JP2630215B2 - Method of deleting unnecessary file data while online - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deleting unnecessary file data during online operation, and more particularly to a method for deleting unnecessary file data when online business operation is continuously performed for a long time.

[0002]

2. Description of the Related Art When online business operations are continuously performed for a long time, unnecessary online files are deleted by a conventional method.
) Was directly deleted.

[0003]

In the conventional method as described above, it may take a relatively long time from the start of online file deletion to the completion of the online file deletion. Therefore, there is a problem that the online file is occupied and one business task is occupied for the deletion business. Also, if it is determined that certain data is no longer needed for online work, the data is deleted before the operator's decision is made.Therefore, there is a case where the deleted data is used for another batch work. There was a problem that it could not be used even if there was.

An object of the present invention is to solve the above-mentioned problems in the conventional method and to provide a method of deleting unnecessary data in an online file which can delete unnecessary data in an online file without hindering an online operation. It is intended to be.

[0005]

According to the method of deleting unnecessary file data in online according to the present invention, a message of a deletion job is registered in a job registration file in file units, and the job management task reads out the message and reads the message. Assigned to business tasks in units, delete the unnecessary records for the assigned business tasks, and if this execution time becomes longer, suspend the execution and re-register the message of the suspended deleted business in the business registration file. did. The re-registered message is read out later and assigned to the task, and the deletion task is executed from the next record at the time of interruption. By doing so, it is possible to prevent the online business from being interrupted for a long time. Also, since the message of the deletion job is registered in the job registration file by input from the operator, if the operator wants to use the data for the batch job in the deletion file, it can be saved to another memory. it can.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of the present invention. In the drawing, a command receiving operation 1, a business management task 3, and a business task 4 represent functions configured by program control by a computer. And the online file 5 are stored in a magnetic disk or the like which is an external memory of the computer. The computer has a main memory (not shown) composed of a RAM, and the work registration file 2 and the online file 5 are read out to the main memory and used for a period in which they are used.

When a certain file of the online file 5 is read into the main memory and is used for an online task by a certain task task 4 and the contents of the file are required during the online task, the file is stored in the main memory. After rewriting and completing the online business, it is stored on the original disk. Prior to the storage, a record indicating that the record is unnecessary in the online business is tagged with the record indicating that the record is unnecessary. When writing new data in an online file, the date of creation of the data is added.

In the present invention, the deletion of unnecessary data in the online file is started by a command input by the operator. For example, a command to delete unnecessary data for all online files and a command to specify a file name and delete unnecessary data for the specified file are input. When the operator wants to use certain data in a file that has become unnecessary in the online job in a batch job, the operator can save the data to another memory before inputting a command for deleting unnecessary data.

The command accepting job 1 receives such a command, edits the message of the deleting job for each target file (or for all files when no file is specified), and registers it in the job registration file 2. . The message of the job that the command receiving job 1 receives and registers in the job registration file 2 is not limited to the message of the deletion job, but the messages of other jobs are not directly related to the present invention, and the description thereof will be omitted.

The business management task 3 is a business registration file 2
Is read and sent to the associated task 4. Each task task 4 executes the task specified by the message sent from the task management task 3, but upon receiving the message of the deletion task, reads the online file 5 having the file name specified by the message into the main memory. It is determined whether each record is a record to be deleted. This determination is made using an unnecessary marker added to the record, the number of days elapsed since the date of creating the data, and the like, but the record that is no longer required by this determination is deleted.

The file from which unnecessary records have been deleted is moved from the main memory to the original disk. The information is also stored in order to inform an OS (operating system) which address (physical address) in the disk has become free. Start of unnecessary data deletion work to prevent online business from being stopped for a long time, online files being occupied for a long time, and business tasks being occupied for a long time due to unnecessary data deletion work Business task 4 starts with other online
In consideration of the average transaction processing time
After a specified time elapses, the deletion operation is suspended.
Upon this interruption, the deletion message of the file is re-registered in the business registration file 2. At the time of this re-registration, information for accessing the record to be read and determined next is added and re-registered. Then, the reregistered message is read by the task management task 3 and processed by the task task 4.

[0012]

As described above, according to the present invention, each task can be sequentially executed while interrupting the deletion task by using the task registration file, which greatly hinders the online task. Without long-term occupation of online files and business tasks can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

[Explanation of symbols]

 1 Command reception business 2 Business registration file 3 Business management task 4 Business task

Claims (3)

(57) [Claims] (1)Finger of the message registered in the business registration file
Multiple business tasks that process the tasks
In an online system that has  File to be deleted by command input by operator
Identify and edit the deletion business message for each target file.
Command reception task to register in the task registration file, read the message registered in the task registration file,
If the message is for a deletion job, the message is
Business management task to be assigned, the business to which the deletion business message was assigned from the business management task
Task to read the file targeted by the message.
Each record in the read file
To determine whether the record is unnecessary data
Delete records determined to be unnecessary by useless record determination means and unnecessary record determination means
Unnecessary record deletion means, and the unnecessary task determination means in the business task.
Unnecessary record deletion meansAfter running for a predetermined timeSuspend,
To access the next record at the time of the interruption
Information message and delete business message for the file
An online file unnecessary data deletion method, comprising: interruption means for re-registering in the business registration file. 2. The message of the above-mentioned deletion work is transmitted by an operator.
Initially for each online file or collectively
Registered Te, the unnecessary record determination unit, the number of days from the date of creation of the label or the record to display an unnecessary the record is added to the record when it becomes unnecessary in the online processing, the record is not required 2. The online file unnecessary data deletion method according to claim 1, wherein it is determined whether or not there is a file. 3. The predetermined time from the start of the deletion operation until the execution of the suspending means is the same as that of another online operation.
2. The online file unnecessary data deleting method according to claim 1, wherein the setting is made in consideration of the order processing time .