JP2663600B2 - Control table relocation processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Regarding relocation processing such as addition and deletion of computer control tables, dynamically relocating control tables while business operations of computers are in progress The purpose of the control table relocation processing method is to enable the specification of the control table group held in the computer by specifying the necessity of the continuous area, the necessity of address storage, and the size of the area for each control table of the control table group. In the case where the control table group is rearranged according to an attribute list having the attribute list and a predetermined designation, the control unit refers to the attribute list and determines whether or not the contiguous area is necessary only for the control table having a designation not requiring the address storage. And processing means for executing the reallocation by performing a required layout change in accordance with the designation of, and generating a required free area. The computer keeps the processing means while continuing other business processing. To be executed before other processes It is formed.

[Industrial applications]

The present invention relates to a control table relocation processing method for performing relocation processing such as addition and deletion of a control table of a computer during operation.

[Problems to be solved by conventional technology and invention]

As for the input / output devices constituting the computer system, information necessary for control of each input / output device is collectively held in a control table group including various control tables, and the input / output processing program is used for processing. For this purpose, reference is made to the necessary control table entry corresponding to the required input / output device.

Each of these control tables has a specific format. For convenience of processing, all items must be placed in a storage area (continuous area) where addresses are continuous, and a certain minimum area is used as a unit. Some of the divided storage areas are good.

In the operating system of a computer, a group of control tables corresponding to the system configuration is generated by so-called system editing under the above-described restrictions of each control table, and these control tables are stored in a main memory at the start of operation. Load and run.

Some of these control tables are linked by holding an address for another control table in a certain control table, and during operation, a program that refers to the control table includes:
In the control area of the program, there is one that stores an address related to a necessary control table and associates it with the control table. Do not change the layout of control tables.

In the computer system, an input / output device is frequently added, and the control table group corresponding to the above-mentioned control table group is frequently added. Since the arrangement of the control tables cannot be changed during operation as in the above, the system must be stopped and the control table group must be re-edited.

For this reason, in a system that operates on a 24-hour basis in principle, there is a problem that it is not possible to increase the number of input / output devices unless there is an opportunity to stop the system, for example, on a regular system maintenance day.

An object of the present invention is to provide a control table relocation processing method capable of dynamically relocating a control table while business operation of a computer is continued, while the operation is continued.

[Means for solving the problem]

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

FIG. 1 shows a configuration of a control table relocation processing method. Reference numeral 1 denotes a relocation control mechanism that executes relocation processing based on control table update information 3 of a control table group 2 by referring to an attribute list 4.

(Operation)

For the control table group 2 held in the computer, an attribute list 4 is provided which has the necessity of a continuous area, the necessity of address storage, and the designation of the area size for each control table of the control table group 2.

When relocating the control table group 2 based on the control table update information 3 which is predetermined designation information, the relocation control mechanism 1 which is a relocation processing means refers to the attribute list 4 and stores the address. Relocation is performed only for those control tables for which no designation is required by performing necessary arrangement change in accordance with the designation of continuous area necessity and generating a necessary free area.

For this reason, the computer is configured to continue the other business processing and execute the relocation control mechanism 1 prior to the other processing.

According to the above processing method, the linkage of the control table group before the relocation is completely saved until after the relocation according to the definition by the attribute list, so that the control table group is not stopped during the business operation without stopping the system. Can be rearranged.

〔Example〕

In FIG. 1, control table update information 3 is generated by the above-described system editing function. For example, regarding an input / output device to be added, additional element information of a control table to be added to the control table group 2 and a control table group to be rearranged And so on.

The attribute list 4 is configured, for example, as shown in FIG. 2. For each type of various control tables constituting the control table group 2, the area flag in the attribute column indicates whether the area requires a continuous area or can be divided. Whether or not the address flag needs to store the address for the coordination is determined by a flag value of 1
And 0. The size column defines the overall size of each type of control table and the size of the minimum area where division is possible (shown in parentheses in the figure).

The relocation control mechanism 1 is started by giving a computer a sufficiently higher priority than other normal processing, and is realized by a special program executed in an interrupt prohibited state if necessary.

FIG. 3 shows an example of the processing flow of the relocation control mechanism 1. First, in step 10, a current area of the control table designated for address storage in the control table group 2 is secured, and in step 11, other addresses are stored. After the control tables that do not need to be saved are temporarily saved, each additional element of each control table whose continuous area is designated by address saving is added in processing step 12 by allocating the subsequent area following each control table. If the area cannot be added due to insufficient area, a new area is acquired.

In processing step 13, it is determined whether or not the processing of all the preceding additional elements has succeeded, and if successful, the remaining area is sequentially allocated to the control table and the remaining additional elements saved in processing step 14, and if the area is insufficient , A new storage area is acquired, and an area is allocated to all control tables to form a new control table group.
After that, in the processing step 15, the attribute list 4 is updated to the contents of the new control table group, and the processing ends.

If the addition of the additional element in the processing step 12 is unsuccessful, that is, because another address storage specification control table is located close to the address storage specification control table in the continuous area specification, If there is no space large enough to add an additional element after the control table, the process branches from processing step 13 to processing step 16 to output, for example, a message indicating that relocation is impossible, The processing is terminated while leaving the group 2 as it is.

FIG. 4 is a diagram showing an example of rearrangement by such processing. In the figure, A to D are types of control tables, a1 to d1 are their elements, and a control table group 20 made up of these is called a control table. Additional elements indicated by a2 to d2 are added to the update information 21 and rearranged. The attributes of each control table are A, D: continuous area, address storage unnecessary B: division possible, address storage unnecessary C: continuous area, address storage required.

In this case, first, the area of the C control table for address storage designation is secured as before, and then the additional element c2 is added.
Next, an area including an additional element is allocated from the original area while considering whether the area is a continuous area in the order of the A, B, and D control tables,
The missing area is added, and rearrangement is performed, for example, as shown as a new control table group 22.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, in the rearrangement processing such as addition and deletion of the control table of the computer, the control table is dynamically reloaded while the operation is continued during the business operation of the computer. There is a significant industrial effect that the arrangement can be made.

[Brief description of the drawings]

 FIG. 1 is a block diagram showing a configuration of the present invention, FIG. 2 is an explanatory diagram of an attribute list, FIG. 3 is a flowchart of a process of the present invention, and FIG. In the figure, 1 is a relocation control mechanism, 2 and 20 are control table groups, 3 and 21 are control table update information, 4 is an attribute list, 10 to 16 are processing steps, and 22 is a new control table group.

Claims (1)

(57) [Claims] 1. An attribute list (2) for a control table group (2) held in a computer, which specifies whether a continuous area is required for each control table in the control table group, whether to store an address, and a size of an area. 4) and when the control table group (2) is rearranged by a predetermined specification (3), the control table having a specification that does not require the address storage is referred to by referring to the attribute list (4). Only about
A processing means (1) for executing the reallocation by performing a required layout change according to the designation of the necessity of the continuous area and generating a required free area is provided, and the computer continues other business processing. A control table rearrangement processing method characterized in that the processing means is configured to be executed prior to other processing.