JPH03137742A - Data file equivalent processing method - Google Patents

Abstract

PURPOSE:To reduce a load and to shorten a rise by transferring only a record altered in the computer system of the other system for respective records concerned of a data file and preventing transfer when data is not altered. CONSTITUTION:When the presence or absence of the alteration of data on a subordinate system 20-side is judged and when there is no alteration in data, a system returns to the beginning. When there is alteration in data, the system shifts next. Then, the presence or absence of the alteration of data is stored in a memory map 221 in terms of the records in data files 23 and 24 in the subordinate system 20 and the system shifts to the next. Then, altered data are written into the files 23 and 24 in the subordinate system 20. Then, the map 221 of the subordinate system 20 is referred and altered data of the record concerned is transferred to the data files 13 and 14 of a main system 10. Then, altered data are written into records 131 and 132 in the files 13 and 14 in the main system 10 in correspondence with the records 231 and 241 of the files 23 and 24 in the subordinate system 20. When the subordinate system 20-side stops and data is transferred from the main system 10-side to the subordinate system 20-side, a memory map 121 on the main system 10-side is referred and transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data file equivalent processing method for an information processing apparatus using a computer system.

In particular, the present invention relates to a data file equivalent processing method for an information processing apparatus having a dual computer system.

[Summary of the invention]

The present invention is a data file equivalent processing method for an information processing device with a dual computer system, and when starting up the system after stopping one computer system for maintenance etc., The presence or absence of data changes is recorded in the memory map of the memory, and the memory map is used to refer to only the records that have been changed between the shutdown and startup of one system's computer system among the records of the data file of the other system's computer system. Then, the records are transferred to the corresponding record in the data file of one system and the data file of the other system is rewritten, thereby speeding up the startup of the stopped system and reducing the load on the system.

[Conventional technology]

Conventionally, information processing devices using computer systems, etc. have been constructed in a dual system, with a main computer system and a slave computer system, in order to increase reliability in boat fishing. Operate the system and perform dual operation.

In such an information processing apparatus, when performing maintenance on a computer system, one system is kept in operation while the other system is stopped.

Then, after maintenance etc. are completed, the stopped prefecture will be started up. In some cases, the contents of the data files between the two systems are different, and when the system is started up after maintenance or the like, it is necessary to perform equivalent processing on the data files between one system and the other system.

3 to 5 are explanatory diagrams for explaining such a conventional data file equivalent processing method, and the third IM is a diagram showing an example of an information processing apparatus having a dual system computer system.

That is, the information processing apparatus includes a main computer system 10 and a main computer system 20.

The main computer system 10 includes a central processing unit i!
ll (hereinafter referred to as a CPU), a memory 12, and data files 13 and 14.

It is connected to a predetermined input/output device 15 via a transmission line 30.

The slave computer system 20 has a CPU 21, a memory 22, and data files 23, 24, and is connected to a predetermined input/output device 25 via a transmission line 30.

Figure 1g4 shows the conventional data file data transfer process.
FIG.

In other words, the slave side is operated, the main computer system IO is stopped for maintenance etc., and the measurement values are read into the slave side during this stop or during startup.
Suppose that data changes such as data settings occur.

In this case, first, change data is transferred to the corresponding records 231, 2 of the subordinate data files 23, 24, respectively.
When the main computer system 10 is started up, the data files 23 and 24 of the slave computer system 20 are transferred to the data files 13 and 14 of the main system 1, respectively. Perform batch feed for each file.

Figure 5 shows the flowchart.

In step Sll, if there is changed data in the subordinate data files 23 and 24, the changed data is written to the corresponding record.

Next, in step S12, data is transferred in batch from the slave data files 23.24 to the master data files 13.14, respectively, in file units, and in step S13, data is transferred from the slave data files 23.24 to the master data files 23.14, respectively. Main system data file corresponding to 24.13. Write data to lli.

[Problem to be solved by the invention]

As mentioned above, when data file transfer processing is performed for each data file between the slave system and the main system or between the main system and the slave system, file equivalency processing takes time in proportion to the scale of the system. In such a system, the start-up time becomes long and the load on the system becomes large.

The ratio of the time required for starting up the system after maintenance for equivalent processing of this data file to the starting time is extremely large.

[Means and effects for solving am] The present invention is a data file equivalent processing method for an information processing apparatus having a dual computer system.

A memory map is provided in the memory of both computer systems, and when data changes occur in the computer system of the other system between the time when one system is stopped and the computer system is started, the record unit of the data file is stored in the memory map of the other side. When the computer system on one side starts up, it refers to the memory map on the other side and transfers the data in the changed data file to the corresponding record in the data file on the other side. This is done by rewriting the data files of both systems to -M.

In the present invention, if there is no changed data record, no transfer is performed.

In this way, by transferring only the data of the record in which the data change has occurred to the record of the other system, the load on the computer system is reduced and the start-up time is shortened.

〔Example〕

Hereinafter, the present invention will be explained in detail based on an embodiment shown in FIG. 1U2 and FIG.

In addition, since the configuration of the information processing apparatus of the present invention is almost the same as that shown in FIGS. 3 and 4 described above, FIGS.
Parts that have the same function as those in the diagram are marked with the symbol
Detailed explanation will be omitted.

FIG. 1 is a diagram for explaining data transfer processing according to an embodiment of the present invention.

An information processing device with a dual computer system configuration is composed of a main computer system 1O and a slave computer system 20, as in the conventional system, but maintenance of the main system is not necessary. If data is changed during the process, the presence or absence of the data change is stored in the memory map 221 provided in the common area of the slave memory 22 in record units of the data files 23-24.

Next, when starting up the stopped main computer system, the changed data is transferred to the main computer system according to the flow shown in FIG.

FIG. 2 is a flow diagram showing one embodiment of this data transfer processing.

In step S1, check whether data has been changed on the slave side.
When there is no data change, the process returns to the beginning, and when there is a data change, the process moves to step S2.

In step S2, the presence or absence of data changes is checked in the memory map 221 for each record of the slave data files 23 and 24.
is stored, and the process moves to step S3.

In step S3, the changed data is written to the slave data files 23 and 24.

In step S4, the memory map 221 on the memory 22 of the slave system is referred to and the changed data of the corresponding record is transferred to the data file 13.14 of the master system.

In step S5, records 131 and 132 of the primary data file 13.14 are entered in the secondary data file 23.
．． Change data is written in correspondence with records 231 and 241 of No. 24.

Note that when the slave side is stopped and data is transferred from the master side to the slave side, the memory map 121 on the master side is referred to and data is transferred.

〔Effect of the invention〕

As explained above, in the present invention, the transfer that was conventionally performed for each data file is changed so that only records that have been changed in the computer system of the other system in operation are transferred for each corresponding record of the data file. In addition, since data is not transferred when there is no data change, it is possible to reduce the load on the computer system and shorten the start-up time associated with data file equalization processing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a flow diagram showing the data transfer process of FIG. 1, FIG. 3 is a diagram showing a dual system information processing device, and FIG. FIG. ffI5, which is a diagram showing a conventional data file equivalent processing method, is a flow diagram showing the data transfer process of FIG. 4. 10... Main computer system. 20...Slave computer system, 11.21
····data file. 14.24...Memory. 141.241...Memory map.

Claims (1)

[Claims] In a data file equivalent processing method for an information processing device with dual computer systems, a memory map is provided in the memory of both computer systems, and the computer system of the other system is updated from the stop of one system until the start of the other system. When data changes occur in the system, the presence or absence of data changes is stored in the memory map on the other side for each record of the data file, and the memory map on the other side is referenced when starting up the computer system on the other side. A data file equivalence processing method characterized in that the data of the changed data file is transferred to the corresponding record of the data file on one side, the data file is rewritten, and the data files of both systems are made to match.