JPH08235048A - Network file processing method and system - Google Patents

Abstract

PURPOSE: To process the whole of plural network files by means of an applica tion program like in a case of a single network file. CONSTITUTION: Receiving a file access instruction, a network file processing part 2 retrieves a catalog file 4 based on the file name that is designated by the received instruction. If the designated file name is real one, the part 2 has an access to this file by an access instruction via a file server 12, etc., including the file. If the designated file name is the logical one, the part 2 starts a logical file processing part 3. The part 3 retrieves an extension catalog file 5 based on the file name designated by an instruction. Then the part 3 has accesses by an access instruction to plural existing files constructing a file of the relevant logical name via the corresponding file server 12, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network file processing method and a network file processing method, and more particularly to a network having a logical file function for logically processing a plurality of network files existing on a network system. A file processing method and the same processing method.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing an example of a conventional network file processing method. A sales file 6 for branch A on the network system and a sales file 7 for branch B on the network system. , File 8 of Y branch existing on the network system, sales file 9 of Z branch existing on the network system, application program 11 and file server 1 of A branch.
2, the file server 13 of the B branch, the file server 14 of the Y branch, the file server 15 of the Z branch, the conventional network file processing unit 16 and the catalog file 17 are shown.

FIG. 7 shows an example of the structure of the catalog file 17. In this file, all file names existing in the network system and the file server number indicating which file server connected to the network system exists are also registered.

FIG. 8 shows a network file processing unit 16
3 is a flowchart showing the operation of FIG.

Next, the operation will be described in the case where the application program 11 refers to the sales file 6 of the A branch existing on the network system in the network system configured as described above.

The application program 11 must open the sales file 6 of the A branch before processing. The open command is issued by specifying the network file name "A branch sales file". The network file processing unit 16, which is one element of the OS that has received the issued open command, refers to the catalog file 17 shown in FIG. 5 (step 81 in FIG. 8), and the file server in which the A branch sales file 6 exists. Know the number and sales file for branch A 6
Is opened (step 82) and the application execution result is notified to the application program 11.

After the completion of the open command, the application program 11 starts the reading processing of the sales file for branch A. Upon receiving the read command issued by the application program 11, the network file processing unit 16 reads a record from the opened A branch sales file (step 83) and notifies the read record together with the execution result.

The application program 11 can read all the records in the file by repeatedly executing the read command for the A branch sales file 6 until a file end error occurs.

Further, when the sales information of all the branches is obtained, the application program 11 processes the A branch sales file 6 and then the B branch sales file 7 because the network file is distributed for each branch. Then, similarly, the processing is repeated up to the Z branch sales file 9 to obtain the sales information of all the branches.

[0010]

In the above-mentioned conventional network file processing method, when processing is performed on all of a plurality of network files distributed on the network, the network file 1 distributed on the network for each application program is used. Processing has to be performed for each one, and there is a drawback that the design man-hour of the program increases and the processing efficiency is poor.

Further, there is a problem that the application program must be changed every time the number of distributed network files increases.

[0012]

According to a first aspect of the present invention, the real file names of all the files that actually exist in the network system, the file server number of the file server in which the files exist, and the plurality of existing files are logically defined. First, the logical file name of the logical file merged with was registered
Of the catalog file, the real file names of the plurality of existing files forming the logical file indicated by the logical file name, and the file server number of the file server in which the existing file exists are stored in association with each other. Prepare the second catalog file in advance,
When the file access command to the file is received, the first catalog file is searched by the file name specified by the command, and if the file name specified by the command is the actual file name, the real file name is used. Access processing by the access command is performed on the indicated file via the file server in which the file exists,
When the file name specified by the command is the logical file name, the plurality of files forming the file indicated by the logical file name are searched by searching the second catalog file by the file name specified by the command. The present invention is characterized in that an access process according to the access command is performed on an existing file through the file server in which the file exists.

The second aspect of the present invention is that the actual file names of all the files that actually exist in the network system, the file server number of the file server in which the files exist, and a logic that logically merges the plurality of existing files. A first catalog file in which a logical file name of a file is registered, the real file names of the plurality of existing files that form the logical file indicated by the logical file name, and the file server in which the existing files exist A second catalog file that stores the file server number of the first catalog file in association with each other, and when an access command to the file is received, the first catalog file is searched by the file name designated by the command. When the file name specified by the command is the actual file name, the actual file name is The file indicated by the file name is accessed by the access command through the file server in which the file exists, and a logical file access instruction is output if the file name specified by the command is the logical file name. And a plurality of network file processing units configured to form a file indicated by the logical file name by searching the second catalog file with the file name designated by the command in response to the logical file access instruction. A logical file processing unit that performs access processing according to the access command via the file server in which the file exists is provided.

[0014]

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

FIG. 1 shows a network according to an embodiment of the present invention.
It is a block diagram of a file processing system, application program 1
Exists on the network system, a network file processing unit 2 which is one element of the OS, a logical file processing unit 3 which is one function of the network file processing unit 2, a catalog file 4, and an extended catalog file 5. Sales file 6 for branch A, sales file 7 for branch B on the network system, sales file 8 for branch Y on the network system, and sales file 9 for branch Z on the network system.
, A logical file 10 created by logically merging sales files from A branch to Z branch, a file server 12 of A branch, a file server 13 of B branch, a file server 14 of Y branch, File server 1 of Z branch
5 is shown.

FIG. 2 shows an example of the structure of the catalog file 4. In this file, all network file names existing in the network system and logical file names obtained by logically merging a plurality of network files are all registered. Each file name has a logical file ID indicating whether it is an existing network file or a virtually created logical file, OFF indicates a real file, and ON indicates a logical file. It is shown that. Further, in the case of a real file, a file server number indicating which file server connected to the network system exists is also registered.

FIG. 3 shows an example of the structure of the extended catalog file 5. This file is a file that manages the logical file names registered in the catalog file. The multiple existing network file names that make up the logical file and the file server number that indicates which file server exists. And are associated and registered.

FIG. 4 is a flow chart showing the operation of the network file processing unit 2, and FIG. 5 is a flow chart showing the operation of the logical file processing unit 3.

Next, in the system configured as described above, the operation of this embodiment is divided into a case where one distributed network file is referred to and a case where a plurality of distributed network files are referred to as a logical file. Describe.

When referring to the A branch sales file 6 that actually exists in the network system, the application program 1 opens the A branch sales file 6 before processing, so an open command is issued with the actual file "A branch sales file". To do. The network file processing unit 2, which is one element of the OS that has received the open command, refers to the catalog file 4 shown in FIG. 2 (step 61 in FIG. 4),
Since the logical file ID of "A branch sales file" is OFF (step 62), "A branch sales file"
Knows the file server that actually exists in the network system, and opens the A branch sales file 6 (step 63) and displays the command execution result as the application program 1.
Notify to All the processing instructions for the A branch sales file 6 from the opened application program 1 are processed by the network file processing unit 2.

On the other hand, even if the sales data of all the branches are distributed and stored for each branch, according to the present invention, the application program 1 is similar to the A branch sales file 6 existing in the network system. It is possible to make 26 network files from the A branch sales file 6 to the Z branch sales file 9 with the same description as when referring to a single network file. That is, the application program 1 issues an open command to the all-branch sales file 10 which is a logical file obtained by merging 26 files for 26 branches from the A-branch sales file 6 to the Z-branch sales file 9. Then, the network file processing unit 2 refers to the catalog file 4 (step 61).

In the catalog file 4, as shown in FIG. 2, a logical file name "all branch sales file" and a logical file ID are set in advance.

In the network file processing unit 2, since the logical file ID is set to ON, the open command is delivered as it is to the logical file processing unit 3 in the network file processing unit 2 (step 64).

The logical file processing unit 3 refers to the extended catalog file 5 shown in FIG. 3 (step 7 in FIG. 5).
1), "all branch sales file" is file server number 0
A branch sales file 6 existing in 00, B branch sales file 7 existing in the file server number 001, ...
Y branch sales file 8 existing in the file server number 024, and Z existing in the file server number 025
Knowing that the branch sales file 9 consists of 26 network files, an open command is executed for each of the 26 network files (step 7).
2) Notify the application program 1 of the execution result.

After that, the application program 1 may perform processing on a single file called the sales file for all branches. All the read commands for the records issued from the application program 1 are executed by the logical file processing unit 3 in the network file processing unit 2, and whether the sales file for each of a plurality of branch offices actually existing in the network system is one file. Process. Therefore, the logical file processing unit 3 performs the following processing.

The read instruction of the first record issued from the application program 1 is executed for the A branch sales file 6 which is the first actual file registered in the extended catalog file 5 (step 73). afterwards,
All record read commands issued from the application program 1 are executed for the A branch sales file 6.
However, if all the records in the A branch sales file 6 are read and there are no more records to be read next, the logical file processing function is the actual file registered next to the extended catalog file 5, and the B branch sales file. The file 7 is executed (step 74). All subsequent read commands for records issued from the application program 1 are executed on the B branch sales file 7.

Similarly, while there are records to be read in the network file from which the records are being read, an instruction is executed for that file, and when there are no more records to be read, they are registered in the extended catalog file 5. Read the record from the next actual file. However, the extended catalog
The execution result indicating that there are no more records to be read in the last real file registered in the file (Z branch sales file 9 in this embodiment) is notified.

As described above, in the network file processing method having the logical file processing function according to the present embodiment, even when processing an existing network file on the network system, a plurality of existing network files are logically processed. When processing files that have been merged dynamically, a command is issued to the network file processing unit, which is a function of the OS, and in the application program, whether the opened file is a single network file or multiple network files. This has the effect of eliminating the need to be aware of whether or not it is.

[0029]

As described above, according to the present invention, when a large amount of data is distributed and stored in a plurality of network files for data preservation, the application program stores the entire plurality of network files. Even if it is a processing target, it can be processed as if it is a single network file, so it can be created without any change from an application program for a single existing network file. This has the effect of improving the design man-hours and processing efficiency of the program.

Further, even if the number of distributed network files increases, there is an effect that the application can be continued without any modification.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram of a catalog file 4 in FIG.

FIG. 3 is a configuration diagram of an extended catalog file 5 in FIG.

FIG. 4 is a flowchart showing an operation of the network file processing unit 2 of FIG.

5 is a flowchart showing the operation of the logical file processing unit 3 of FIG.

FIG. 6 is a configuration diagram showing an example of a conventional technique.

7 is a diagram showing a configuration example of a catalog file 17 of FIG.

FIG. 8 is a flowchart showing an operation of the network file processing unit 16 in FIG.

[Explanation of symbols]

 1, 11 Application program 2, 16 Network file processing unit 3 Logical file processing unit 4, 17 Catalog file 5 Extended catalog file 6 A branch sales file 7 B branch sales file 8 Y branch sales file 9 Z branch sales file 10 All branch sales file 12 A branch file server 13 B branch file server 14 Y branch file server 15 Z branch file server

Claims (2)

[Claims] 1. A real file name of all files actually existing in the network system, a file server number of a file server in which the file exists, and a logical file name of a logical file obtained by logically merging the plurality of existing files. A registered first catalog file, the real file names of the plurality of existing files that form the logical file indicated by the logical file name, and the file server number of the file server in which the existing files exist. A second catalog file to be stored in association with is prepared in advance, and when an access command to the file is received, the command is specified by searching the first catalog file with the file name specified by the command. If the file name is the actual file name, it is indicated by the actual file name. The file is accessed by the access command through the file server in which the file exists, and when the file name specified by the command is the logical file name, the file name specified by the command is used. Performing an access process by the access command via the Fife server in which the files exist, to the plurality of existing files forming the file indicated by the logical file name by searching the second catalog file. Network file processing method characterized by: 2. The actual file names of all files actually existing in the network system, the file server number of the file server in which the files exist, and the logical file name of the logical file obtained by logically merging the plurality of existing files. A registered first catalog file, the real file names of the plurality of existing files that form the logical file indicated by the logical file name, and the file server number of the file server in which the existing files exist. A second catalog file to be stored in association with the first catalog file is provided in advance, and when an access command to the file is received, the first catalog file is named by the file name designated by the command.
If the file name specified by the command is the actual file name by searching the catalog file of the above, the access command is issued to the file indicated by the actual file name via the file server in which the file exists. A network file processing unit that performs access processing and outputs a logical file access instruction when the file name specified by the command is the logical file name, and a file name specified by the command upon receiving the logical file access command The access processing by the access command is performed on the plurality of existing files forming the file indicated by the logical file name by searching the second catalog file via the Fife server in which the file exists. And a logical file processing unit for performing Ttowaku file processing system.