JPH0458343A - Control system for shared use of file - Google Patents

Abstract

PURPOSE:To improve the processing efficiency for control of the shared use of a file by registering the file control information that is not retrieved for a long time into a file control information recording file and the file control information that is frequently retrieved into a memory up-queue. CONSTITUTION:When a file where a certain job is not used by any job is used exclusively or sharedly for the first time, the corresponding file control information is registered in the end of a memory up-queue 4. Meanwhile the corresponding file control information is moved to the end of the queue 4 from this queue 4 or a file control information recording file 5 when a certain job is used by another job or its own job. When the number of pieces of file control information stored in the queue 4 exceeds the number decided by a system, the file control information that is not retrieved for the longest time in the queue 4 is moved to the file 5. Thus the input/output frequency is reduced to the file 5 and the processing efficiency is improved for control of the shared use of the file.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a file sharing usage control method, and in particular to a file sharing method for sharing files between different or the same jobs in a computer system (hereinafter simply referred to as the system). Concerning usage control methods.

[Conventional technology]

Information that manages files used by a certain job at a certain point in time (hereinafter referred to as file management information) is registered in memory or in a specific file (hereinafter referred to as file management information recording file). File management information corresponding to a file that is not even used is not registered in the memory or in the file management information recording file. When a certain job newly uses a file exclusively or in a shared manner, the system searches the file management information corresponding to the file to recognize whether the file is already in use and performs file sharing usage control. . A search for file management information is first performed on the memory, and then within the file management information recording file. The above technique is the basis of a file sharing usage control scheme that is common to both the prior art and the present invention.

By the way, in the conventional file sharing usage control method, when a file that is not being used by any job at a certain point in time is used for the first time in some job, the number of files being used by some job at that point is determined by the system. If the number is less than the specified number, the file management information corresponding to the file being used for the first time is registered in the memory, and if not, it is registered in the file management information recording file. And, unless the current file is released by all the jobs that use it, the file management information registered in the file management information recording file will remain registered in the file management information recording file and will remain in memory. The file management information registered in was still registered in memory.

Therefore, if a file whose corresponding file management information is registered in memory has been used for a long time in a job, and the number of file management information in memory has reached the number specified by the system. If the file is used for the first time, the file management information corresponding to the file is not registered in the memory, but is registered in the file management information recording file.

So when you later use that file for shared use,
Since the file management information corresponding to the file is not registered in the memory, the file management information recording file must be searched. It is good if a file whose corresponding file management information is registered in memory is newly shared and used frequently, but if this is not the case, file management information that is rarely searched is registered in memory. Since frequently searched file management information is registered in the file management information recording file, the number of inputs and outputs to the file management information recording file increases, and the efficiency of the file sharing usage control process deteriorates.

[Problem to be solved by the invention]

In the conventional file sharing usage control method described above, the file management information registered in the file management information recording file remains registered in the file management information recording file, and the file management information registered in the memory is not stored in the memory. If frequently searched file management information is registered in the file management information recording file, the number of inputs and outputs to the file management information recording file will increase, resulting in file sharing usage control. This has the disadvantage that processing efficiency deteriorates.

In view of the above-mentioned points, an object of the present invention is to increase the probability that frequently searched file management information is registered in memory, reduce the number of inputs and outputs to a file management information recording file, and reduce the number of inputs and outputs to a file management information recording file. An object of the present invention is to provide a file sharing usage control method that improves the efficiency of control processing.

[Means to solve the problem]

In the file sharing usage control method of the present invention, file management information required for shared use of files by different or the same jobs is partially registered in the memory and partially in the file management information recording file. , File management in a computer system that searches file management information in order to recognize whether a file is already being used by another job or the own job when a job newly uses a file exclusively or in a shared manner. An in-memory queue that registers information as a queue in memory up to the number determined by the computer system, and a file that corresponds to the file used when a job uses a file that is not used by any other job exclusively or for the first time. Management information is registered at the end of the memory queue, and when the job in question shares a file that is already being used by another job or its own job, the management information is registered at the end of the memory queue or the file management information recording file. The registered file management information is moved to the end of the memory queue, and if the number of file management information in the memory queue exceeds the number determined by the computer system, the registered file management information is moved to the beginning of the memory queue. and a file sharing usage control mechanism that moves the file management information of the file to the file management information recording file.

[Effect]

In the file sharing usage control method of the present invention, an in-memory queue registers file management information in memory as a queue up to the number determined by the computer system, and a job with a file sharing usage control mechanism is used by any job. When using a file that is not available for the first time exclusively or coexisting, the file management information corresponding to the file to be used is registered at the end of the memory queue, and the job in question shares the file that is already being used by another job or by its own job. When doing so, the file management information already registered in the memory queue or file management information recording file is moved to the end of the memory queue, and as a result, the number of file management information in the memory queue is determined by the computer system. If the number exceeds the number, the file management information at the head of the memory queue is moved to the file management information recording file.

〔Example〕

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

FIG. 1 is a block diagram showing the configuration of a file sharing usage control system according to an embodiment of the present invention.

The file sharing usage control system of this embodiment is composed of jobs 1 and 2, a file sharing user side 1HjlJ, a structure 3, a memory queue 4, and a file management information recording file 5.

From jobs 1 and 2, file allocation requests 6 and 7 are output to the file sharing usage control mechanism 3.

The memory queue 4 is a queue in which file management information is registered in the memory up to the number determined by the system.

Next, the operation of the file sharing usage control method of this embodiment configured as described above will be explained.

Assume that Job 1 is trying to secure a file necessary for executing Job 1, and that file is not being used by any job at that time. At this time, the job 1 makes a file allocation request 6 to the file sharing usage control mechanism 3.

The file sharing usage control mechanism 3 makes a file allocation request 6
Then, the memory queue 4 and file management information recording file 5 are searched in this order to see if file management information corresponding to the file is registered. In this case, since the file in question is not used by any job, the file management information corresponding to the file is not registered in either the memory queue 4 or the file management information recording file 5, and the file sharing usage control The mechanism 3 registers the file management information corresponding to the file at the end of the memory queue 4.

As a result, if the number of file management information in the memory queue 4 exceeds the number determined by the system, the file sharing usage control mechanism 3 records the file management information at the head of the memory queue 4. Move to file 5.

Next, assume that Job 2 is trying to secure a file necessary for executing Job 2, and that file is being used by Job 1 at that point. At this time, the job 2 makes a file allocation request 7 to the file sharing usage control mechanism 3.

The file sharing usage control mechanism 3 sends a file allocation request 7
Then, the memory queue 4 and file management information recording file 5 are searched in this order to see if file management information corresponding to the file is registered. In this case, since the file is used for job 1, the file management information corresponding to the file is registered in either the memory queue 4 or the file management information recording file 5, and the file sharing usage control mechanism 3 moves the file management information corresponding to the file to the end of the memory queue 4. As a result, if the number of file management information in the memory queue 4 exceeds the number determined by the system, the file sharing usage control mechanism 3 records the file management information at the head of the memory queue 4. Move to file 5.

In this way, file management information that has not been searched for a long time is registered in the file management information recording file 5, and filed management information that has been searched frequently is registered in the memory queue 4. Therefore, it is possible to increase the probability that the file management information is registered in the memory queue 4 when searching for the file management information.

〔Effect of the invention〕

As explained above, the present invention stores file management information corresponding to the file to be used for the first time at the end of a queue in memory when a certain job uses a file that is not used by any other job for the first time exclusively or in a shared manner. When a job registers and shares a file that is being used by another job or its own job, the file management information corresponding to the shared file is stored in the memory queue or from the file management information recording file. If the number of file management information in the memory queue exceeds the number specified by the system, move the file management information that has not been searched for the longest time in the memory queue to the file management information recording file. By doing this, when searching for the file management information corresponding to the file in order to share the file, the file management information is registered in the memory queue instead of in the file management information recording file. This has the effect of increasing the probability that the files will be used, reducing the number of inputs and outputs to the file management information recording file, and increasing the efficiency of file coexistence use control processing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a file sharing usage control system according to an embodiment of the present invention. In the figure, (1) 2.Job, 3.File sharing usage control mechanism, 4.Memory queue 5.File management information recording file, 6.7.File allocation request.

Claims (1)

[Claims] File management information necessary for different or the same jobs to share a file is registered partly in memory and partly in a file management information recording file,
In a computer system that searches for file management information in order to recognize whether or not the file is already being used by another job or the own job when a job newly uses a file exclusively or in a shared manner, file management information is An in-memory queue that registers files in memory up to a number determined by the computer system as a queue, and a file management system that corresponds to the file used when a job uses a file that is not used by any other job exclusively or shared for the first time. The information is registered at the end of the memory queue, and when the job in question shares a file that is already being used by another job or its own job, the information is already registered in the memory queue or the file management information recording file. If the number of file management information in the memory queue exceeds the number determined by the computer system, the file management information stored in the memory queue is moved to the end of the memory queue. A file sharing usage control method comprising: a file sharing usage control mechanism that moves file management information to the file management information recording file.