JPH06337809A - File multiple write processor - Google Patents

Abstract

PURPOSE:To reduce the processing time of a duplex write processing by providing a data update notice part giving a notice to the other computer when updated data reaches a prescribed data quantity unit. CONSTITUTION:The data update notice part 7 of the computer 1 in an operated state gives the notice to a computer 2 in a standby state through a transmission device 10 when data updated to a file 4 reaches the prescribed data quantity unit. The data update reception part 8 of the computer 2 receives the notice and updates data in the data quantity unit to a file 6. The data update notice part 7 sets the update flag of an update table 9 corresponding to the block of the file 4 where updated data exists. When the file is closed, data of the block of he file 4 corresponding to the update flag of the table 9 is transmitted to the data update reception part 8 and the table 9 is cleared. Thus, the number of times for transmitting the update notice is reduced because update data is not transmitted to the computer 2 in the standby state whenever the file 4 is updated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file multiple write processing device for performing multiple file write processing in a computer system including a computer having a multiplex structure having files to which the same data is written.

[0002]

2. Description of the Related Art There are two computer systems in the control field.
It is composed of a computer having exactly the same function of the stand. Then, one computer is always in an operating state in which control is actually performed, and one computer is in a standby state for backing up a computer in an operating state and taking over processing when a failure occurs in the computer in an operating state. . The data regarding the system of the operating state between these computers is stored in the common storage device of the two computers in the form of a plurality of files, and the common storage device is connected to the two computers by hardware. ing.

When the computer in the operating state detects a change in the controlled system, the changed state is written as data in a file in the common storage device. The computer in the standby state can take over the processing by taking over the data written in the common storage device by the computer in the operating state.

FIG. 6 is a block diagram showing the configuration of a conventional computer system as described above. In FIG. 6, 1 is a computer in an operating state, 2 is a computer in a standby state, 11, 12
Is a common storage device, and 13 and 14 are common storage devices 11 and 12.
A file provided above, 15 is a coupling device that couples the computers 1 and 2 and the common storage devices 11 and 12, respectively, and 16 is a data update processing unit that updates the data in the files on the common storage devices 13 and 14. . In this way,
Are the coupling device 15 and the data update processing unit 16 respectively.
Is equipped with. Further, the files 13 and 14 have a dual structure so that the system operation can be continued even when one of the common storage devices 11 and 12 fails.

Next, the operation at the time of updating the data of the files 13 and 14 in this computer system will be described. When a change in the controlled system is detected, the computer 1 in the operating state stores the changed state as data via the coupling device 15 in the files 13 on the common storage device 11, 12.
Write to 14. Here, if a failure occurs in the computer 1 in the operating state, the computer 2 in the standby state takes over the processing and enters the operating state.

[0006]

Since the conventional computer system has been processed as described above, a computer system having a dual system configuration can be constructed unless the computer can be connected to the common storage device. There wasn't. In addition, since the common storage device is hardware-coupled and the time required for data transfer processing is short, a general-purpose transmission device can be used in a computer that does not have a common storage device.
In order to construct a computer system having a dual system configuration, double writing processing with less transmission delay and less transmission overhead is required.

The present invention has been made in order to solve the above problems, and uses a general-purpose transmission device to construct a computer system having a dual system configuration in which files are duplicated. An object of the present invention is to provide a file multiple write processing device capable of reducing the processing time of double write processing.

[0008]

According to a first aspect of the present invention, a data update notifying section 7 is provided for notifying another computer when the data updated in a file of any computer reaches a predetermined data amount unit. The data update notification unit 7 is provided with a data update reception unit 8 which receives the notification from the data update notification unit 7 and updates the data of the data amount unit to a file of another computer.

The second aspect of the present invention is a data update notifying section 7 for notifying all the other computers when the data updated in the file of any of the computers reaches a predetermined data amount unit, and this data update notifying section 7 The data update receiving unit 8 receives the notification from the above and updates the data of the above data amount unit to the files of all other computers.

A third aspect of the invention is to provide a data update notifying section 7 for notifying another computer when the data updated in a file of one computer reaches a predetermined data amount unit, and a data update notifying section 7 from this data update notifying section 7. The data update receiving unit 8 which receives the notification and updates the data of the above-mentioned data amount unit to the file of the other computer, and the duplication by duplicating the file data from the other computer at the time of initial setting by one of the computers. It is provided with a file copy processing unit 22 which enables writing processing.

[0011]

In the first aspect of the invention, the data update notifying unit 7 notifies another computer 2 when the data updated in the file 4 of the computer 1 reaches a predetermined data amount unit, and the data update receiving unit 8 Upon receiving the notification, the data in the data amount unit is updated to the file 6 of the computer 2.

In the second aspect of the present invention, the data update notifying section 7 makes all of the other computers 2, 2a ... When the updated data in the file 4 of the computer 1 reaches a predetermined data amount unit, for example.
2n, and the data update receiving unit 8 receives the notification and sends the data in the data amount unit to all other computers 2, 2a ...
Update to 2n file.

In the third invention, the data update notifying section 7 notifies another computer 2 when the data updated in the file 4 of the computer 1 reaches a predetermined data amount unit,
The data update receiving unit 8 receives the notification and updates the data in the data amount unit to the file 6 of the other computer 2.
The file copy processing unit 22 enables the double writing process by copying the file data from the other computer 2 when the computer 1 is initialized.

[0014]

【Example】

Example 1 (corresponding to claim 1). Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a block diagram showing the configuration of a computer system according to an embodiment of the present invention. In FIG. 1, 3 is a storage device in the computer 1 in an operating state, 4 is a file provided in the storage device 3 in the computer 1 in an operating state, 5 is a storage device in the computer 2 in a standby state, 6 is a standby state The file provided in the storage device in the computer 2 of 7, the data update notification unit 7 for notifying the file update, 8 the data update receiving unit for receiving the file update notification, and 9 the file update status An update management table to be stored, 10 is two computers 1,
2 is a transmission device for performing update notification between
Is the same as. The data update notification unit 7 notifies the computer 2 when the data updated in the file 4 of the computer 1 reaches a predetermined data amount unit. Data update receiving unit 8
Receives the notification and updates the data in the data amount unit in the file 6 of the computer 2. Note that the computer 1 is shown to include the data update notification unit 7 and the update management table 9, and the computer 2 is shown to include the data update receiving unit 8. However, the computer 1 and the computer 2 each include the data update notification unit 7 And an update management table 9 and a data update receiving unit 8.

FIG. 2 shows the update management table 9 and the file 4
It is a figure explaining the relationship of. The update management table 9 is assigned to the file 4 on a one-to-one basis. Each file 4 is managed by being divided into blocks 11 each having a certain size, and the update flag 1 of the update table 9 is assigned to each block.
2 corresponds.

Next, the operation will be described. Here, a case where the computer 1 updates certain data in the file of the file 4 will be described. In the computer 1, when the file to be written is opened, the data update notification unit 7
Requests the data update receiving unit 8 to open the same file 6 in the computer 2 in the standby state via the transmission device 10. When the file is opened, the data update notification unit 7 of the computer in the operating state makes a file open request to the data update receiving unit 8 of the computer in the standby state. When the data of the file in another computer is updated, the data update notifying unit 7 updates the data of the file in its own computer and then sets the update flag 12 of the block 11 corresponding to the updated data.

Next, the processing when the file is closed will be described with reference to the flowchart of FIG. First, it is determined whether or not the update flag in the file is set (step S31). If the update flag is set, the data of the block corresponding to the update flag is transmitted to the data update receiving unit 8. (Step S32). If the update flag is not set here, data transmission is not performed. If the update flag that needs to be judged remains,
The next update flag is checked (step S3)
3, S34). If there is no update flag that needs to be determined, after requesting the data update receiving unit 8 to close the file (step S35), the file in the local computer is closed and the file update management table 9 is opened. It is reset (cleared) (step S36).

By doing this, when the file is updated, the update data is not sent to the computer 2 in the standby state every time the file is updated, so the number of times of sending the update notification is reduced. The time required to update the data can be reduced. Further, by setting the size of the block 11 to a value with high transfer efficiency of the storage devices 3 and 5 and the transmission device 10, the time required for one update process can be reduced.

Embodiment 2 (corresponding to claim 2). By the way, in the above-described first embodiment, the data of the file 4 is equivalent to the data of the file 6 in the computer system having the double system. However, the present invention is not limited to this, and in a computer system including three or more computers, two computers in the operating state and the standby state may perform the double writing process.

FIG. 4 is a block diagram showing the configuration of a computer system according to the second embodiment of the present invention. 4, the components corresponding to those shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 4, reference numeral 21 is an update target computer management table that stores which computers require data equivalence, and 2a to 2n are other computer groups constituting the system. In addition, calculator 1,
2, 2a to 2n each include a data update notification unit 7, a data update receiving unit 8, an update management table 9, and an update target computer management table 21.

When the file is opened, the data update notification unit 7 of the operating computer reads the update target computer management table 21 when the file is opened, and the data update reception unit 8 of all the computers currently being updated receives the file. Request open.

Next, the processing for closing the file 4 will be described. When the file is closed, the processes of steps S32 and S35 in the flowchart of FIG. 3 are performed for the number of update target computers registered in the update target computer management table 21. By doing so, all computers to be updated can be updated, and file equivalent processing can be realized in a computer system composed of three or more computers.

Embodiment 3 (corresponding to claim 3). In the first and second embodiments, the file equalization processing is performed when the computer is in the operating state and the standby state. In reality, however, the preparation state after the operation of the computer is changed to the standby state in which double writing is possible. In order to do so, it is necessary to copy the contents of the file from the operating computer.

FIG. 5 is a block diagram showing the configuration of a computer system according to the third embodiment of the present invention. 5, components corresponding to those shown in FIG. 1 are designated by the same reference numerals, and their description will be omitted. In the figure, 22 is
This is a file copy processing unit for receiving file data from a computer in operation and copying it to a file in its own computer when the computer shifts to a standby state after starting operation. Reference numeral 23 is a file data transmission processing unit that transfers the requested file in the computer in the operating state. The data update notifying unit 7 notifies another computer when the data updated in the file of one computer reaches a predetermined data amount unit. Data update receiving unit 8
Is to receive the notification from the data update notifying unit 7 and update the data in the data amount unit to the file of another computer. The file copy processing unit 22 enables the dual writing process by copying the file data from another computer at the time of initial setting by one of the computers. The computers 1 and 2 each include a data update notification unit 7, a data update reception unit 8, an update management table 9, a file copy processing unit 22, and a file data transmission processing unit 23.

Next, the operation of the file data transmission process when copying a file will be described. When receiving the file copy request from the file copy processing unit 22, the file data transmission processing unit 23 suppresses the update of the file in the own computer so that other processes cannot update the file. The file data transmission processing unit 23
Next, the file data is transmitted to the file copy processing unit 22, and the suppression of updating the file is released.

By doing so, the contents of the data in the file can be taken over when the computer shifts from the ready state to the standby state (during initial setting).
The data contents of the files of the two computers can be made equal. Further, by not updating the computer in the operating state at the time of copying the file, the update at the time of copying the file can be surely reflected in the computer in the standby state.

[0027]

As described above, according to the first aspect of the present invention, when the data updated in the file of any computer reaches a predetermined data amount unit, a data update notifying unit for notifying another computer, Since the data update receiving unit that receives the notification from the data update notifying unit and updates the data in the data amount unit to the file of another computer is configured, the file is duplicated by using a general-purpose transmission device. It is possible to construct a computer system having a duplicated system configuration and reduce the processing time of the dual writing process.

According to the second invention, when the data updated in the file of any of the computers reaches a predetermined data amount unit, the data update notifying section for notifying all the other computers and the data update notifying section Is configured to include a data update receiving unit that receives the notification of the above and updates the data of the above-mentioned data amount unit to the files of all other computers. Therefore, even in a computer system having three or more computer configurations, the same effect as above is provided. Is obtained.

According to the third invention, when the data updated in the file of one computer reaches a predetermined data amount unit, the data update notifying section for notifying another computer and the data update notifying section from this data update notifying section Double writing by receiving a notification and updating the data of the above data amount unit to the file of another computer and by copying the file data from another computer at the time of initial setting by one of the computers Since a file copy processing unit for enabling processing is provided, the same effect as described above can be obtained, and
There is also an effect that the file data can be surely reflected when the operating state of the computer is changed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a computer system using a file multiple write processing device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a relationship between a file and an update management table in the file multiple write processing apparatus according to the first embodiment of the present invention.

FIG. 3 is a flow chart for explaining the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a computer system using a file multiple write processing device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a computer system using a file multiple write processing device according to a third embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional dual computer system.

[Explanation of symbols]

1 computer in operating state 2 computer in standby state 3 internal storage device in computer in operating state 4 file provided in internal storage device in computer in operating state 5 internal storage device in computer in standby state 6 operating state File provided in the in-computer storage device of the computer 7 Data update notification unit 8 Data update receiving unit 9 Update management table 10 Transmission device 11 Common storage device 12 Common storage device 13 File provided in the common storage device 14 In the common storage device Provided file 15 Coupling device 16 Data update processing unit 21 Update target computer management table 22 File copy processing unit 23 File data transmission processing unit

Claims (3)

[Claims] 1. In a computer system comprising a computer having a multiplexing configuration having files to which the same data is written and a data transmission device for performing data transmission between the computers, the file is updated to one of the computers. When the data reaches a predetermined data amount unit, a data update notifying unit for notifying another computer and a notification from this data update notifying unit are received and the data in the data amount unit is stored in the file of the other computer. A file multiple write processing device having a data update receiving unit for updating. 2. A computer system comprising three or more computers having a multiplex structure having files to which the same data is written and a data transmission device for transmitting data between the computers. When the data updated in the file reaches a predetermined data amount unit, the data update notification unit for notifying all other computers, and the notification from this data update notification unit is received and the data in the data amount unit is A multiple file writing processing apparatus having a data update receiving unit for updating files of all the computers. 3. In a computer system comprising a computer having a multiplex structure having files to which the same data is written and a data transmission device for transmitting data between the computers, data updated to a file of one computer When it reaches a predetermined data amount unit, it notifies the other computer of the data update notification unit, and receives the notification from this data update notification unit and updates the data of the above data amount unit to the file of the other computer. A file including a data update receiving unit for enabling the dual writing process by copying the file data from one of the other computers at the time of initial setting. Multiple writing processor.