WO2013075563A1

WO2013075563A1 - File sharing system, method for achieving file sharing, and file index service device

Info

Publication number: WO2013075563A1
Application number: PCT/CN2012/083232
Authority: WO
Inventors: 马苏安
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-11-23
Filing date: 2012-10-19
Publication date: 2013-05-30
Also published as: CN102419770B; CN102419770A

Abstract

Disclosed are a file sharing system, a method for achieving file sharing, and a file index service device. The method comprises: a file-sharing storage device storing a file block which at least could be accessed by two clients; a file index service device establishing a file system for each client where a file index corresponding to the file block that the client could access is set; establishing a correlation between each file index and a file block name, storing the correlation in a file index database; reading a corresponding file index from the file system of the client upon receiving a file reading request sent by the client; reading a corresponding file block according to the file index and sending the file data in the corresponding file block to the client. The system, the method for achieving file sharing, and the file index service device in the present invention ensure that each client has an independent file system, and achieve sharing the same file block among a plurality of clients.

Description

File sharing system and method for implementing file sharing, file indexing service device

The present invention relates to the field of information technology, and in particular, to a file sharing system, a method for implementing file sharing, and a file indexing service device. Background technique

In the prior art, the data center has largely adopted virtualization technology to provide virtual machine services to users. Virtualization technology is to divide physical resources into multiple logical partitions through virtualized software. Each partition is isolated from each other and become independent virtual machines. These virtual machines serve different users by sharing the same physical server.

In an environment with a large number of virtual machines, for example, in a desktop virtualization environment, each user corresponds to one virtual machine, and the number of virtual machines may reach hundreds of thousands or even millions. Since each virtual machine has its own operating system and applications, many of these operating systems and applications are duplicated. If each virtual machine has its own operating system and applications installed, it will take up a lot of storage space. This results in a serious waste of storage resources. Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and apparatus for file sharing that ensures that multiple clients have both a separate file system and the same file.

The invention provides a method for implementing file sharing, comprising the following steps:

The file sharing storage device stores a file block, and the file block can be accessed by at least two clients; the file cable service device establishes a file system of the client, and sets a file block corresponding to the file block that the client can access in the file system of the client. File index

Establishing a correspondence between each file index and a corresponding file block, and storing the corresponding relationship Stored in a preset file index database;

When receiving a file read request sent by the client, reading a corresponding file index from the file system of the client;

Reading a corresponding file block according to the file index, and sending the file data in the corresponding file block to the client.

Preferably, the reading the corresponding file block according to the file index is:

The corresponding file block name is read from the file index database according to the file index, and the corresponding file block is read from the file share storage device according to the file block name.

Preferably, the method for implementing file sharing, the method further includes:

The file indexing service device sets a reference count value of each file block, and the reference count value is a number of clients sharing the same file block;

Correspondingly, according to the file deletion request sent by the client, the corresponding file index in the file system of the client is deleted, and the correspondence between the file and the corresponding file block name in the file file database is deleted;

Decrease the reference count value of the corresponding file block by "1";

Determining whether the reference count value is zero;

When the reference count value is zero, the file sharing storage device is requested to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

The file indexing service device creates a corresponding copy file index in the file system of the client according to the file copy request sent by the client;

Calculating a copy file block sent by the client, determining the copy file block name; establishing and storing a correspondence relationship between the copy file index and the copy file block name in the file index database;

Determining whether there is a reference count value of the copy file block; If yes, add the reference count value of the copy file block to "1";

If not, the reference count value of the copy file block is counted, the reference count value of the copy file block is counted as "1", and the copy file block is sent to the file sharing storage device.

Preferably, the method for implementing file sharing further includes:

The file indexing service device reads the corresponding file index in the file system of the client according to the file modification request sent by the client;

Reading a corresponding file block name in the file index database according to the file index, and creating a copy of the file block name;

Sending a modification request to the file sharing storage device, so that the file sharing storage device establishes a corresponding file block copy according to the modification request, and modifying the file block copy according to the modification request; performing calculation on the modified file block copy to determine the file block name The copy name, in the file, preferably, the method for implementing file sharing, after the copy of the file name is created, the method further includes:

The file indexing service device decrements the reference count value of the file block by "1";

Preferably, the method for implementing file sharing, after updating a file block name corresponding to the file index to a copy name of a file block name in a file index database, the method further includes: the file indexing service device determining whether the file exists The reference count value of the file block copy;

If yes, the reference count value of the file block copy is incremented by "1", and the file block copy is deleted from the file sharing storage device;

If not, the reference count value of the file block copy is counted, and the reference count value of the file block copy is counted as "1".

The present invention also provides another method for implementing file sharing, the method comprising: Receiving a file read request from the client;

And determining, according to the received file read request, a file index corresponding to the client, where the file index has a correspondence relationship with a file block that the client can access;

Reading a file block corresponding to the file index;

Transmitting file data in the file block to the client.

The invention further provides a file sharing system, comprising:

a file sharing storage device, configured to store a file block, where the file block can be accessed by at least two clients;

a file indexing service device, configured to establish a file system of each client, and set a file index corresponding to the file block that the client can access in the file system of the client; establish a correspondence between each file index and the corresponding file block, and The corresponding relationship is stored in a preset file index database;

The file indexing service device includes:

a first reading module, configured to: when receiving a file read request sent by the client, read a corresponding file index from a file system of the client;

The second reading module is configured to read the corresponding file block according to the file index, and send the file data in the corresponding file block to the client.

Preferably, the second reading module is further configured to: read a corresponding file block name from the file index database according to the file index, and read the corresponding file block from the file sharing storage device according to the file block name.

Preferably, the file indexing service device further includes:

a reference count value setting module, configured to set a reference count value of each file block, where the reference count value is a number of clients sharing the same file block;

Deleting a sub-module, configured to delete a corresponding file index in the file system of the client according to the file deletion request sent by the client, and the file identifier and the corresponding file in the file I database Correspondence of file block names;

The first reference counting module is configured to reduce the reference count value of the corresponding file block by "1";

a first determining module, configured to determine whether the reference count value is zero;

The first deletion request module is configured to request to delete the file sharing storage device when the reference count value is zero! The file block corresponding to the count value is used to cause the file sharing storage device to delete the file block.

Preferably, the file indexing service device further includes:

a file index creation module, configured to create a corresponding copy file index in the file system of the client according to the file copy request sent by the client;

a file block name determining module, configured to calculate a copy file block sent by the client, and determine the copy file block name;

Correspondence relationship building module, used to build and file in the file! The correspondence between the copy file index and the copy file block name is stored in the database;

a second judging module, configured to determine whether a reference count value of the copy file block exists; and a second reference counting module, configured to add a reference count value of the copy file block when the reference count value of the copy file block exists 1"; and when the reference count value of the copy file block does not exist, the reference count value of the copy file block is counted, and the reference count value of the copy file block is counted as "1";

A file block sending module, configured to send the copy file block to the file sharing storage device. Preferably, the file indexing service device further includes:

a file block name copy creating module, configured to read a corresponding file index in the file system of the client according to the file modification request sent by the client; and read the corresponding file block in the file index database according to the file file Name, and create a copy of the file block name;

a file modification request sending module, configured to send a modification request to the file sharing storage device, so that the file sharing storage device creates a corresponding file block copy according to the modification request; Request to modify the copy of the file block;

a file block name update module, configured to calculate a modified copy of the file block, determine a copy name of the file block name, and update the file block name corresponding to the file file I to a file block in the file file I database The name of the copy.

Preferably, the file indexing service device further includes:

a third reference counting module, configured to: after creating a copy of the file name, reduce the reference count value of the file block by "1";

And a second deletion requesting module, configured to: when the reference count value is zero, request the file sharing storage device to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

Preferably, the file sharing system, the file indexing service device further includes: a third determining module, configured to determine whether there is a reference count value of the file block copy; the third reference counting module is further configured to exist when When the reference count value of the corresponding file block copy is, the reference count value of the file block copy is added to "1", and the file deletion storage module is requested to delete the file block copy by the second deletion request module; and when there is no corresponding When the reference count value of the file block copy is counted, the reference count value of the file block copy is counted, and the reference count value of the file block copy is counted as "1".

The present invention also provides another file sharing system, the system comprising:

a file indexing service device, configured to receive a file read request sent by the client;

Determining, according to the received file read request, a file index corresponding to the client, where the file index has a correspondence relationship with a file block that the client can access; a block, and the file in the file block Data is sent to the client. The present invention further provides a file indexing service device, including a first reading module, configured to: when receiving a file read request sent by a client, read a corresponding file index from a file system of the client; The second reading module is configured to read the file data in the corresponding file block from the file sharing storage device according to the file block name, and send the corresponding file block name. To the client.

The present invention also provides another file indexing service device, and the file arching service device includes:

a request receiving unit, configured to receive a file read request sent by the client;

a request processing unit, configured to determine, according to the received file read request, a file index corresponding to the client, where the file index has a corresponding relationship with a file block that the client can access;

A file block corresponding to the file file is read, and file data in the file block is sent to the client.

The file sharing system and the file sharing method thereof and the file indexing service device provided by the present invention have a file system of each client, and the file system includes a file index corresponding to the client-accessible file block; There is a file index corresponding to the corresponding file block name; when a client needs to read the file, the corresponding file index is read in the file system of the client according to the request of the client, and the corresponding file index is searched for. File block name, and then read the corresponding file block from the file sharing storage device according to the file block name, and send it to the corresponding client, that is, each client has an independent file system, and multiple Clients share the same file block. At the same time, when the file indexing service device deletes, copies or modifies the file blocks that can be accessed according to the request of a certain client, it does not have any influence on the file blocks accessible by other clients, and can be implemented for each client. Access to the file block for personalization. DRAWINGS

1 is a flow chart of an embodiment of a method for file sharing according to the present invention;

2 is another flow chart of an embodiment of a method for file sharing according to the present invention;

3 is another flow chart of an embodiment of a method for file sharing according to the present invention;

4 is another flow chart of an embodiment of a method for file sharing according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a file sharing system according to the present invention; FIG.

6 is a schematic structural diagram of a file indexing service device of the present invention;

7 is a schematic structural diagram of a file reading processing module of the present invention;

8 is another schematic structural diagram of a file indexing service device of the present invention;

9 is a schematic structural diagram of a file deletion processing module of the present invention;

10 is another schematic structural diagram of a file indexing service device of the present invention;

11 is a schematic structural diagram of a file copy processing module of the present invention;

12 is another schematic structural diagram of a file indexing service device of the present invention;

13 is a schematic structural diagram of a file modification processing module of the present invention;

14 is another schematic structural diagram of a file modification processing module of the present invention;

Figure 15 is a block diagram showing another structure of the file modification processing module of the present invention. detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 , an embodiment of a method for implementing file sharing according to the present invention includes: Step S101: A file sharing storage device stores a file block, where the file block can be accessed by at least two clients;

Step S102: The file indexing service device establishes a file system of each client, and sets a file index corresponding to the file block that the client can access in the file system of the client;

Step S103, establishing a correspondence between each file index and a corresponding file block, and Correspondence is stored to the default file! In the database;

Step S104: When receiving a file read request sent by the client, reading a corresponding file index from the file system of the client;

Step S105: Read a corresponding file block according to the file index, and send the file data in the corresponding file block to the client.

Further, in the foregoing embodiment, step S105 is specifically processed as follows: The corresponding file block name is read from the file index database according to the file index, and the corresponding file block is read from the file sharing storage device according to the file block name.

In the foregoing file sharing method embodiment, only one copy of the file block of the same content in the file sharing storage device is stored.

In the foregoing file sharing method embodiment, each client can only access its own file system, that is, only the file block corresponding to the file file in the file system of the file sharing storage device can be read.

The file index in the file association and the file block name in the file block name are named as the names of the corresponding file blocks in the file share storage device. The file index is the file index in the file system of different clients. Wherein, a file index can be associated with one or more file block names. The file block name may be a hash value of the content of the corresponding file block, such as an MD5 value, that is, the file block is named with the MD5 value of the file block content.

Further, in the foregoing method for implementing file sharing, the file read request sent by the client includes a path, a file name, and a storage location of the file to be read. When receiving the file read request sent by the client, reading the corresponding file index from the file system of the client is: generating a file index according to the path, the file name, and the storage location in the file read request, and according to the file index The generated file index reads the corresponding file index from the client's file system.

Further, referring to FIG. 2, in the foregoing method for implementing file sharing, the method further includes: Step S201: A file sharing storage device sets a reference count value of each file block, where the reference The count value is the number of clients sharing the same file block.

Step S202: The file indexing service device deletes a corresponding file index in the file system of the client and a correspondence between the file index and the corresponding file block name in the file system according to the file deletion request sent by the client.

Step S203, reducing the reference count value of the corresponding file block by "1";

Step S204, determining whether the reference count value is zero;

Step S205: When the reference count value is zero, request to the file sharing storage device to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

In the above implementation, the reference count value of the file block represents the number of clients sharing the file block. For example, the file sharing storage device stores a file block A, wherein the clients a, b, c, and d can access the file block A, that is, the client &, b, c, and d can share the file block A, then the file The reference count value of block A is "4".

Further, in the foregoing method for sharing a file, the file deletion request includes a path, a file name, and a storage location of the file to be deleted. Deleting the file index corresponding to the file system of the client according to the file deletion request sent by the client includes: generating a file index of the file to be deleted according to the file path, the storage location, and the file name in the file deletion request, and the file from the client Find and delete the corresponding file index in the system.

It can be seen from the foregoing embodiment that a certain client needs to delete a file block that can be accessed by the client, and only needs to delete the file index in the file system of the client, and establish the corresponding file index and file block name, which will correspond to The reference count value of the file block is reduced by "1", and the corresponding file block in the file sharing storage device does not need to be deleted, so the other clients are not affected. Only when the reference count value of the corresponding file block is "0", the file sharing storage device is requested to delete the corresponding file block, indicating that no corresponding file block is shared by the client.

Further, referring to FIG. 3, in the foregoing method for implementing file sharing in the file sharing system, the method further includes: Step S301: The file indexing service device creates a corresponding copy file index in the file system of the client according to the file copy request sent by the client.

Step S302: Perform calculation on a copy file block sent by the client, and determine the copy file block name;

Step S303, establishing and storing, in the file index database, a correspondence between the copy file index and the copy file block name;

Step S304, determining whether there is a reference count value of the copied file block;

Step S305: When there is a reference count value of the copy file block, add a reference count value of the copy file block to "1";

Step S306, when the reference count value of the copy file block does not exist, the reference count value of the copy file block is counted, the reference count value of the copy file block is counted as "1", and the copy file block is sent to File sharing storage device.

Further, in the foregoing method for sharing a file, the file copy request includes a path, a file name, and a storage location of the file to be copied. The generating, according to the file copy request sent by the client, the corresponding copy file index in the file system of the client includes: generating a file index of the file to be copied according to the file path, the storage location, and the file name in the file copy request, and at the client Create a corresponding copy file index in the file system of the end.

In the above embodiment, the step S304 further includes the following processing: discarding the copy file block sent by the client.

It can be seen from the foregoing method embodiment that a client is copying a file block that can be accessed, firstly creating a file index of the file to be copied, and determining whether there is a copy file block sent by the client in the file sharing storage device, and if it exists, only need to establish Copy the file index and copy the file block name correspondence, and add the reference count value of the corresponding file block to "1". It is not necessary to send the copy file block sent by the client to the file sharing storage device. Only if there is no corresponding file block in the file sharing storage device, the copy file block sent by the client needs to be sent to the file sharing storage device. Referring to FIG. 4, the method for implementing file sharing in the file sharing system further includes: Step S401: The file indexing service device reads a file index corresponding to the file system of the client according to the file modification request sent by the client;

Step S402: Read a corresponding file block name in the file index database according to the file index, and create a copy of the file block name;

Step S403: Send a modification request to the file sharing storage device, so that the file sharing storage device creates a corresponding file block copy according to the modification request, and modifies the file block copy according to the modification request.

Step S404: Perform calculation on the modified file block copy, and determine a copy name and a copy name of the file block name.

Further, in the foregoing method for sharing a file, the file modification request includes a path, a file name, and a storage location of the file to be modified. The reading, according to the file modification request sent by the client, the corresponding file index in the file system of the client includes: generating a file index of the file to be modified according to the file path, the storage location, and the file name in the file modification request, and reading the file index The corresponding file index in the client's file system.

Further, in the method embodiment of the foregoing file sharing, after the copy of the file name is created, the following processing is further included: the file indexing service device reduces the reference count value of the file block by "1"; when the reference count value is When the time is zero, the file sharing storage device is requested to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

Further, in the foregoing method for sharing a file, in the file index database, the file indexing service device determines whether there is a reference count value of the file block copy; when there is a reference count value of the corresponding file block copy; The reference count value of the file block copy is "1", and the file block copy is deleted from the file sharing storage device; when the corresponding file block copy does not exist The reference count value is counted by the reference count value of the file block copy, and the reference count value of the file block copy is counted as "1".

It can be seen from the above embodiment that a client needs to modify a file block that can be accessed. When the file sharing storage device stores the same file block as the file block copy, the file sharing storage device is requested to delete the file block copy. The reference count value of the file block is increased by "1", and the file block name corresponding to the file index is updated to the copy name of the file block name, so that the file sharing storage device does not have two file blocks with the same content.

In the foregoing method embodiment, the file storage service device is configured with a file system of each client, and the file system includes a file index corresponding to the client-accessible file block; and the file cable bow I and the corresponding file block name are established. When a client needs to read a file, it only needs to read the corresponding file index in the client's file system according to the client's request, find the file block name corresponding to the file index, and then from the file according to the file block name. The corresponding file block is read in the shared storage device and sent to the corresponding client, that is, each client has an independent file system, and multiple clients share the same file block. At the same time, when the file indexing service device deletes, copies or modifies the file blocks that can be accessed according to the request of a certain client, it does not have any influence on the file blocks accessible by other clients, and can be implemented for each client. Access to the file block for personalization.

Another embodiment of the method for implementing file sharing provided by the present invention includes the following steps: Step 501: Receive a file read request sent by a client;

Step 502: Determine, according to the received file read request, a file index corresponding to the client, where the file index has a corresponding relationship with a file block that the client can access;

Step 503: Read a file block corresponding to the file index.

Step 504: Send file data in the file block to the client.

Referring to Figures 5, 6, and 7, a file sharing system 1000 - an embodiment of the present invention, a file indexing service device 100 and a file sharing storage device 200 are presented. Wherein, the file sharing storage device 200, configured to store a file block, where the file block can be accessed by at least two clients. The file indexing service device 100 is configured to establish a file system of each client, set a file index corresponding to the file block that the client can access in the file system of the client, and establish a correspondence between each file index and the corresponding file block. And storing the corresponding relationship in a preset file index database. The file indexing service device 100 includes a file reading processing module 110, and the file reading processing module 110 includes a first reading module 111 and a second reading module 112. The first reading module 111 is configured to use the first reading module, configured to: when receiving the file reading request sent by the client, read the corresponding file index from the file system of the client; Block 112, configured to read a corresponding file block according to the file, and send the file data in the corresponding file block to the client.

Further, in the foregoing embodiment, the second reading module 112 is further configured to: read a corresponding file block name from the file index database according to the file index, and read from the file sharing storage device according to the file block name. Take the corresponding file block.

In the above embodiment of the file sharing system 1000, only one copy of the file block of the same content in the file sharing storage device is stored.

In the above embodiment, each client can only access its own file system, that is, it can only read the file block corresponding to the file file in the file system of the file sharing storage device.

Further, in the above embodiment, the file read request sent by the client includes a path, a file name, and a storage location of the file to be read, and the first reading module 111 is specifically configured to read the path and file according to the file. Name and storage location generate file index, and based on the generated file Index, reading the corresponding file index from the file system of the client.

Further, referring to FIG. 8 and FIG. 9 , in the foregoing file sharing system 1000, the file indexing service device 100 further includes a file deletion processing module 120, where the file deletion processing module 120 includes: a reference count value setting module 121, and a deletion. The sub-module 122, the first reference counting module 123, the first judging module 124, and the first deletion requesting module 125. The reference count value setting module 121 is configured to use a reference count value of each file block, and the reference count value is a number of clients sharing the same file block. The deleting sub-module 122 is configured to delete a corresponding file index in the file system of the client and a correspondence between the file index and the corresponding file block name in the file I database according to the file deletion request sent by the client. The first reference counting module 123 is configured to reduce the reference count value of the corresponding file block in the index data by "1". The first determining module 124 is configured to determine whether the reference count value is zero. The first deletion request module 125 is configured to: when the reference count value is zero, request the file sharing storage device to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

In the above implementation, the reference count value of the file block represents the number of clients sharing the file block. For example, a file sharing storage device stores a file block Α, wherein clients a, b, c, and d can access the file block A, that is, the client &, b, c, and d can share the file block A, then the file The reference count value of block A is "4".

Further, in the above embodiment of the file sharing system 1000, the file deletion request includes a path, a file name, and a storage location of the file to be deleted. The deleting sub-module 122 is further configured to generate a file index of the file to be deleted according to the file path, the storage location, and the file name in the file deletion request, and find and delete the corresponding file index from the file system of the client.

It can be seen from the foregoing embodiment that a certain client needs to delete a file block that can be accessed by the client, and only needs to delete the file index in the file system of the client, and establish the corresponding file index and file block name, which will correspond to The reference count value of the file block is reduced by "1", and the corresponding file block in the file sharing storage device does not need to be deleted, so the other clients are not affected. Only when corresponding If the reference count value of the file block is "0", the file sharing storage device is requested to delete the corresponding file block, indicating that no corresponding file block is shared by the client.

Further, referring to FIG. 10 and FIG. 11 , in the foregoing file sharing system 1000, the file indexing service device 100 further includes a file copy processing module 130, where the file copy processing module 130 includes: a file index creating module 131, and a file block. The name determining module 132, the correspondence establishing module 133, the second determining module 134, the second reference counting module 135, and the file block sending module 136. The file index creation module 131 is configured to create a corresponding copy file index in the file system of the client according to the file copy request sent by the client. The file block name determining module 132 is configured to calculate a copy file block sent by the client, and determine the copy file block name. The corresponding relationship establishing module 133 is configured to establish and store a correspondence between the copy file index and the copy file block name in the file index database. The second determining module 134 is configured to determine whether a reference count value of the copy file block exists. a second reference counting module 135, configured to: when the reference count value of the copy file block exists, add a reference count value of the copy file block to "1"; and when there is no reference count value of the copy file block, The reference count value of the copy file block is counted, and the reference count value of the copy file block is counted as "1". The file block sending module 136 is configured to send the copy file block to the file sharing storage device.

Further, in the above embodiment of the file sharing system 1000, the file copy request includes a path, a file name, and a storage location of the file to be copied. The file index creation module 131 is further configured to generate a file index of the file to be copied according to the file path, the storage location, and the file name in the file deletion request, and create a corresponding copy file index in the file system of the client.

In the above embodiment, the second reference counting module 135 is further configured to discard the copy file block sent by the client.

It can be seen from the above embodiment that a certain client is copying a file block that can be accessed, firstly creating a file index of the file to be copied, and determining whether there is a copy file block sent by the client in the file sharing storage device, and if it exists, only need to be established. Copy the correspondence between the file index and the copy file block name, Add the reference count value of the corresponding file block to "1", and do not need to send the copy file block sent by the client to the file sharing storage device. Only if there is no corresponding file block in the file sharing storage device, the copy file block sent by the client needs to be sent to the file sharing storage device.

Further, referring to FIG. 12 and FIG. 13 , in the foregoing file sharing system 1000, the file indexing service device 100 further includes: a file modification processing module 140, where the file modification processing module 140 includes: a file block name copy creation module 141. The file modification request sending module 142 and the file block name updating module 143. a file block name copy creating module 141, configured to: read a file index corresponding to the file system of the client according to the file modification request sent by the client; and read the corresponding file block name in the file index database according to the file index And create a copy of the file block name. The file modification request sending module 142 is configured to send a modification request to the file sharing storage device, so that the file sharing storage device creates a corresponding file block copy according to the modification request; and the file block copy is modified according to the modification request. a file block name update module 143, configured to calculate a modified copy of the file block, and determine a copy name of the file block name, which is further in the file index database, in the file sharing system 1000 embodiment, the file modification request It includes the path, file name, and storage location of the file to be modified. The file block name copy creation module 141 is further configured to generate a file index of the file to be modified according to the file path, the storage location, and the file name in the file modification request, and read a corresponding file index in the file system of the client.

Further, referring to FIG. 14, in the embodiment of the file sharing system 1000, the file modification processing module 140 further includes: a third reference counting module 144 and a second deletion requesting module 145. The third reference counting module 144 is further configured to reduce the reference count value of the file block by "1" after creating a copy of the file name. The second deletion request module 145 is configured to: when the reference count value is zero, request the file sharing storage device to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

Further, referring to FIG. 15, in the foregoing file sharing system 1000, the file repairing The modification processing module 140 further includes a third determination module 146. The third determining module, 146 is configured to determine whether there is a reference count value of the file block copy. The third reference counting module 144 is further configured to: when there is a reference count value of the corresponding file block copy, add a reference count value of the file block copy to "1", and share the file with the second deletion request module 145. The storage device requests to delete the file block copy; and when there is no reference count value of the corresponding file block copy, counting the reference count value of the file block copy, the reference count value of the file block copy is counted as "1" .

It can be seen from the foregoing apparatus 100 that a client needs to modify a file block that can be accessed. When the file sharing storage device stores the same file block as the file block copy, the file sharing storage device is requested to delete the file block copy. Adding the reference count value of the file block to " Γ , updating the file block name corresponding to the file file I to the copy name of the file block name, ensuring that the file sharing storage device does not have the same content. File block.

In the embodiment of the system 1000, the file system of each client is established by the file indexing service device 100, and the file system includes a file index corresponding to the client-accessible file block; and a file index corresponding to the corresponding file block name is established. When a client needs to read a file, it only needs to read the corresponding file index in the client's file system according to the client's request, find the file block name corresponding to the file index, and then from the file according to the file block name. The shared storage device 200 reads the corresponding file block and sends it to the corresponding client, that is, each client has an independent file system, and multiple clients share the same file block. At the same time, when the file indexing service device 100 deletes, copies or modifies the file blocks that can be accessed according to the request of a certain client, it does not have any influence on the file blocks accessible by other clients, and can be implemented as each client. Accessible file blocks for personalization.

Another embodiment of the file sharing system provided by the present invention includes:

a file indexing service device, configured to receive a file read request sent by the client; Determining, according to the received file read request, a file index corresponding to the client, where the file index has a correspondence relationship with a file block that the client can access; a block, and the file in the file block Data is sent to the client.

An embodiment of the file arching service device of the present invention is provided. The file indexing service device in the embodiment is the file indexing service device 100 in the file sharing system 1000, and another file index provided by the present invention is provided. Examples of service devices include:

It should be understood that the above is only a preferred embodiment of the present invention, and thus the scope of the invention is not limited thereby, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are used directly or indirectly. Other related technical fields are equally included in the scope of patent protection of the present invention.

Claims

Claim

A method for implementing file sharing, the method comprising:

The file sharing storage device stores a file block, and the file block can be accessed by at least two clients; the file indexing service device establishes a file system of the client, and sets a file index corresponding to the file block that the client can access in the file system of the client. ;

Establishing a correspondence between each file index and a corresponding file block, and storing the corresponding relationship in a preset file index database;

2. The method for implementing file sharing according to claim 1, wherein the reading the corresponding file block according to the file file is:

The method for implementing file sharing according to claim 1, wherein after the file sharing storage device stores the file block, the method further includes:

Decrease the reference count value of the corresponding file block by "1";

Determining whether the reference count value is zero;

When the reference count value is zero, requesting to delete the reference meter from the file sharing storage device The file block corresponding to the value, so that the file sharing storage device deletes the file block.

Determining whether there is a reference count value of the copy file block;

If yes, add the reference count value of the copy file block to "1";

The method for implementing file sharing according to any one of claims 1 to 4, wherein after the file sharing storage device stores the file block, the method further includes:

Sending a modification request to the file sharing storage device, so that the file sharing storage device establishes a corresponding file block copy according to the modification request, and modifying the file block copy according to the modification request; performing calculation on the modified file block copy to determine the file block name Copy name, in the file

The method for implementing file sharing according to claim 5, wherein after the copy of the file name is created, the method further includes:

The file indexing service device decrements the reference count value of the file block by "1"; When the reference count value is zero, the file sharing storage device is requested to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file block.

The method for implementing file sharing according to claim 6, wherein after the file, the method further comprises:

The file indexing service device determines whether there is a reference count value of the file block copy;

A method for implementing file sharing, the method comprising: receiving a file read request sent by a client;

Reading a file block corresponding to the file file I;

Transmitting file data in the file block to the client.

9. A file sharing system, wherein the system comprises:

The file indexing service device includes:

a first reading module, configured to receive a file read request sent by the client from the client Reading the corresponding file index in the file system of the terminal;

10. The file sharing system according to claim 9, wherein:

The second reading module is further configured to read a corresponding file block name from the file file I according to the file file, and read the corresponding file block from the file sharing storage device according to the file block name. .

The file sharing system according to claim 9, wherein the file indexing service device further comprises:

Deleting a sub-module, configured to delete, according to a file deletion request sent by the client, a corresponding file index in the file system of the client, and a correspondence between the file file and the corresponding file block name in the file file database;

a file block name determining module, configured to calculate a copy file block sent by the client, and determine the copy file block name; Correspondence relationship building module, used to build and file in the file! The correspondence between the copy file index and the copy file block name is stored in the database;

A file block sending module, configured to send the copy file block to the file sharing storage device.

The file sharing system according to any one of claims 9 to 12, wherein the file indexing service device further comprises:

a file modification request sending module, configured to send a modification request to the file sharing storage device, so that the file sharing storage device establishes a corresponding file block copy according to the modification request; and modifying the file block copy according to the modification request;

The file sharing system according to claim 13, wherein the file indexing service device further comprises:

a second deletion requesting module, configured to: when the reference count value is zero, request the file sharing storage device to delete the file block corresponding to the reference count value, so that the file sharing storage device deletes the file File block.

The file sharing system according to claim 14, wherein the file indexing service device further comprises:

a third judging module, configured to determine whether there is a reference count value of the file block copy; the third reference counting module is further configured to: when there is a reference count value of the corresponding file block copy, the reference count of the file block copy Adding a value of "1", and requesting deletion of the file block copy to the file sharing storage device by the second deletion request module; and a reference count value of the file block copy when there is no reference count value of the corresponding file block copy Counting, the reference count value of the file block copy is counted as "1".

16. A file sharing system, the system comprising:

Determining, according to the received file read request, a file index corresponding to the client, where the file index has a correspondence relationship with a file block that the client can access; a block, and the file in the file block Data is sent to the client.

A file indexing service device, wherein the file indexing service device is the file indexing service device according to any one of claims 9 to 15.

18. A file indexing service device, wherein the file indexing service device comprises:

a request processing unit, configured to determine, according to the received file read request, a file index corresponding to the client, where the file index has a correspondence relationship with a file block that the client can access; A file block corresponding to the file I is read, and file data in the file block is sent to the client.