessed, above-mentioned read right can also be distributed to corresponding client by the application of read right order.
In a kind of specific embodiment, the meta data server in distributed system gets customer end A application
Write permission, confirms that customer end A is after legitimate client, to customer end A the write permission and cache authorities of corresponding document, visitor to be distributed
Family end A then enters edlin to this document.Now, meta data server gets the access limit of customer end B application again, then first number
According to server after the write permission for withdrawing customer end A, just distribute access limit to customer end B.Certainly, meta data server also may be used
Before the write permission for withdrawing customer end A, to customer end B read right is distributed.
Because the inventive point of the present invention is that distributed system metadata on-line synchronous are updated, when distributed system includes
, i.e., more than 1 client, then there is multiple client data syn-chronization delay issue in multi-client, therefore, in order that corresponding data
The real-time update in distributed system, then remove the local cache authority of the client with above-mentioned write permission.
Step S3：Client with above-mentioned write permission completes write to file, then update corresponding metadata.
In order to improve the treatment effeciency of small documents, the present invention adopts aggregation scheme for small documents.Small documents herein are needed
To be compared with preset value in meta data server in distributed system, if being less than the preset value, can determine that this document is
Small documents, accordingly using aggregation scheme.
Concrete implementation mode is whether the size for judging the file that client application writes is less than preset value, if so, then
Write using aggregation scheme, wherein, above-mentioned aggregation scheme is to be written to the data of the client-side editing with write permission locally
Caching, if judging, the size of above-mentioned local cache, more than or equal to threshold value, updates corresponding metadata.
If the non-lower wall of data, client can be write the data to always in polymerization caching, the data in polymerization caching
Amount is more than or equal to threshold value, then the data in polymerization caching are updated in meta data server.
It should be noted that polymerization caching includes local cache and specific network-caching, authorities are gentle to save as specifically
During network-caching, the storage processing speed of the network-caching should be better than the processing speed of distributed system.
Step S4：Determine whether that other have the above-mentioned file of the client operation of access limit, if it is not, then terminating behaviour
Make, if so, then the metadata after renewal is sent to corresponding client.
If conducting interviews to the file after renewal editor without other clients, this document, and the text before covering are preserved
Part, certainly, also can be compiled into content to the history of this document by revision sequencing and be preserved.
If there are other clients to access it, that is, there are other clients with read right, then by the file after renewal
Other clients that there is read right to this are sent, and updates the local metadata of relative client.
The invention also discloses a kind of distributed file system multi-client synchronization system, shown in Figure 2, including client
End quantity judge module 11, single client jurisdiction distribute module 12, multi-client authority distribution module 13, metadata updates module
14 and client data update module 15, wherein：
Client terminal quantity judge module 11, for judging whether the quantity of client is 1.
When client terminal quantity only exists single client for 1, i.e. distributed system, therefore it is same to there are no other client datas
Step delay issue, can give exclusive authority by single client jurisdiction 12 pairs of clients of distribute module.
When client terminal quantity is not 1, client terminal quantity is multi-client system more than or equal to 1, the i.e. distributed system,
Now, there is the data syn-chronization delay issue of multiple client access, need multi-client authority distribution module 13 to carry out accordingly
Operation.
Need it is further noted that the present disclosure applies equally to the write permission in some existing systems includes read right
Situation.
Single client jurisdiction distribute module 12, use ought judge that above-mentioned client terminal quantity gives above-mentioned client as 1, then and monopolizes
Authority.
In a kind of specific embodiment, giving the exclusive authority of single client includes：Obtain what single client sent
Request of operation authority；The request of operation authority of single client is replied, to distribute corresponding operating right to single client；
After the completion of single client is to corresponding Document Editing, the release authority request that single client sends is obtained；To single client
The reply release rights objects at end.
It should be noted that operating right generally include read right, the write permission and client for the treatment of editing files it is local
Caching authority.Client is treated editing files and is read out, and needs the read right for obtaining the file to be edited, client to treat volume
Collect file and enter edlin, treat the write permission of editing files, certainly, because the inventive point of the present invention is to distributed system unit
, when distributed system only exists single client, there is no other client data synchronization delays in online data synchronized update,
Therefore single client local cache authority can be given.
Multi-client authority distribution module 13, use is when above-mentioned client terminal quantity is judged not as 1, then the application by write permission is suitable
Sequence, to corresponding client above-mentioned write permission is distributed.
Due to the read right that client is obtained, authority is read in the only inquiry of corresponding document, not with entering to this document
The authority of edlin, will not change the content of this document, therefore, it can be that same file distributes reading to more than multiple client
Authority, i.e. identical file are supported to be conducted interviews by multiple client in the same time, i.e., identical file can within the same time period
Continue to access to be exceeded a client.
Certainly, in order to preferably manage each client, identical file is made to carry out in same time only one of which client
Editor is accessed, above-mentioned read right can also be distributed to corresponding client by the application of read right order.
In a kind of specific embodiment, the meta data server in distributed system gets customer end A application
Write permission, confirms that customer end A is after legitimate client, to customer end A the write permission and cache authorities of corresponding document, visitor to be distributed
Family end A then enters edlin to this document.Now, meta data server gets the access limit of customer end B application again, then first number
According to server after the write permission for withdrawing customer end A, just distribute access limit to customer end B.Certainly, meta data server also may be used
Before the write permission for withdrawing customer end A, to customer end B read right is distributed.
Because the inventive point of the present invention is that distributed system metadata on-line synchronous are updated, when distributed system includes
, i.e., more than 1 client, then there is multiple client data syn-chronization delay issue in multi-client, therefore, in order that corresponding data
The real-time update in distributed system, then remove the local cache authority of the client with above-mentioned write permission.
Metadata updates module 14, completes write to file, then more cenotype for working as the client with above-mentioned write permission
The metadata answered.
In order to improve the treatment effeciency of small documents, the present invention adopts aggregation scheme for small documents.Small documents herein are needed
To be compared with preset value in meta data server in distributed system, if being less than the preset value, can determine that this document is
Small documents, accordingly using aggregation scheme.
Concrete implementation mode is whether the size for judging the file that client application writes is less than preset value, if so, then
Write using aggregation scheme, wherein, above-mentioned aggregation scheme is to be written to the data of the client-side editing with write permission locally
Caching, if judging, the size of above-mentioned local cache, more than or equal to threshold value, updates corresponding metadata.
If the non-lower wall of data, client can be write the data to always in polymerization caching, the data in polymerization caching
Amount is more than or equal to threshold value, then the data in polymerization caching are updated in meta data server.
It should be noted that polymerization caching includes local cache and specific network-caching, authorities are gentle to save as specifically
During network-caching, the storage processing speed of the network-caching should be better than the processing speed of distributed system.
Client data update module 15, for determining whether that other have the above-mentioned text of the client operation of access limit
Part, if it is not, then end operation, if so, then sends the metadata after renewal to corresponding client.
If conducting interviews to the file after renewal editor without other clients, this document, and the text before covering are preserved
Part, certainly, also can be compiled into content to the history of this document by revision sequencing and be preserved.
If there are other clients to access it, that is, there are other clients with read right, then by the file after renewal
Other clients that there is read right to this are sent, and updates the local metadata of relative client.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.And, term " including ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that a series of process, method, article or equipment including key elements not only includes that
A little key elements, but also including other key elements being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element for being limited by sentence "including a ...", does not arrange
Except also there is other identical element in including the process of the key element, method, article or equipment.
A kind of distributed file system multi-client synchronous method provided by the present invention and system have been carried out in detail above
Thin to introduce, specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help and understand the method for the present invention and its core concept；Simultaneously for one of ordinary skill in the art, foundation
The thought of the present invention, will change in specific embodiments and applications, and in sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of distributed file system multi-client synchronous method, it is characterised in that include：
Step S1：Whether the quantity for judging client is 1, if so, then gives the client exclusive authority, if it is not, then carrying out
Step S2；
Step S2：By the application order of write permission, to corresponding client the write permission is distributed；
Step S3：Client with the write permission completes write to file, then update corresponding metadata；
Step S4：Determine whether that other have file described in the client operation of access limit, if it is not, then end operation, if
It is then the metadata after renewal to be sent to corresponding client.
2. distributed file system multi-client synchronous method according to claim 1, it is characterised in that give the visitor
Authority is monopolized described in the end of family to be included：
Obtain the request of operation authority that the client sends；
The request of operation authority of the client is replied, to distribute corresponding operating right to the client；
Obtain the release authority request that the client sends；
Rights objects are discharged to the reply of the client.
3. distributed file system multi-client synchronous method according to claim 2, it is characterised in that the operating rights
Limit includes read right, write permission and client local cache authority.
4. distributed file system multi-client synchronous method according to claim 1, it is characterised in that write power by described
The application order of limit, distributing the write permission to corresponding client also includes：
By the application order of read right, to corresponding client the read right is distributed.
5. distributed file system multi-client synchronous method according to claim 4, it is characterised in that write power by described
The application order of limit, distributing the write permission to corresponding client also includes：
Remove the local cache authority of the client with the write permission.
6. distributed file system multi-client synchronous method according to claim 1, it is characterised in that write with described
The client of authority completes write to file, then updating corresponding metadata includes：
Whether the size of the file that client application writes is judged less than preset value, if so, then using aggregation scheme write,
Wherein, the aggregation scheme is that the data of the client-side editing with write permission are written to into local cache, if judging institute
The size of local cache is stated more than or equal to threshold value, then updates corresponding metadata.
7. a kind of distributed file system multi-client synchronization system, it is characterised in that include：
Client terminal quantity judge module, for judging whether the quantity of client is 1；
Single client jurisdiction distribute module, use ought judge that the client terminal quantity gives the client exclusive authority as 1, then；
Multi-client authority distribution module, use ought judge the client terminal quantity not as 1, then by the application order of write permission, to
Corresponding client distributes the write permission；
Metadata updates module, for write to be completed to file when the client with the write permission, then updates corresponding unit
Data；
Client data update module, for determining whether that other have file described in the client operation of access limit, if
No, then if so, end operation then sends the metadata after renewal to corresponding client.
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| CN107172152A (en) * | 2017-05-19 | 2017-09-15 | 郑州云海信息技术有限公司 | One kind counts quota system and method based on CEPH cluster CAP mechanism |
| CN107704596A (en) * | 2017-10-13 | 2018-02-16 | 郑州云海信息技术有限公司 | A kind of method, apparatus and equipment for reading file |
| CN108021647A (en) * | 2017-11-30 | 2018-05-11 | 郑州云海信息技术有限公司 | A kind of file migration method, system, medium and equipment |
| CN109284274A (en) * | 2018-11-29 | 2019-01-29 | 郑州云海信息技术有限公司 | A kind of asynchronous predistribution implementation method of configuration based on distributed file system |
| CN111858541A (en) * | 2020-06-29 | 2020-10-30 | 广东浪潮大数据研究有限公司 | Data migration control method and related device of distributed file system |
| CN113127437A (en) * | 2019-12-31 | 2021-07-16 | 阿里巴巴集团控股有限公司 | File system management method, cloud system, device, electronic equipment and storage medium |
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