JPH04117546A - Communication control system - Google Patents

Abstract

PURPOSE:To share a file in a communication control system by attaining a constitution where a file server receives the returned updated block, code and updated information respectively and at the same time storing again only the updated block based on the updated information. CONSTITUTION:A client 2 sends a file transfer request to a file server 1 via a network 3. The server 1 receives the request and sends the corresponding file to the client 2. The client 2 receives the file and returns this file to the server 1 via the network 3 after updating the file. Thus the server 1 stores again the returned file. Thus a single server 1 can attain the connection of many clients and the file is effectively used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication control method, and particularly to a communication control method for transferring updated files.

[Conventional technology]

Conventionally, in this type of communication control method, a client issues a file request to a file server, the file server sends the requested file to the client, and the client receives the sent file and updates the file. In some cases, even if a part of the file was updated, the file server database returned all of the updated files.

Additionally, the file server received the returned files and re-stored all of the files.

[Problem to be solved by the invention]

In the conventional communication control method described above, when each client updates a file stored on a file server, as the number of clients increases, it becomes difficult to communicate and store all the contents of the target file. As a result, data transfer over the network increases, slowing down file update processing and reducing efficiency. In some cases, it may be necessary to prepare another file server and divide the network. The drawback is that files cannot be shared.

[Means to solve the problem]

The communication control method of the present invention reads a file stored in a file server in response to a request from a fiant, divides the file into blocks of a certain length, assigns a code to each block, and divides the file into blocks of a certain length. A means for transmitting all the assigned codes to the client, and the client receives all the transmitted blocks and codes, updates the blocks, adds update information to the updated blocks, and updates the blocks. and means for returning only the code and update information corresponding to the block to the file server; and the file server receives the returned update block, the code, and the update information, and also receives the update information. and means for restoring only the updated block.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

The client 2 sends a file transfer request to the file server 1 via the network 3, and the file server 1 receives the transfer request and transfers the corresponding file to the client 2. The client 2 receives the transferred file, updates the file, and then sends it back to the file server 1 via the network 3. The file server 1 re-stores the returned file.

FIG. 2 is a schematic diagram illustrating the operation when updating a file in one embodiment of the present invention.

Now, suppose that the client 2 makes a file transfer request to the file server 1. (101) First, the file server 1 reads the stored file.

(102) Next, the read file is divided into blocks of a certain length, a block number is assigned to each block, and the block number and all the divided blocks are sent to the client 2.

(103) The client 2 receives all the block numbers and divided blocks sent from the file server 1.

(104) As a result of performing information processing on the received file, the client 2 extracts a block to be updated, performs the update, and then creates update information. Next, the updated block, block number, and update information are sent back to the file server 1 as a set.

(105), (10B) The file server 1 determines the storage location of the updated block based on the returned block number and update information, and re-stores only the updated block. Therefore, other blocks that are not subject to update remain in their original storage locations and are not updated.

〔Effect of the invention〕

As explained above, the present invention not only allows files to be re-stored effectively without reducing file transfer efficiency no matter how many clients update files on a single file server. This has the effect of allowing many clients to be connected with , - file servers and making efficient use of files.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating the operation when updating a file in one embodiment. 1...File server, 2...Client, 3.
··network.

Claims (1)

[Claims] In a communication control method for information processing equipment that transfers data via a network, upon receiving a request from a client, a file stored in a file server is read out, the file is divided into blocks of a certain length, and each block is coded. a means for assigning a block and transmitting all the divided blocks and the assigned code to the client, and the client receives all the transmitted blocks and codes, updates the block, and sends update information to the updated block. means for returning only the updated block with the addition of , a code corresponding to the block, and updated information to the file server; A communication control system comprising means for re-storing only the update block based on the update information.