JPH01113831A - Load module replacement system in on-line mode - Google Patents

Abstract

PURPOSE:To perform the replacement processing and the call processing at high speed by transcribing the contents of a program control file to a load control area set in a main memory at replacement in an open processing state. CONSTITUTION:When an on-line is opened, a load control area 16 and a changeover switch area 23 are secured in a main memory via an open processing part 18. Then the contents of a program control file 15 and a replacement instruction file 22 are transcribed to both areas 16 and 23 respectively. When a call request is received, the presence or absence of a replacement instruction is decided by reference to the file 22. When the presence of the replacement instruction is confirmed, a corrected load module 60b is replaced and called out. While the call processing is carried out by reference to the load information on the main memory when the absence of the replacement instruction is confirmed. Thus the processing speed is increased with a load module replacement system.

Description

[Detailed Description of the Invention] [J Already Required] The present invention relates to a replacement method for replacing a load module that is called while online, and a process for the replacement method that calls and requests a load module with logic 10 and replaces it with a modified load module. For the purpose of improving speed, the first load information, which is composed of the physical 10 of the load module, a swap flag whose logic is inverted for each swap instruction, and the initial value of the load destination entry point address data, corresponds to the logical 10. A program management file filed as a file, a replacement instruction file with a replacement switch, and a logic I to be replaced
A swap instruction processing unit that updates the physical 10 of the program management file and the swap flag based on D and the physical 10 of the modified load module, and counts up the swap switch, and a load control area and a swap switch area on the main memory when online is opened. an open processing unit that transfers the first load information and the replacement instruction file by securing the same, and an open processing unit that transfers the replacement instruction file to the replacement switch area when requested to be called based on logic 10, and compares the replacement switch before and after the transcription. A replacement instruction determination unit that determines whether or not there is a replacement instruction, and a second load information posted to the load control area based on logic 10 that was instructed when there was no replacement instruction, and when entry point address data is set. Control is transferred to that address, and when there is no setting, a load module is loaded based on the physical ID, and the notified entry point address data is set in the second load information, and the call process is performed to transfer control, and when there is a replacement instruction a call processing unit that replaces the first load information whose replacement flag does not match the second load information with the second load information, clears the entry point address data, and performs the call processing; 10, the program management file is transferred to the main memory to perform the calling process, and each time a calling request is made, the replacement instruction file is referred to, and when there is a replacement instruction, the first program management file that has been replaced is Configure to transfer load information and replace load modules.

[Industrial application field]

The present invention relates to a load module replacement method while online.

In financial systems, etc., the center device and each terminal are connected online during business hours, and data input from the terminal is accepted at any time, and real-time processing is performed to immediately execute specified data processing and response of processing results. It is being said.

There are many types of business processing required from this terminal, such as deposit/withdrawal processing, two brother book updates, etc., and there are many shared parts, so each business program is divided into subprograms.
Therefore, each of them is registered as a load module in the load module library and is configured to be called at any time.

In an online processing unit (online program) composed of a large number of load modules, when it becomes necessary to modify a load module, it is desired to replace it with a modified load module while online. A module replacement method is required.

[Conventional technology]

FIG. 9 is an explanatory diagram of a conventional load module replacement method. In the figure, 1 is a plurality of online terminals connected to the center device via communication lines, etc., and 2 is the main control unit of the center device, which connects online with the online terminal 1 during business hours and receives input from time to time. It requests the load module (subprogram) 60 to perform predetermined processing based on the data, and responds to the online terminal 1 with the processing results.

A, B...D are load modules 60 that execute predetermined processes. For example, load module A is a subprogram called by the main control unit 2 to update the ledger, and load module B is called during that process. call,
Load module B is configured to further call load module C, and so on, to sequentially call subprograms to execute predetermined processing.

In the above online system, when modifying a certain load module 60, a modification load module 60b is created and replaced, but conventionally, control is used to specify whether to replace it after the job is completed or to branch to the modification load module 60b. A system is adopted in which a table 5 is provided and a replacement routine 6 is incorporated at the beginning of each load module A to D, which refers to the table 5 and determines whether to branch to the modified load module 60b or execute its own routine.

The load module 60 is registered as a subprogram in the load module library, and if it is not loaded when called, it is loaded into the main memory and operated.

[Problem that the invention seeks to solve]

As explained above, the replacement of load modules in an online system is performed after the end of a job, or by incorporating a replacement routine into each load module.

However, with the former method, even if a fault is detected in a load module, it cannot be corrected until the end of the job, and with the latter method, there is a limit on the number of replacements based on the control table setting method, and furthermore, the replacement routine is applied to each load module. Therefore, there was a problem in that the load module itself could not be replaced.

Therefore, the load module is requested to be called using the logical identifier data (logical 10) as a parameter, and the logical ID
and a physical ID to call the called load module based on the program management file,
One possible method is to update the physical ID of this program management file and replace the load module, but even though the replacement process is rare, it is necessary to access the program management file with a large amount of load information for each call. However, there is a problem that the processing speed decreases.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an online load module replacement method that improves processing speed in the above-described method of requesting a call using a logical ID.

[Means for solving problems]

The online load module replacement method of the present invention, as shown in FIG. flag(
53) and the load destination entry point address data (
54) and the initial value of the first load information (50
) is filed corresponding to the logical identifier data (51), a program management file (15), and a swap switch (5) that is counted up for each swap instruction.
5), the logical identifier data (51) of the specified replacement target, and the physical identifier data (52b) of the modified load module (60b).
Based on this, the corresponding physical identifier data (52) of the program management file (15) and the replacement flag (53)
and an exchange instruction processing unit (17) that updates the exchange switch (55) and counts up the exchange switch (55).
) and an exchange switch area (23) to respectively transfer the first load information (50) and the exchange switch (55) of the exchange instruction file (22); When requested to call using the logical identifier data (51) as a parameter, the contents of the swapping instruction file (22) are transferred to the swapping switch area (23), and the swapping switch (55) before and after the transcription is compared. A replacement instruction determination unit (1) determines whether there is a replacement instruction based on mismatch or coincidence.
9), and the logical identifier data (5) specified when there is no replacement instruction.
1), the second load information (50a) transferred to the load control area (16) is referred to, and if the entry point address data (54) is set, the entry point address data (54) is set. If the control is not set, the factory load module (60) is loaded based on the corresponding physical identifier data (52), and the notified entry point address data (54) is set as the second load information. When there is a replacement instruction, the first load information whose replacement flag (53) does not match the second load information is extracted from the first load information and used as the second load information. and a call processing section (20) that performs the above-mentioned call processing by replacing and clearing the entry point address data (54).

[For production]

The first load information 50 consists of physical identifier data (Physical 10) 52 that identifies the load module 60, a replacement flag 53 whose logic is inverted for each replacement instruction, and load destination entry point address data 54. Prepare the program management file 15 arranged based on the logical ID) 51, and when replacing the load module 60, replace the physical ID 52 corresponding to the logical 1051 to be replaced and update the replacement flag 53 (° "0" →“
°l” or “1” → “0”).

In addition, in order to notify the replacement, a predetermined bit replacement switch 5
A replacement instruction file 22 consisting of 5 files is provided, and a replacement switch 55 is counted up when a replacement instruction is given.

When opening online, the open processing unit 18 stores the load control jI area 16 and exchange switch area 23 on the main memory.
are secured, and the contents of the program management file 15 and replacement instruction file 22 are respectively transcribed.

When requested to be called by an online task, the swap switch 55 of the swap instruction file 22 is moved to the swap switch area 2.
3 and compared with the old exchange switch in the exchange switch area before transcription. If they match, it is determined that there is no exchange instruction, and when they do not match, it is determined that there is a replacement instruction.

When there is no replacement instruction, the load control area 16 (second load information 50a) is referred to and the call process is performed, that is, if the entry point address data 54 is set, control is transferred to that address, and if it is not set (LOW ADRESS,
clear) Instructs the physical ID 52 to load the operating system OS, and also displays the second load information 50
The entry point address data 54 of a is set and control is transferred to that address.

When there is a replacement instruction, the first load information 50 of the program management file 15 and the second load information 50a transferred to the load control area 16 are all compared, and the first load information 50 with the replacement flag 53 that does not match is checked. After extracting and replacing with the second load information 50a and clearing the entry point address data 54 of the replaced second load information 50a, the above-mentioned calling process is performed.

As described above, when a call request is made, the replacement instruction file 22 is referred to to determine whether there is a replacement instruction, and if there is a replacement instruction, the modification load module 60b is replaced and called, and if there is no replacement instruction, the modification load module 60b is replaced and called. The call process is performed by referring to the load information on the main memory.

〔Example〕

Embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 2 is a block diagram of the online processing unit of the embodiment, Fig. 3 is an explanatory diagram of module replacement instruction processing, Fig. 4 is an explanatory diagram of LCA contents, Fig. 5 is an open processing flowchart, and Fig. 6 is a close processing flowchart. 7 is a call processing flowchart (part 1), and FIG. 8 is a call processing flowchart (part 2).

FIG. 2 shows a program management unit 14 in which the open processing unit 18, replacement instruction determination unit 19, call processing unit 20, and close processing unit 21 shown in FIG. be. In the figure, reference numeral 11 is the main control unit, which performs the opening process of various files in the initial settings, connects online to the online terminal, and instructs the program management unit 14 to perform the open process, and after the open process, outputs from the online terminal. It receives input data based on a read request, calls the business processing management section 12, requests predetermined processing, and responds with the processing results to the online terminal.

Reference numeral 12 denotes a business processing management section that checks input data transmitted from an online terminal, sequentially calls load modifiers 60 corresponding to predetermined processing, and returns to the main control section 11 with the processing results.

Reference numeral 60 denotes a load module as a subprogram, which further performs predetermined processing by calling a subprogram.

14 is a program management section, and an open processing section 18. .

Replacement instruction determination unit 19. Call processing unit 20. A close processing section 21 is provided.

18 is an open processing unit which, when an open processing instruction is issued from the main control unit 11, stores a load control area L on the main memory.
C^16 and the exchange switch area 23 are secured, and the first load information 50 of the program management file 15 and the exchange switch 55 of the exchange instruction file 22 are transferred.

Reference numeral 19 denotes a replacement instruction determination unit which, when receiving a call request, transfers the replacement switch 55 from the replacement instruction file 22 to the replacement switch area 23, compares it with the old replacement switch held up until then, and determines whether there is a match or mismatch. It is determined whether there is a replacement instruction (absent when there is a match).

Reference numeral 20 denotes a call processing unit that performs call processing, which will be described later, based on the logical ID.

21 is a close processing section.

15 is a program management file in which the first load information 50 is filed based on the logical ID 51 as shown in FIG. The data 54 stores an initial value (no setting).

16 is a load control N-area LCA provided on the main memory, and as shown in FIG. A storage area is allocated.

Reference numeral 17 denotes a module replacement instruction processing unit, which replaces the physical ID 52 of the current load information 8 of the program management file 15 based on the physical ID 52b of the corrected load module 60b created and registered in the load module library and the logic 1051 to be replaced. At the same time, the exchange switch 55 of the exchange instruction file 22 is switched (+1).

22 is a replacement instruction file in which a multi-bit replacement switch 55 is stored.

23 is an exchange switch area provided on the main memory.

The first load information 50 of the program management file 15 is the initially registered load information that is replaced by the replacement process, and the second load information 5a is the first load information 50 transferred to the LCA 16. The same data name has the same code.

The operation will be explained below.

Note that the main control unit 11 and the business processing management unit 12 request the program management unit 14 to call the logic 1051 as a parameter.

(Replacement instruction processing) See Figure 3 Replacement instructions are given online.

(1) The modified source program is compiled and generated as a modified load module 60b, and has a physical ID 52b.
The load module library number is also registered.

(2) When the logical 1051 and physical ID 52b to be replaced are instructed from a terminal (not shown), the module replacement instruction processing unit 17 sends the replacement switch 5 of the replacement instruction file 22.
In addition to counting up 5, the logical ID to be replaced
Physical ID of program management file 15 corresponding to 51
is replaced with the physical ID 52b of the modified load module 60b, and the replacement flag 53 is updated (“0” → “1”).
” or “1” → “0”).

(Open processing) See FIG. 5. When receiving an open processing instruction, the open processing section 18 secures a load control area LC^16 and a swap switch area 23 in the main memory, and transfers the contents of the program management file 15 and swap instructions. The contents of the file 22 are transcribed.

(Replacement instruction determination) FIG. 7(a) When a call request is received, the contents of the replacement switch area 23 are saved to another area, and the replacement switch 55 of the replacement instruction file 22 is transferred to the replacement switch area 23.

Next, the old and new exchange switches 55 are compared, and if they match, it is determined that there is no exchange instruction, and when they do not match, it is determined that there is an exchange instruction.

As described above, even if a replacement instruction is given at any time while online, it can be detected at the time of a call request.

(Call processing) Figures 7 and 8 (1) When there is no replacement instruction, convex control area LCA
16 to perform the calling process. FIG. 8(c) That is, read the second load information 50a corresponding to the instructed logic 1051, and if the entry point address data 54 is set, transfer the control to that address, and (d) read the entry point address data. If 54 is not set (clear), the physical 1052 is specified and the operating system O8 is requested to load it, and after setting the notified entry point address data 54 to the second load information 50a, control is transferred to that address. . (E) (2) When there is a replacement instruction, the program management files 15 are sequentially read and the first
The load information 50 of the load control area LCA 16 is compared with the corresponding second load information 5a of the load control msM area LCA 16, and all the first load information 50 whose replacement flags 53 do not match are transferred to the load control area LCA 16. Update. (b) The entry point address data 54 of the second load information 50a replaced at this time is cleared.

(3) After the above update process, the call process in item (1) described above is performed. (c) As a result of the above, the load modules corresponding to the logical TDs 52 whose replacement flags 53 do not match are replaced.

(Close processing) Refer to Figure 6 Based on the close processing instructions given at the time of online opening, the load control area LCA 16 and the exchange switch area 23
and open up.

As described above, by providing the program management file 15 in which the logical 1051 and the physical 1052 are provided, the load module 60 can be replaced at will. Since the management file 15 is configured to be read and updated, fewer file accesses are required and replacement and call processing can be performed at high speed.

〔Effect of the invention〕

The present invention provides a program management file in which logical 10, physical 10, and replacement flags are made to correspond to each other, and performs load module replacement processing while online. Replacement processing was performed because the configuration was configured to transfer the contents of the program management file to the control area.

Call processing is performed at high speed, which has a great effect on the online system.

[Brief explanation of the drawing]

Figure 1 is a diagram explaining the principle of the present invention, Figure 2 is a block diagram of the online processing unit of the embodiment, Figure 3 is a diagram explaining module replacement processing, Figure 4 is a diagram explaining contents to LC, Figure 5 is open Processing flowchart, Fig. 6 is a close processing flowchart, Fig. 7 is a call processing flowchart (part 1), Fig. 8 is a call processing flowchart (part 2), and Fig. 9 is an explanation of the conventional load module replacement method. Figure, is. In the figure, 11 is the main control unit, 12 is the business processing management unit, 14 is the program management unit, 15 is the program management file, 16 is to the load control area LC, 17 is the replacement instruction processing unit, 18 is the open processing unit, 19 20 is a replacement instruction determination unit, 20 is a call processing unit, 21 is a close processing unit, 22 is a replacement instruction file, 23 is a replacement switch area, 50 is first load information, 50a is second load information, 51 is a logical identifier 52 is physical identifier data, physical ID, 53 is a replacement flag, 54 is entry point address data, and 55 is a replacement switch.

Claims (1)

[Claims] A load module replacement method during online operation in which a load module registered in a load module library and called by an online processing unit to execute a predetermined process is replaced with a modified load module during online operation, comprising: Consists of physical identifier data (52) that identifies the load module (60), a replacement flag (53) whose logic is inverted for each replacement instruction, and the initial value of the load destination entry point address data (54) on the main memory. First load information (5
A program management file (15) in which 0) is filed corresponding to the logical identifier data (51), and a replacement switch (5) that is counted up for each replacement instruction.
5), the program management file (15) based on the logical identifier data (51) of the instructed replacement target and the physical identifier data (52b) of the modified load module (60b). ) and a replacement instruction processing unit (17) that updates the corresponding physical identifier data (52) and the replacement flag (53) and increments the replacement switch (55); Control area (16
) and an exchange switch area (23) to respectively transfer the first load information (50) and the exchange switch (55) of the exchange instruction file (22); When requested to call using the logical identifier data (51) as a parameter, the contents of the swapping instruction file (22) are transferred to the swapping switch area (23), and the swapping switch (55) before and after the transcription is compared. A replacement instruction determination unit (1) determines whether there is a replacement instruction based on mismatch or coincidence.
9), and the logical identifier data (5) specified when there is no replacement instruction.
1), the second load information (50a) transferred to the load control area (16) is referred to, and if the entry point address data (54) is set, the entry point address (
54), and if it is not set, the load module (54) is transferred based on the corresponding physical identifier data (52).
60) and sets the notified entry point address data (54) as the second load information to transfer control, and when there is a replacement instruction, the second load information of the first load information is loaded. Load information and replacement flag (53
) extracts the mismatched first load information and replaces it with the second load information, and also extracts the entry point address data (54).
a call processing unit (20) that clears and performs the call processing;
and requests the call of the load module (60) using the logical identifier data (51), and the program management file (1).
5) to the main memory and performs call processing,
Each time a call request is made, the replacement instruction file (22) is referred to, and when there is a replacement instruction, the program management file (22) is referred to.
15) A load module replacement method during online, characterized in that the first load information subjected to replacement processing is transferred and the load module (60) is replaced.