JPH01232432A - Program modification system - Google Patents

Abstract

PURPOSE:To improve the quality of online service by running programs in an old program and a new program in a program file in parallel and performing switching from the old program to the new program successively. CONSTITUTION:This system is constituted including a process control block 11, an executable program decision function 12, an old program control table 13, a new-old entry address contrast table 14, and the program file 15. Then programs in the old program 16 and new program 17 which are arranged double in the program file 15 are run in parallel and the switching from the old program to the new program is carried out by an online system successively. Consequently, the online system need not be stopped at the time of the modification of the program and processes being performed are not reduced, thereby improving the quality of the online system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program change method, and particularly to a program change method in an online system (online computer system) that should not be stopped, such as an online system of an electronic exchange.

[Conventional technology]

Conventionally, this type of program change method (a program change method in which part of the program executed on an online system is replaced during operation of an online system in which multiple processes, which are units of parallel program processing, can exist at the same time) Among them, the program change method that targets the online system of electronic exchanges, etc.) involves temporarily stopping a part of the online system (which should not be stopped) and changing the program from the old program to the new program. The initial settings of the online system were performed by restart processing after the program was changed, and then the operation of the online system based on the new program was resumed.

[Problem to be solved by the invention]

In the conventional program change method described above, the program is changed after the online system is temporarily stopped. The disadvantage is that the service will be temporarily suspended and the quality of online services will deteriorate.

In addition, since the initial settings of the online system are performed by the restart processing after the program change, the processes that were running before the program change will disappear, and the online service that was in operation before the program change will disappear. The disadvantage is that it may be invalidated and the quality of online services will be reduced.

In view of the above-mentioned points, an object of the present invention is to provide a program that can improve the quality of online services in an online system by eliminating the need to stop the online system and eliminating running processes when changing programs. The purpose is to provide a change method.

[Means to solve the problem]

The program change method of the present invention is a program in which an old program that has already been incorporated into an online system and is in operation is the target of the change, and a new program that is newly incorporated into the online system in place of the old program. A file, an old program management table that has information that identifies whether or not the issued program and startup program are included in the program change target in the program file, and a startup process that uses the startup program included in the program change target. A new program usable flag indicating whether the startup program in the new program can be used in place of the startup program in the old program in the program file, the entry address of each program in the old program, and the new program. A new and old entry address comparison table having comparison information with the entry address of each corresponding program, and a new and old entry address comparison table showing whether each process is a process using a program in the old program in the program file. If a process control block having a display flag and an old program and a new program are placed twice in the program file, and then the issuing process generates the startup process, the issuing program is included in the program change target. It is determined whether the issuing process is using the issuing program in the old program based on the old program management table and the old/new display flag in the process control block of the issuing process, and based on this determination, the issuing program is used. If the issuing process is included in the program change target and the issuing process is using the issuing program in the old program, check whether the startup process can be run using the startup program in the new program or not in the old and new entry. Judgment is made based on the new program usable flag in the address comparison table. If it is determined that the startup process cannot be run using the startup program in the new program, the startup program in the old program is used as the startup process. information indicating that the program in the old program is being used is set in the new/old display flag in the process control block of the startup destination process; otherwise, the old entry address is determined by referring to the old/new entry address comparison table. The startup program in the new program based on the conversion from to the new entry address and any startup program in the tiI area in the program file other than the old program and the new program are used for the startup destination process. The program has a runnable program determination function that sets information indicating that the old program is not used in the new/old display flag in the process control block of the process.

[Effect]

In the program change method of the present invention, an old program that is already installed and operating in an online system and is the target of the change, and a new program that is newly installed in the online system in place of the old program are placed in the program file at the same time. The old program management table has information that identifies whether or not the issued program and startup program are included in the program change target in the program file, and the old and new entry address comparison table uses the startup program included in the program change target. A new program usable flag indicating whether the target process to be launched can use the startup program in the new program instead of the startup program in the old program in the program file and the entry address of each program in the old program. and comparison information with the entry address of each corresponding program in the new program, and the process control block determines whether each process is a process using the program in the old program in the program file. The runnable program determination function detects whether the issuing program is changed when the issuing process creates the startup process after the old program and new program are placed twice in the program file. Based on the old program management table and the old/new display flag in the process control block of the issuing process, it is determined whether or not the issuing process is using the issuing program in the old program. is included in the program change target and the issuing process is using the issuing program in the old program, the new and old entries indicate whether the startup process can be run using the startup program in the new program. Judgment is made based on the new program usable flag in the address comparison table. If it is determined that the startup process cannot be run using the startup program in the new program, the startup program in the old program is used as the startup process. information indicating that the program in the old program is being used is set in the new/old display flag in the process control block of the startup destination process.Otherwise, the old entry address is used by referring to the new/old entry address comparison table. The process of the destination process uses either the startup program in the new program based on the conversion to the new entry address or the startup program in the area of the program file other than the old program and the new program for the startup destination process. Information indicating that the program in the old program is not used is set in the old/new display flag in the control block.

〔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 change method of the present invention. Table 13, old and new entry address comparison table 14, and program file 1
5.

The process control block 11 is created for each process, and includes old and new display flags.

The old program management table 13 exists for each one or more programs to be changed (program change targets) existing in a continuous area in the program file 15. ) 16, and a tail address that indicates the end address of the old program 16.

The old and new entry address comparison table 14 exists for each program to be changed, and includes the old entry address indicating the entry point address of the program in the old program 16 in the program file 15, and the new program (program) in the program file 15. A new entry address indicating the address of the entry point of the changed program for the program in (one or more changed programs) 17 added to a continuous area in the program file I5 corresponding to the change target, and It has a new program usable flag indicating whether or not a program after modification of the program in the program 17 can be used.

The program file 15 is composed of an old program 16 and a new program 17 arranged in duplicate at the same time.

Referring to FIG. 2, the runnable program determination function 12
The processing includes an issuing process determination step 21, an issuing program determination step 22, a starting program determination step 23, an old/new entry address conversion step 24, a new/old display flag setting step 25, and a new/old display flag old setting step 25. It consists of step 26.

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

When a program is changed in an online system such as an online system of an electronic exchange that is assumed to operate 24 hours a day (full-time), a new program 17 is first added to the program file 15 at the beginning of the program change, and the new program 17 is added to the program file 15 every time the program is changed. old program management table 1
3 is created, and a new and old entry address comparison table 1 is created for each program in the old program 16 that is the target of program change.
4 is created, and the old/new display flag in the process control block 11 for the process running at that time is set to "old" (in FIG. 1, there is only one process control block 11 and one old/new entry address comparison table 14). Although only the old program management tables 13 are shown, in reality, there are as many processes as there are programs and as many programs as the old programs 16. When there are multiple program change targets, multiple old program management tables 13 exist.

After a series of processes as described above, the program file 1 is determined based on the determination by the runnable program determination function 12.
The programs in the old program 16 and the new program 17 in 5 are run in parallel, and the old program 1
Switching from program 6 to new program 17 is performed as follows.

In other words, the new program 17 is added to the program file 15.
Creation of the startup process by the issuing process after the issuance process is added (the process that is the unit of parallel processing of the program in the program file 15 is created by the already running process. The process inside is called the "publisher process," and the process generated by the issuer process is called the "starter process." If this is done), the issuing process is determined based on the new/old display flag in the process control block 11 of the issuing process (whether the new/old display flag in the process control block 11 of the issuing process is "new" or not). "old") is performed (step 21).

If the new/old display flag in the process control block 11 of the issuing process is "1 old" in this issuing process determination, the issuing program (program used by the issuing process) is determined based on the old program management table 13.
is included in the program change target (Issuing program judgment. If the start address of the issuing program given to the issuing process when the issuing process was created is the head address in the old program management table 13. and the tail address) is performed (
Step 22).

If the issuing program is included in the program change target in this issuing program judgment, the issuing program is the program to be changed, but the issuing optical process uses the program in the old program 16 instead of the program in the new program 17. Therefore, the new program usable flag (handover information (parameter) from the issuing program in the old program 16 to the starting program in the old program 16) in the new and old entry address comparison table 14 corresponding to the startup program It indicates whether or not the program in the new program 17 can be used as a startup program based on whether there is any change between the issuing program in the old program 16 and the handover information to the startup program in the new program 17. Based on the information), it is determined whether the startup program should be one of the old programs 16 or the new programs 17 (startup program determination) (step 23).

Note that if the startup program is not included in the program change target and the new/old entry address comparison table 14 corresponding to the startup program does not exist, this startup program determination is not performed.In this case, the process control block 11 of the startup process The new/old display flag in the program file 15 is set to "new" and the old program 1 in the program file 15 is displayed.
6 and the new program 17 are activated.

If the program in the new program 17 can be started as a startup program in this startup program determination, the new entry address is calculated from the old entry address based on the old and new entry address comparison table 14 corresponding to the startup program ( The old entry address is switched to the new entry address) (step 24), the old and new display flag in the process control block ll of the startup source process is set to "new" (step 25), and the startup program in the new program 17 is started. be done.

New program 17 in step 23 startup program judgment
If the program in the old program 16 cannot be started as the startup program, the old/new display flag in the process control block 11 of the startup source process is set to "old" (step 26), and the startup program in the old program 16 is set to "old" (step 26). is started.

If the issuing program is not included in the program change target in step 22, the new entry address is calculated from the old entry address based on the old and new entry address comparison table 14 corresponding to the startup program (step 24); The new/old display flag in the process control block 11 of the startup source process is set to "new" (
Step 25), the startup program in the new program 17 is started (if the startup program is not included in the program change target and the old and new entry address comparison table 14 corresponding to the startup program does not exist, the process control of the startup source process The new/old display flag in block 11 is set to "new", and the activation programs in the area other than the old program 16 and new program 17 in the program file 15 are activated).

In the issuer process determination in step 21, the new/old display flag in the process control block 11 of the issuer process is “new”
If so, the new/old display flag in the process control block ll of the startup destination process is set to "new" (step 25), and the startup program in the new program 17 is started (the startup program is subject to program change). If not included, a startup program in an area other than the old program 16 and new program 17 in the program file 15 is activated).

Process file 1 is created by the processing and determination described above.
The programs in the old program 16 and the new program 17 in 5 are run in parallel, and the old program 1
6 to the new program 17, and when the old and new display flags in the process control block ll for all processes are set to "new", the old program 16 is switched to the new program 17.
The process using the program inside no longer exists,
The program change using the program change method of this embodiment is completed.

〔Effect of the invention〕

As explained above, according to the present invention, the old program and the new program that are placed twice in the program file run in parallel, and the online system sequentially switches from the old program to the new program. This eliminates the need to stop the online system when changing programs and eliminates running processes, thereby improving the quality of online services in the online system.

In addition, it is determined whether a program that can run as a startup program exists in the new program or the old program, and even if the startup program exists in the old program, the new program in the new and old entry address comparison table can be used. By making it possible to minimize the generation of processes that run using programs in old programs based on flags, etc., it is possible to eliminate processes that use programs in old programs at an early stage, and to improve program performance. This has the effect of shortening the time required for changes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flow chart showing the processing of the runnable program determination function in FIG. In the figure, 11... Process control block, 12... Runnable program determination function, 13... Old program management table, 14... Old and new entry address comparison table, 15... Program file, 16... - Old program, 17... New program.

Claims (1)

[Claims] A program file in which an old program that has already been incorporated into an online system and is currently in operation is subject to change, and a new program that is to be newly incorporated into the online system in place of the old program are simultaneously and doubly arranged. , an old program management table having information for identifying whether or not the issued program and the startup program are included in the program change target in the program file; and a startup process that uses the startup program included in the program change target is the program. A new program usable flag indicating whether the startup program in the new program can be used instead of the startup program in the old program in the file, the entry address of each program in the old program, and the correspondence in the new program a new/old entry address comparison table having comparison information with the entry address of each program, and a new/old entry display flag indicating whether each process is a process using a program in the old program in the program file. and a process control block that has a process control block, and when a startup process is generated by an issuing process after the old program and new program are placed twice in the program file, the issuing program is included in the program change target. It is determined whether the issuing process is using the issuing program in the old program based on the old program management table and the old/new display flag in the process control block of the issuing process, and based on this determination, the issuing program changes the program. When the issuing process is included in the target and the issuing process is using the issuing program in the old program, the new and old entry addresses are compared to see whether the startup process can be run using the startup program in the new program. Judgment is made based on the new program usable flag in the table, and if it is determined that the startup process cannot be run using the startup program in the new program, the startup program in the old program is used for the startup process. information indicating that the program in the old program is being used is set in the new/old display flag in the process control block of the startup destination process. Otherwise, the new entry address is set by referring to the new/old entry address comparison table. The startup program in the new program based on the conversion to the entry address and the startup program in the area in the program file other than the old program and the new program are used for the startup destination process. A program change method comprising: a runnable program determination function that sets information indicating that a program in an old program is not used in a new/old display flag in a process control block;