JPH02212965A - Program loading system - Google Patents

Abstract

PURPOSE:To reduce the overhead of the loading time of a transaction processing program by controlling the loading of the transaction processing program so as not to be repeated when the transaction processing program corresponding to an inputted transaction ID is loaded beforehand. CONSTITUTION:When the transaction ID is inputted from a user terminal 16, a CPU 15 decides whether the transaction processing program corresponding to that transaction ID is loaded before in a program loading area or not according to a program loading area control table 13. If this transaction processing program is loaded beforehand, the loading of it is not newly performed, but transaction processing is executed by using the transaction processing program loaded beforehand. Thus, the overhead of the loading time of the transaction processing program is reduced.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a program loading method, and in particular, the present invention relates to a program loading method, and particularly to
ion) () Identifier for identifying Ranzaxiran)
Relates to a program loading method in a transaction processing system in which a transaction processing program corresponding to a transaction HD is loaded from an auxiliary storage device to a program load area on main memory when a transaction HD is input, and after the loading is completed, the F-Ran transaction processing program is executed. .

[Conventional technology]

Conventionally, in this type of program loading method, when a transaction ID is input from a user terminal, the input of the transaction ID means an instruction to start the transaction processing program corresponding to the transaction HD. Even if the same transaction processing program as the corresponding transaction processing program has already been loaded into the program load area in main memory, if there is a free program load area in main memory, the transaction processing program will be unconditionally loaded from the auxiliary storage. was loaded and running.

In this case, it is determined whether there is a free program load area or whether all program load areas are in use, and if all program load areas are in use, the program is loaded in an empty state. Processing is in progress to place the transaction in a wait state until an area is available.

(Problems to be Solved by the Invention) In the conventional program loading method described above, when a transaction ID is input from a user terminal, the transaction processing program corresponding to the transaction fD has already been loaded into the program load area on the main memory. Even if the transaction processing program is This method has the disadvantage that different program load areas are forced to be used overlappingly depending on the program.

In view of the above-mentioned points, an object of the present invention is to provide a program loading method that reduces the overhead of loading time of a transaction processing program and prevents duplicate use of a program load area on main memory.

[Means to solve the problem]

The program load method of the present invention includes a program load area control table that stores the transaction ID of the transaction processing program loaded in the corresponding program load area, and a transaction ID when the transaction ID is input from the user terminal. It is determined based on the program load area control table whether the transaction processing program corresponding to the transaction processing program has already been loaded in the program load area, and if the transaction processing program has already been loaded, the transaction processing program is not loaded again. A CPU (C.

rhtral Proc@ssing Unit)
and has.

[Effect]

In the program loading method of the present invention, the program load area wi control table stores the transaction ID of the transaction processing program loaded in the corresponding program load area, and the CPU receives the transaction ID when the transaction ID is input from the user terminal. Determine whether or not the transaction processing program corresponding to transaction 10 has already been loaded into the program load area based on the program load area control table, and if the transaction processing program has already been loaded, load the transaction processing program anew. Transaction processing is executed using the transaction processing program that has already been loaded.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the program loading method of the present invention. The device 17 is configured to include a device 17.

The main memory 11 includes a program load area 12, a program load area control table 13, and a terminal side door table 14.

Referring to FIG. 2, the program load area 12 includes a transaction processing program code section load area 21,
Transaction processing program data division load area 22
It has

Referring to FIG. 3, the program load area control table 13 includes the number of program load area users 31 and transaction ID 3 corresponding to each program load area 12.
2.

Referring to FIG. 4, the terminal control table 14 stores the program load area ID 41 (program load area 12 which is the copy source to the data copy area 42) corresponding to each user terminal in the user terminal group 16. ID) and
Data part copy area 42 (the data part of the transaction processing program corresponding to transaction 10 input from the corresponding user terminal is in the program load area 1)
2).

Next, the operation of the program loading method of this embodiment configured as described above will be explained.

When a transaction ID is input from any user terminal in the user terminal group 16, the CPU 15 performs the following processing.

First, based on the transaction ID 32 in each program load area control table 13 indicating the transaction processing program loaded in each program load area 12 on the main memory 11, the corresponding transaction processing program (corresponding to the input transaction 10) It is determined whether a transaction processing program (transaction processing program) is loaded into any of the program load areas 12 and whether there is a program load area control table 13 having the same transaction ID 32 as the manually input transaction ID.

If the corresponding transaction processing program is already loaded in any of the program load areas 12 in this determination, the program load area indicates the number of user terminals using the program load area 12! l11
1'a table 13 (program load area control table 13 corresponding to the program load area I2), add 1 to the number of program load area users 31, and execute the transaction processing program (mode of execution of the transaction processing program) (will be discussed later).

If the corresponding transaction processing program is not loaded in any of the program load areas 12 in the above determination, the program load area in which the number of program load area users 31 in the corresponding program load area igm table 13 is 0. 12 exists.

In this determination, if there is a program load area 12 in which the number of program load area users 31 is O in the corresponding program load area 3, the corresponding transaction processing program is transferred from the auxiliary storage device 17 to the program load area 12. and execute the transaction processing program after loading.

If there is no program load area 12 in which the number of program load area users 31 in the corresponding program load area 13 is 0 in the above-mentioned determination, one of the program load area areas 2 becomes vacant (the corresponding The transaction is placed in a waiting state until the number of program load area users 31 in the program load area control table 13 becomes 0.

When the execution of any transaction processing program is completed in the process as described above, the CPU 15 uses the program load area in the program load area control table 13 corresponding to the program load area 12 in which the transaction processing program is loaded. Subtract 1 from the number of participants, 31. As a result, if the number of program load area users 31 becomes 0, it means that the program load area 12 corresponding to the program load area control table 13 in which this number of program load area users 31 exists has been released (became free). Therefore, if there is a transaction waiting for the program load area 12 to become free at this point, the CPLJ 15 stores the auxiliary storage value 'l117 in the released program load area 2.
Then, the transaction processing program related to the transaction is loaded, and after the loading is completed, the transaction processing program is executed.

Note that when executing the transaction processing program, the CPU'is performs the following processing.

That is, as described above, the transaction processing program is loaded into a predetermined program load area 12 on the main memory II (the code part in the transaction processing program is loaded into the transaction processing program code part load area 21, (The data portion is loaded into the transaction processing program data 7 portion load area 22).

At this time, in consideration of the fact that the same transaction processing program is shared by multiple user terminals, the transaction processing program data section load area 2
2 to the data section copy area 42 of the terminal control table 14 (the terminal control table 14 corresponding to the user terminal where the transaction TD was input to start the transaction processing program).
The program load area 41 in the terminal w control table 14 stores the ID of the program load area 12 having the copy source transaction processing program data section load area 22).

This makes it possible to update the data section of the transaction processing program individually by each of multiple user terminals (different program load areas 12
It is possible to update the data section in the same way as the method in which the transaction processing program is used redundantly by the same transaction processing program (the method of the prior art), and the code section of the transaction processing program is executed simultaneously by multiple user terminals. (The transaction processing program operates as if it were independent for each user terminal.)

〔Effect of the invention〕

As explained above, the present invention provides a method for processing a transaction processing program corresponding to a transaction ID input from a user terminal when the transaction processing program corresponding to the transaction ID has already been loaded into the program load area on the main memory. By controlling the loading of transaction processing programs so that they are not duplicated, it is possible to reduce the load time overhead of the transaction processing programs (faster transaction processing response), and to avoid duplicate use of the program load area. It has the effect of disappearing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the program load area in FIG. 1, and FIG. 3 is a diagram showing the configuration of the program load area control table in FIG. FIG. 4 is a diagram showing the configuration of the terminal control table in FIG. 1. In the figure, 11... Main memory, 12... Program load area, 13... Program load area control table, 14...
- Terminal control table, 15...CPU. 16... User terminal group, 17... Auxiliary storage device, 21... Transaction! 22... Transaction processing program data section load area, 31... Number of program load area users, 32... Transaction fD. 41...Program load area 10°42...Data copy area.

Claims (1)

[Scope of Claims] A program load area control table that stores transaction IDs of transaction processing programs loaded in corresponding program load areas; It is determined based on the program load area control table whether the transaction processing program is already loaded in the program load area, and if the transaction processing program is already loaded, the transaction processing program is already loaded without being loaded again. 1. A program loading method comprising: a CPU that executes transaction processing using the transaction processing program.