JPS5844264B2 - Data set processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data set processing method in a computer system.

When storing a Fortran or Cobol program or processing data created on paper by a programmer on an external storage device, that is, when creating a lease program or editing a text data set, the edit command is used. It is carried out by

There is also a method of editing datasets using cards as a medium, but in TSS (Time Sharing System) editing is performed while talking to a computer using commands from a terminal, so editing cannot be done using cards.

If the editing work in the TSS is to be made more efficient, the response time of signal exchange between the CPU (central processing unit) and the terminal becomes a problem.

That is, if this response time is shortened, the efficiency of the editing work will naturally be further improved.

Therefore, an object of the present invention is to propose a data set processing method that can shorten the response time and further improve the efficiency of editing work.

In accordance with the above object, the present invention is characterized in that one of the features of the present invention is to eliminate unnecessary input/output operations among the input/output operations required for editing work, thereby substantially shortening the input/output time. In particular, this paper focuses on input/output operations between a buffer allocated to the main memory connected to the CPU and an external storage device (Dust) as unnecessary input/output operations.

Another purpose is to reduce the data search time when reading and writing data in the buffer and dust.

The present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a system implementing a time sharing system (hereinafter referred to as TSS).

In the figure, 1 is a central processing system, 2 is a communication control processing unit, 3 is an input/output device for center operators, 4 is an input/output device for TSS users connected by a communication line, and 5 and 6 are directly connected to the central processing system. 7 is an interface control unit for interfacing the TSS user with internal functions of the central processing system; 8 is a unit that controls the operation of various functions within the central processing system; 9 is an input/output device for the TSS user; Part that receives instructions from the center operator, 10
is a TSS control monitoring unit, 11 is a TSS control unit, 12 to 14
15 is the TSS user space, 15 is an address control section, 16 is an identification section for each input/output device and the contents to be processed by the operator, 17 is a section related to the control of each person's blade device, 18
19 is a command processor which is a part related to a program created by a user; 19 is a relative address control unit; and 20 is a group of files connected to the central processing system.

Normally, data or instructions from each of the input/output devices 4 to 6 are processed in the central processing system 1 using a file group 20 by the operation of each functional part.

The invention relates therein to the command processor 18.

Programs such as Fortran and data created by the operator are provided to the command processor 18 through the input/output devices 3 to 6.

Of course, it is also possible for the operator to modify these programs and data using an input/output device, and this is also done using TSS commands.

Therefore, if the given program or data is in file group 2
If it is stored in a file 0, the command processor reads the necessary portion from the file and performs various processing.

FIG. 2 is a diagram illustrating a processing method of a conventional command processor.

In the figure, 21 indicates an external data (user program and data) set file used exclusively by the command processor to perform its functions, 22 indicates the contents of the main memory existing in the central processing system 1, and 23 to 25 indicate buffers. , 26 are control tables.

The command processor stores external data sent (user programs and data) given from the input/output device in a file 21.

Now, a case will be described in which processing is performed on an external data center based on a command given from an input/output device.

If it is from a TSS user (via communication control processing if necessary), it is given to the command processor 10 via the interface control unit 7.

The command processor issues a request to the relative address control unit 19 in order to secure the buffer shown in FIG. 2, that is, a low area necessary for processing.

(This request is called a format write.

), and the buffer is allocated to the command processor.

This relative address is registered in the control table 26.

This control table 26 stores information indicating the size of the buffer and how much the buffer is used (size of area used).

That is, in the conventional system, when a buffer is required for processing, the relative address control unit 19 is first notified (that is, a format write is performed) to secure a buffer associated with the storage area of the file 21.

When the buffer area is filled with data sets from TSS users, it is detected in the control table and controlled to move (transfer) the data sets onto a file.

In such a conventional method, whenever a buffer area is secured, a storage area on a file is also secured, and there are many processes that do not necessarily require a storage area on a file, resulting in inefficient use of the storage area of a file.

In addition, even if you take the time to secure the area,
This is wasted time if the file is not used.

FIG. 3 is a diagram showing an embodiment of the present invention.

In the figure, the same symbols as in FIG. 2 indicate the same things as in FIG. 2, 27 indicates a control table according to the present invention, and 28 to 31 indicate buffers.

In the present invention, buffers 28 and 29 are used for file 2
Although it is associated with the storage area above 1, buffer 30
and 31 are not associated.

The control table 27 contains buffer numbers instead of relative addresses.

In FIG. 3 as well, the buffer is secured in response to a notification from the TSS user, but at this time, the storage area on the file is not secured at the same time as in the prior art.

Then, when the buffer is being used and the buffer is filled, the relative address control unit is notified (that is, a format write is performed) and the storage areas on the file are associated with each other.

Of course, this operation is unnecessary if the data can be lost.

That is, according to the present invention, securing a buffer does not require securing a storage area on a file, so it can be done in a short time.

Furthermore, for processes that do not require storage space on a file, the storage space on the file is not reserved at the same time as the buffer, so the storage space on the file is not secured unnecessarily, and the file size is reduced accordingly. This has the advantage that it can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a system to which the present invention is applied, FIG. 2 is a diagram showing a conventional system, and FIG. 3 is a diagram showing a system of the present invention. In the figure, 18 is a command processor, 9 is a relative address control unit, 21 is a file, a control table, and 28
-31 are buffers. 27 is

Claims (1)

[Claims] 1. When editing a data set using the main storage device 22 and the file 21, the data set is not allocated to the file 21 at first, but only the buffers 30 and 31 allocated in the main storage device 22 are used. The data set processing method is characterized in that the data set is edited by the user, and the data set is allocated to the file 21 only when the data set can no longer be accommodated in the buffers 30 and 31. 2. The data set processing method according to claim 1, in which format writing is performed simultaneously when writing the data set to the file 21.