JPH0981409A - Mutual hot standby system selecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically select a standby system processing function which can be made to correspond without intervention of an operator, to make the function correspond and to construct a hot standby relation when the standby system processing function which is made to correspond to a working system processing function becomes inexistent due to the fault of an electronic computer. SOLUTION: Processing function control means 61 and 63 select standby system processing functions 13, 23 and 33 having no working system processing functions 11, 21 and 31 to which other electronic computers 1 to 3 are made to correspond by referring to processing function control tables 61 to 63, makes the functions correspond to the working system processing functions 11, 21 and 31 to be request origins and automatically constructs a hot standby relation, in compliance with the requests from the working system processing functions 11, 21 and 31 which lost the standby system processing functions 12, 22 and 23 which are made to correspond when the fault of the electronic computers 1 to 3 is developed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mutual hot standby system composed of a plurality of computers, and more particularly, an operating system for performing online data processing in the mutual hot standby system composed of three or more computers. Mutual hot standby system standby system selection method that associates the processing function with the standby system processing function that takes over the online data processing and becomes the active system processing function to continue processing when an error occurs in the online data processing Regarding

[0002]

2. Description of the Related Art When online data processing using an electronic computer cannot be continued due to a failure of the electronic computer, the online data processing is immediately taken over,
As a highly reliable system that can continue online data processing, there is a system called a mutual hot standby system composed of multiple computers.

For example, as shown in FIG. 9, in a mutual hot standby system composed of three computers 1, 2, 3, the computers 1, 2, 3 have paths 512, 52.
3, 531 are connected to each other.

Each of the computers 1, 2, 3 has an operating system processing function 11, 21, 31 for performing online data processing.
And standby system processing functions 12, 22, 32 for taking over online data processing when a failure occurs, and paths 512, 523, 531 for connecting the computers 1, 2, 3
The operating system processing function 11 and the standby system processing function 22, the operating system processing function 21 and the standby system processing function 32, and the operating system processing function 31 and the standby system processing function 12 respectively monitor the operating status via We are building a hot standby relationship.

The operating system processing functions 11, 21 and 31 are distributed to the electronic computers 1, 2 and 3 because the load of online data processing is distributed to the electronic computers 1, 2 and 3. This is a method performed so as not to reduce the processing speed. In addition, the standby processing functions 12, 22, 3
2 is distributed to the computers 1, 2 and 3 when a standby computer processing function takes over the online data processing due to a hot standby relationship due to a failure of a computer.
This is done to prevent online data processing from concentrating on one computer, and to prevent the computer running the standby system processing function from running out due to a computer failure on the contrary. Is the way.

In such a conventional mutual hot standby system, each computer 1 is operated as intended by the operator.
In order to distribute the load of a few, the operating system processing function 1
1, 21, 31 and the standby system processing functions 12, 22, 32 are associated with each other to establish a hot standby relationship, that is, the active system processing functions 11, 21, 31 and the standby system processing function 12,
It was specified by the operator when starting 22 and 32.

In FIG. 10, a failure occurs in the electronic computer 1,
The state after the electronic computer 1 stops the processing and the online data processing is taken over based on the hot standby relationship is shown. Here, the standby system processing function 22 of the electronic computer 2
Is a state in which the processing of the operating system processing function 11 is taken over to become the operating system processing function 22 ′, and the corresponding standby system processing function does not exist, and the operating system processing function 3 of the electronic computer 3 is
1 is a state in which the corresponding standby system processing function does not exist. In this state, even though the two computers 2 and 3 are operating normally, the three operating system processing functions 2
There is no standby system processing function associated with two of 1, 2, 2 ', and 31, and the reliability is significantly reduced.

In this state, the operator activates the standby system processing function associated with the active system processing function 22 'in the electronic computer 3 and the standby system processing function associated with the active system processing function 31 in the electronic computer 2. Or the standby computer processing function corresponding to the operating system processing function 22 'of the electronic computer 2 and the operating system processing function 31 of the electronic computer 3 is started up.

[0009]

In the above-mentioned conventional mutual hot standby system composed of three or more computers, when one computer is stopped, two
Even if more than one computer is operating normally, the standby system processing function associated with the active system processing function does not exist, so if another computer stops, There has been a problem that a part of the online data processing is stopped, resulting in a significantly reduced reliability, which requires an operation by an operator to restore the reliability.

In view of the above points, an object of the present invention is to newly cope without the operation of an operator when the standby system processing function associated with the active system processing function does not exist due to the failure of the electronic computer. To provide a mutual hot standby system standby system selection method that enables restoration of reliability by selecting and correlating standby system processing functions that can be attached and automatically establishing a hot standby relationship. It is in.

Another object of the present invention is that the operating system processing functions operate on the electronic computer designated by the operator regardless of the order of activation of the operating system processing functions and the standby system processing functions in each electronic computer. It is to provide a mutual hot standby system standby system selection method that is preferentially associated with a standby system processing function.

As prior art, Japanese Patent Laid-Open No. 3-116
There is a "mutual standby job processing device" disclosed in Japanese Patent No. 337, which is a system in which a plurality of computers are set to a standby state and a plurality of jobs are executed by one computer. By executing the switching by referring to the job management table that manages the standby state, job distribution can be prevented at the time of computer switching, and the purpose and effect are different from the present invention.

[0013]

The mutual hot standby system standby system selection method of the present invention is composed of three or more computers, and each computer is arranged so as to distribute the load of the operating system processing function performing online data processing. In addition to operating on a computer, the online data processing is taken over when an abnormality occurs in the online data processing. In the mutual hot standby system configured to operate in the same manner, the identifiers of the active system processing functions that operate in the local computer, the identifiers of the standby system processing functions that are associated so as to establish a hot standby relationship with the active system processing functions, and the Information that consists of the number of the computer on which the standby processing function operates and that it operates on its own computer Registers an identifier of a machine processing function, an identifier of an active system processing function associated with the standby system processing function so as to establish a hot standby relationship, and information including the number of the computer on which the active system processing function operates. The processing function management table is associated with another computer by referring to the processing function management table in response to a request from an active system processing function that has no associated standby system processing function when a failure occurs in the electronic computer. And a processing function management means for automatically establishing a hot standby relationship by selecting a standby system processing function without an active system processing function and associating it with the operating system processing function of the request source.

The mutual hot standby system standby system selection method of the present invention is composed of three or more computers, and each computer is operated so as to distribute the load of the operating system processing function that is performing online data processing. At the same time, when an abnormality occurs in online data processing, the standby data processing function that takes over the online data processing and becomes the active system processing function and continues processing is operated on a computer different from the active system processing function. In the mutual hot standby system, an identifier of an active system processing function that operates on its own computer, an identifier of a standby system processing function associated so as to establish a hot standby relationship with the active system processing function, and the standby system processing function operates Computer number and the computer number that should prioritize the correspondence between standby processing functions Information, an identifier of a standby system processing function that operates on the own computer, an identifier of an active system processing function associated with the standby system processing function so as to establish a hot standby relationship, and an electronic device on which the active system processing function operates. Processing function management table that registers information consisting of computer numbers, and standby system processing that correlates to active system processing functions by referring to the computer identifier that should give priority to the correspondence of standby system processing functions in this processing function management table The computer includes a priority control means for controlling the priority order of selection of the computer in which the function is operating, and a correspondence change notifying means for notifying the change of the correspondence to the active system processing function and the standby system processing function. When the operating statuses of the active system processing function and the standby system processing function change, the electronic meter indicated by the priority computer number is referred to the active system processing function by referring to the processing function management table. If a standby system processing function that operates on a computer other than a computer is associated, the standby system processing function of the computer that cancels the association between the active system processing function and the standby system processing function and prioritizes the association And a processing function management means for automatically changing the hot standby relationship by selecting the item corresponding to the operating system processing function of the request source.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

[0016]

1 is a block diagram showing the configuration of a mutual hot standby system to which a mutual hot standby system standby system selection method according to a first embodiment of the present invention is applied. This mutual hot standby system is composed of three electronic computers 1, 2, and 3.
The spaces are connected via paths 512, 523, and 531. Each of the computers 1, 2, 3 has an active system processing function 11, 21, 31 for performing online data processing and a standby system processing function 12, 13, 22, 23, for taking over online data processing when a failure occurs. 32, 33, operating system processing functions 11, 21, 31 and standby system processing functions 12, 1
3, 22, 23, 32, 33, respectively, and processing function management means 51, 52, 53 for controlling the correspondence with the processing function management means 51, 52, 53, respectively.
62 and 63 are provided respectively.

FIG. 2 shows a state transition diagram when the computer 1 is stopped due to a failure while operating in the state of FIG.

Referring to FIG. 3, the processing function management table 61,
Reference numerals 62 and 63 denote active system processing function identifiers that register the identifiers of the active system processing functions that are operating in the electronic computer, the presence or absence of association that registers the presence or absence of association, and the associated standby system processing functions. The corresponding computer number that registers the computer number to be registered and the corresponding standby system processing function identifier that registers the identifier of the associated standby system processing function. The standby computer processing function identifier for registering the standby system processing function identifier, the presence / absence of association for registering the presence / absence of the association, and the corresponding electronic computer for registering the number of the electronic computer on which the associated active system processing function operates A plurality of entries including fields of a number and a corresponding operating system processing function identifier for registering the identifier of the associated operating system processing function.

Referring to FIG. 4, the processing function management means 5
1, 52, and 53 when the state transitions from the state of FIG. 1 to the state of FIG.
101 and other computer standby system processing function search step S
102, association determination step S103, search standby processing function association request step S104, association permission determination step S105, association completion notification step S106, and other computer all standby system processing function search termination determination step S107, an all-others computer search processing end determination step S108, an unsearched computer standby system processing function information acquisition step S109, and a correspondence standby system no function notification step S110.

The operation of the mutual hot standby system standby system selection system of the first embodiment thus constructed will be described below.

The operating system processing functions 11, 21, 31 activated by the respective electronic computers 1, 2, 3 are their own electronic computers 1, 2, 3.
It requests the processing function management means 51, 52, 53 existing in No. 3 to select the associated standby processing function.

The processing function management means 51, 52, 53 are paths 512, 523 connecting the computers 1, 2, 3 respectively.
Processing function management tables 61, 6 from the processing function management means 51, 52, 53 of other electronic computers 1, 2, 3 via 531.
The information of the active system processing function identifiers, the presence / absence of association, the corresponding computer numbers and the corresponding standby system processing function identifiers recorded in Nos. 2, 63 are acquired, and the acquired standby system processing functions 12, 1 are acquired.
Based on the information of 3, 22, 23, 32, 33, the standby system processing function to be associated is selected, and the result is notified to the requesting operating system processing functions 11, 21, 31.

For example, in the computer 1, the operating system processing function 1
When the operation 1 is started, the operating system processing function 11 causes the processing function management means 51 of the electronic computer 1 to operate the operating system processing function 1.
The activation notification of No. 1 and the request for selection of the associated standby system processing function are performed.

Upon receipt of the request, the processing function management means 51 secures one entry in the processing function management table 61, records the identifier of the active system processing function 11, and processes the other computer 2 via the connection path 512. From the function management means 52 (processing function management table 62), the information of the identifiers of the standby system processing functions 22 and 23 operating in the other electronic computer 2, the presence / absence of correspondence, the corresponding computer number and the corresponding operating system processing function identifier are acquired ( In step S101), it is checked whether or not there is a standby system processing function that is not associated (step S102). Now
Since there is a standby processing function 22 that is not associated (Yes in step S103), the processing function management unit 51
The standby system processing function 22 associates the standby system processing function 22 with the operating system processing function 11 of the computer 1.
Is requested to the processing function management means 52 of the computer 2 (step S104).

The processing function management means 52 that has received the request has a processing function management table 62 unless there is a factor that prevents the association, such as whether there is a conflict with a request from another computer.
Corresponding to the identifier of the standby system processing function 22 of the above, there is a correspondence, and the number of the computer 1 on which the associated operating system processing function 11 operates and the associated operating system processing function 1
Recorded the identifier of 1 and associated operating system processing function 1
The information of No. 1 is notified to the standby system processing function 22, and the association permission is returned to the processing function management means 51 of the computer 1 which made the request. On the other hand, if there is a factor that hinders the association, the processing function management means 52 sends a response indicating that the association is impossible to the processing function management means 51 of the computer 1.

The processing function management means 51 of the electronic computer 1 is
When the association permission is received (step S105)
Yes), the processing function management table 61 of the operating system processing function 11
Is recorded in association with the identifier of the standby computer processing function 22 and the number of the electronic computer 2 in which the associated standby system processing function 22 operates.
Information about the standby system processing function 22 is used to request the operating system processing function 1
1 is notified (step S106). When it is determined that the association is not possible (NO in step S105), the processing function management unit 51 determines whether or not all the standby system processing functions of the electronic computer 2 have been searched (step S10).
7) If there is an unsearched standby processing function, step S1
The control is returned to 02 and the processes of steps S102 to S107 are repeated. When all the standby system processing functions of the electronic computer 2 that have acquired the information for performing the association are not associated (Yes in step S107), the search processing is further performed for all the other electronic computers 3. It is determined whether or not it has been performed (step S108), and if there is an electronic computer 3 that has not been searched, the information of the standby processing function is acquired (step S109), the control is returned to step S102, and the processing of steps S102 to S109 is repeated. . When the search processing is completed for all other electronic computers in step S108, the active system processing function 11 of the request source is notified that there is no associated standby system processing function (step S110).

Operating system processing functions 11, 21, 31 and standby system processing functions 12, 22, 3 of the respective computers 1, 2, 3.
2 performs processing for establishing a hot standby relationship based on the notified information of the other party. For example, processing such as communication of used resource information from the operating system processing function 11 to the standby system processing function 22 is performed.

As a result of the above processing, the operating system processing function 11 is the standby system processing function 22, the operating system processing function 21 is the standby system processing function 32, and the operating system processing function 31 is the standby system processing function 12.
Be associated with.

In the state of FIG. 1, the standby system processing functions 13, 23, 33 are operating in a state where there is no associated active system processing function. These are for newly associating with the active system processing functions that have lost the standby system processing functions associated with the computer being stopped due to a failure or the like, and should be operated in advance. Will be needed.

When the computer 1 is stopped due to a failure as shown in FIG. 2 while operating in the state of FIG. 1,
Standby system processing function 22 operating in the computer 2 associated with the active system processing function 11 existing in the computer 1
Becomes the operating system processing function 22 'newly taking over the online data processing, and there is no associated standby system processing function, and the processing function management means 52
The information of the standby system processing function 22 in the processing function management table 62 is rewritten to the information of the active system processing function 22 '. Similarly, the active system processing function 31 operating in the electronic computer 3 has no associated standby system processing function because the standby system processing function 12 existing in the electronic computer 1 has disappeared, and the processing function management means 53 uses the processing function management. The information of the standby system processing function 31 in Table 63 is rewritten.

The active system processing function 22 'which is not associated with the standby system processing function requests the selection of the standby system processing function associated with the processing function management means 52 of the own computer 2.

Upon receipt of the request, the processing function management means 52 receives the request from the processing function management means 53 (processing function management table 63) of the computer 3 via the connection path 523 and the standby system processing function 32 operating in the computer 3. , 33, the presence / absence of correspondence, the corresponding computer number and the corresponding operating system processing function identifier are acquired (step S101), and the presence / absence of a non-corresponding standby system processing function is checked (step S1).
02). Standby system processing function 3 not currently associated
3 (Yes in step S103), the processing function management means 52 causes the standby processing function 33 and the own computer 2 to perform processing.
The processing function management means 53 of the computer 3 in which the standby system processing function 33 operates is requested to be associated with the operating system processing function 22 '(step S104).

The processing function management means 53 which has received the request has a processing function management table 63 unless there is a factor that hinders the correspondence, such as whether there is a conflict with a request from another computer.
Corresponding to the identifier of the standby system processing function 33, the number of the computer 1 on which the associated operating system processing function 22 'operates and the corresponding operating system processing function 22'
Is recorded, and the association permission is returned to the processing function management means 52 of the computer 2 that made the request.

The processing function management means 52 of the electronic computer 2 is
When the association permission is received (step S105)
Yes), the operating function processing function 2 in the processing function management table 61
2'is associated with the identifier, and the number of the computer 3 on which the associated standby processing function 33 operates and the associated identifier of the standby processing function 33 are recorded, and the information of the standby processing function 33 is recorded. To the requesting operating system processing function 22 '(step S106). As a result, the active system processing function 22 ′ of the electronic computer 2 and the standby system processing function 33 of the electronic computer 3 are associated with each other.

Regarding the operating system processing function 31 of the electronic computer 3 and the standby system processing function 23 of the electronic computer 2, the processing function managing means 53, the path 523 and the processing function managing means 52 are also included.
Is associated with.

From the above, in the electronic computers 2 and 3,
Active system processing functions 22 ', 31 and standby system processing functions 33, 2
Correspondence with No. 3 is performed without operator's operation, and a hot standby relationship is established.

By the way, in the above-described first embodiment, the operation system processing function and the standby system processing function in the degenerate operation are associated with each other without the operation of the operator. If the processing that associates the active system processing function and the standby system processing function without the operator's operation is applied not only when the degenerate operation is performed but also when the active system processing function is operated, the operator can Even if the user forgets to operate the standby system processing function associated with the processing function, it can be associated with the standby system processing function operating at that time.

However, in the first embodiment, all the correspondences between the operating system processing functions and the standby system processing functions are associated with the operating system processing functions and the standby system processing in which the processing function management means is operating in each computer at that time. After selecting from the function, the correspondence will not be changed until a certain computer stops, so
Unless the starting sequence of the operating system processing function and the standby system processing function in each computer is considered, the operating system processing function and the standby system processing function intended by the operator cannot be associated. Load balancing is not realized.

FIG. 5 is a block diagram showing the configuration of a mutual hot standby system to which the mutual hot standby system standby system selection method according to the second embodiment of the present invention is applied. This mutual hot standby system is the same as the mutual hot standby system shown in FIG. 1 to which the mutual hot standby system standby system selection method of the first embodiment is applied in order to realize the load distribution of the computers 1, 2, 3. The processing function management means 51, 52, and 53 are controlled by the processing function management tables 61 ', 62', and 63 ', and the priority order of selection of the computers 1, 2, and 3 in which the corresponding standby system processing functions are operating. Priority control means 71, 72, 73 for performing
Corresponding change notifying means 81, 82, 83 for notifying the change of the correspondence to the active system processing function and the standby system processing function from the processing function management means 51, 52, 53 are provided. It should be noted that each means, each function, and the like corresponding to the mutual hot standby system shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In each of the computers 1, 2 and 3, operating system processing functions 11, 21 and 3 for performing online data processing
1 and the standby system processing functions 12, 32, 33 for taking over the online data processing when a failure occurs are activated.

FIG. 6 is a state transition diagram when the operator activates the standby system processing function 22 on the electronic computer 2 from the state of FIG.

Referring to FIG. 7, the processing function management table 6
1 ', 62', and 63 'are active system processing function identifiers that register the identifiers of the active system processing functions that are operating in the own computer, the presence or absence of association that registers the presence or absence of association, and the associated standby. Priority is given to the correspondence between the corresponding computer number that registers the number of the computer that has the system processing function, the corresponding standby system processing function identifier that registers the identifier of the associated standby system processing function, and the standby system processing function. Whether or not there is a correspondence between a plurality of entries consisting of fields of priority computer number for registering the number of the computer to be processed and standby system function identifier for registering the identifier of the standby system process function operating in its own computer Whether or not the corresponding computer is registered, and the corresponding computer number that registers the number of the computer on which the associated operating system processing function operates, and the identifier of the associated operating system processing function are registered. It is composed of a plurality of entries consisting of fields with the corresponding operating system processing function identifier that.

Referring to FIG. 8, processing function management means 5
5, 52 and 53, the processing for transitioning from the state of FIG. 5 to the state of FIG. 6 is performed in the operating system processing function priority computer number acquisition step S201, the corresponding standby system processing function priority computer existence determination step S202, Electronic computer standby system processing function information acquisition step S203, priority electronic computer standby system processing function search step S204, association determination step S205, search standby system processing function association request step S206, association permission determination step S207.
And a correspondence standby step S208, a corresponding standby system processing function information notification step S209, and a priority computer all standby system processing function search processing end determination step S210.

The operation of the mutual hot standby system standby system selection system of the second embodiment having such a configuration will be described below.

First, the operator activates the standby system processing function 12 on the electronic computer 1, and the electronic computer 3 activates the standby system processing function 3.
Suppose that 2, 33 are activated. When the operator activates the standby system processing function 12 on the electronic computer 1 and activates the standby system processing functions 32 and 33 on the electronic computer 3, the operating system processing function of the associated computer is designated. You don't have to.

Next, the operator designates the operating system processing function 11 on the electronic computer 1 so as to be associated with the standby system processing function of the electronic computer 2 and activates it, and the electronic computer 2 activates the operating system processing function 21. It is assumed that the computer 3 is activated by designating it to be associated with the standby system processing function, and the electronic computer 3 is activated by designating the active system processing function 31 to be associated with the standby system processing function of the electronic computer 1.

Then, the operating system processing function 3 of the electronic computer 3
1 requests the processing function management means 53 to select the priority of the association with the standby processing function existing in the computer 1.

The processing function management means 53 is the priority control means 7
3, the operating system processing function 31 of the processing function management table 63 '
Computer 1 to the priority computer number corresponding to the identifier of
The standby system processing function 12 is selected because the standby system processing function 12 of the computer 1 is the only standby system processing function that can be associated with the active system processing function 31 by referring to the processing function management table 63 ′. Processing function management table 63 '
The number of the electronic computer 1 is recorded in the corresponding computer number corresponding to the identifier of the operating system processing function 31 and the number of the standby system processing function 12 is recorded in the corresponding standby system processing function identifier. Next, the processing function management means 53 causes the standby processing function 1 to be associated.
The information of No. 2 is notified to the operating system processing function 31, and the result of this selection is notified to the processing function management means 51 of the computer 1 via the path 531.

The processing function management means 51 uses the number of the computer 3 as the corresponding computer number corresponding to the identifier of the standby system processing function 12 in the processing function management table 61 ', and the operating system processing function as the corresponding operating system processing function identifier. The number of 31 is recorded, and the information of the operating system processing function 31 to be associated is stored in the standby system processing function 1
Notify 2.

As a result, the operating system processing function 31 of the electronic computer 3 and the standby system processing function 12 of the electronic computer 1 are associated so as to establish a hot standby relationship. This correspondence coincides with the standby system processing function of the computer 1 designated by the operator.

In addition, the operating system processing function 11 of the electronic computer 1
Is activated so as to be associated with the standby system processing function of the electronic computer 2, the processing function managing means 51 is given priority to the association with the standby system processing function existing in the electronic computer 2. Prompt for choice.

The processing function management means 51 comprises the priority control means 7
1, the operation processing function 11 of the processing function management table 61 '
Computer 2 to the priority computer number corresponding to the identifier of
The standby system processing functions 32 and 33 of the computer 3 are the standby system processing functions that can be associated with the active system processing function 11 by recording the number of
Therefore, the standby system processing function 32 is selected and the corresponding computer number corresponding to the identifier of the active system processing function 11 of the processing function management table 61 ′ is the computer 3 number, and the corresponding standby system processing function identifier is the standby system. Record the number of the processing function 32.
Next, the processing function management means 51 notifies the operating system processing function 11 of the information of the associated standby system processing function 32, and the result of the main selection is passed via the path 531 to the electronic computer 3
To the processing function management means 53.

The processing function management means 53 has the corresponding computer number corresponding to the identifier of the standby processing function 32 in the processing function management table 63 ', the computer 1 number, and the corresponding operating system processing function identifier, the operating system processing function. The number of 11 is recorded, and the information of the operating system processing function 11 to be associated is stored in the standby system processing function 3
Notify 2.

As a result, the active system processing function 11 of the electronic computer 1 and the standby system processing function 32 of the electronic computer 3 are associated so as to establish a hot standby relationship. This correspondence is different from the standby system processing function of the electronic computer 2 that is designated by the operator.

The operating system processing function 21 of the electronic computer 2 and the standby system processing function 33 of the electronic computer 3 are the same as the operating system processing function 11 of the electronic computer 1 and the standby system processing function 32 of the electronic computer 3. , Processing function management means 52, priority control means 72 and processing function management means 53
23 to establish a hot standby relationship. This association matches the priority designation of the operator.

By the way, in the state shown in FIG. 5, one operating system processing function 31 and two standby system processing functions 3 are provided in the electronic computer 3.
2 and 33 are operating, and the two standby system processing functions 32 and 33 are associated with the operating system processing functions 11 and 12 in the other computers 1, 2 so that the operating system processing is always performed. Processing for taking over the online data processing of the functions 11 and 12 is performed, and the load on the electronic computer 3 is higher than that of the other electronic computers 1 and 2.

When operating in the state of FIG. 5, as shown in FIG. 6, the operator uses the electronic computer 2 to operate the standby system processing function 2
When No. 2 is activated, the processing function management means 52 indicates that the operating status of the processing function has been changed to pass 512 and pass 5.
The notification is sent to the processing function management means 51 of the computer 1 and the processing function management means 53 of the computer 3 via 23 respectively.

The processing function management means 51 of the electronic computer 1 is
When it is known that the standby system processing function 22 has been activated in the electronic computer 2 via the path 512, since the active system processing function 11 is operating in the own computer 1, the priority control means 71 causes the processing function management table 61. The priority computer number (the number of the computer 2) corresponding to the identifier of the active system processing function 11 operating in the own computer 1 is acquired from '(step S201). As a result, the processing function management means 51 recognizes that the active processing function 11 gives priority to the association with the standby processing function operating in the electronic computer 2.

Next, the processing function management means 51 refers to the processing function management table 61 'and the corresponding computer number (number of the computer 3) and the priority computer number (corresponding to the identifier of the active system processing function 11). (The number of the electronic computer 2) is acquired, and it is determined whether or not the standby system processing function associated with the active system processing function 11 exists in the computer specified by the priority computer number (step S20).
2). Since the processing function management means 51 does not match the corresponding computer number (the number of the computer 3) and the priority computer number (the number of the computer 2), the standby system associated with the operating system processing function 11 It is determined that the processing function does not exist in the computer designated by the priority computer number (No in step S202), and the computer 2 designated by the priority computer number through the path 512.
From the processing function management means 52 (processing function management table 62), each information of the standby system processing function identifier operating in the computer 2, the presence / absence of correspondence, the corresponding computer number and the corresponding operating system processing function identifier is acquired (step (S203), it is checked whether or not there is a standby processing function that is not associated (step S204). Since there is a standby processing function 22 that is not associated (YES in step S205), the processing function management unit 51 associates the standby processing function 22 with the active processing function 11 by the processing of the computer 2. A request is made to the function management means 52 (step S206).

The processing function management means 52 is associated with the identifier of the standby system processing function 22 of the processing function management table 62 ', and the number of the associated computer 1 and the associated active system processing function 11 are associated with each other. Record the identifier information,
The association permission is returned to the processing function management means 51 of the electronic computer 1.

When the processing function management unit 51 receives the association permission (Yes in step S207), the association change notification unit 81 notifies the active system processing function 11 of the association change, and the standby system process already associated with it. The association with the function 32 is released, and the association release processing execution request is issued to the processing function management means 53 of the electronic computer 3 (step S208).

The processing function management means 53 determines whether or not there is a correspondence corresponding to the identifier of the standby system processing function 32 in the processing function management table 63 ', and the corresponding computer number and the corresponding operating system processing function number. Erase. Further, the processing function management means 53 notifies the standby system processing function 32 of the information of the active system processing function 11 and cancels the association with the active system processing function 11.

Next, the processing function management means 51 determines whether or not there is a correspondence corresponding to the identifier of the operating system processing function 11 in the processing function management table 61 ', and the corresponding computer number corresponds to the computer 2 , And the corresponding standby system processing function number is recorded with the number of the standby system processing function 22 to update the association. Further, the processing function management means 51 uses the correspondence change notification means 81 to associate the standby system processing function 22.
Of the above information to the operating system processing function 11 (step S2)
09).

As a result, the operating system processing function 11 of the electronic computer 1 and the standby system processing function 22 of the electronic computer 2 are associated so as to establish a hot standby relationship. This correspondence coincides with the standby system processing function of the electronic computer 2 designated by the operator.

On the other hand, the processing function management means 5 of the electronic computer 3
3 learns via the path 523 that the standby system processing function 22 has been started up in the electronic computer 2, and the operating system processing function 31 is operating in its own electronic computer 3, so the priority control means 7
3, the priority computer number (the number of the computer 1) corresponding to the identifier of the active system processing function 31 operating in the own computer 3 is acquired from the processing function management table 63 ′ (step S201). As a result, the processing function management means 53
Recognizes that the active processing function 31 gives priority to the association with the standby processing function operating in the electronic computer 1.

Next, the processing function management means 53 refers to the processing function management table 63 ′ and the corresponding computer number (number of the computer 1) and the priority computer number (corresponding to the identifier of the active system processing function 31). (The number of the electronic computer 1) is acquired, and it is determined whether or not the standby system processing function associated with the active system processing function 31 exists in the computer specified by the priority computer number (step S20).
2). Since the processing function management means 53 matches the corresponding computer number (the computer 1 number) and the priority computer number (the computer 1 number), the operating system processing function 3
It is determined that the standby system processing function associated with 1 exists in the computer specified by the priority computer number (Yes in step S202), and the process for changing the association is not performed.

As described above, the operating system processing function and the standby system processing are performed between the electronic computers intended by the operator regardless of the starting sequence of the operating system processing function and the standby system processing function in each of the computers 1, 2, 3. Correspondence with the function is performed.

As a result of searching all the standby system processing functions of the priority computer, if there is no standby system processing function that is not supported (NO in step S205 and YES in step S210), the processing function is executed. The management means 51, 52, 53 are operating system processing functions 11, 21, 3
The processing is terminated without associating the standby processing function with 1.

[0069]

As described above, according to the present invention, a mutual hot standby relationship is established between an active system processing function and a standby system processing function operating on three or more computers. In the standby system, a processing function management means for controlling the correspondence between the active processing function and the standby processing function is provided, and the processing function management means associates the active processing function with the standby processing function to establish a hot standby relationship. Due to the construction, when the standby system processing function associated with the active system processing function does not exist due to the failure of a certain electronic computer, the standby system processing function that the processing function management means can newly associate By selecting and associating with each other, a hot standby relationship can be automatically established without operator intervention, and mutual hot standby system There is an effect that it is possible to maintain the high reliability of the beam.

Further, in the mutual hot standby system in which the hot standby relationship is established between the active system processing function and the standby system processing function operating on three or more electronic computers, A processing function management means for controlling the correspondence with the standby processing function is provided, and the processing function management means controls the processing function management table and the priority order of selection of the computer on which the corresponding standby processing function is operating. Providing priority control means and correspondence change notifying means for notifying a change in correspondence between the active system processing function and the standby system processing function from the processing function management means, and the active system processing function and the standby system processing in a plurality of electronic computers By changing the correspondence according to the operating status of the function, the operating system can be activated regardless of the order in which the active system processing function and standby system processing function of each computer are activated. There is an effect that management functions are associated with priority and the standby processing function operating in the electronic computing machine specified by the operator.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a mutual hot standby system to which a mutual hot standby system standby system selection method according to a first embodiment of the present invention is applied.

FIG. 2 is a diagram showing a transition state of the mutual hot standby system shown in FIG.

FIG. 3 is a diagram showing an example of contents of a processing function management table in FIG.

FIG. 4 is a flow chart showing processing of the processing function management means in FIG. 1 when making a transition from the state of FIG. 1 to the state of FIG.

FIG. 5 is a diagram showing a configuration of a mutual hot standby system to which a mutual hot standby system standby system selection method according to a second embodiment of the present invention is applied.

6 is a diagram showing a transition state of the mutual hot standby system shown in FIG.

FIG. 7 is a diagram showing an example of the contents of a processing function management table in FIG.

FIG. 8 is a flow chart showing processing of the processing function management means in FIG. 5 when transitioning to the states of FIGS.

FIG. 9 is a block diagram illustrating a configuration of a conventional mutual hot standby system.

10 is a diagram showing a transition state of the conventional mutual hot standby system shown in FIG.

[Explanation of symbols]

1,2,3 Electronic computer 11,21,32 Operating system processing function 12,13,22,23,32,33 Standby system processing function 51,52,53 Processing function management means 61,62,63,61 ', 62 ', 63' processing function management table 71,72,73 priority control means 81,82,83 correspondence change notification means 512,523,531 path

Claims (2)

[Claims] 1. A computer comprising three or more electronic computers, which is operated by each computer so as to load-balance an active system processing function which is performing online data processing, and is online when an abnormality occurs in online data processing. Operates on its own computer in a mutual hot standby system in which the standby system processing function that takes over data processing and becomes the active system processing function and continues processing is operated by a different computer from the corresponding active system processing function Information including the identifier of the active system processing function, the identifier of the standby system processing function associated with the active system processing function so as to establish a hot standby relationship, and the number of the computer on which the standby system processing function operates, and An identifier of the standby system processing function that operates on the computer, and a hot standby relationship with the standby system processing function are built. The processing function management table for registering the identifier of the operating system processing function and the information consisting of the number of the electronic computer on which the operating system processing function is associated, and the standby system associated when a failure occurs in the electronic computer In response to a request from an operating system processing function that has no processing function, the processing function management table is referenced to select a standby system processing function that does not have an operating system processing function associated with another computer, and the request source A mutual hot standby system standby system selection method having a processing function management means for automatically establishing a hot standby relationship in association with an operating system processing function. 2. The computer is composed of three or more computers, and each computer is operated so as to distribute the load of the operating system processing function that is performing online data processing, and online when an abnormality occurs in online data processing. In a mutual hot standby system in which a standby system processing function that takes over data processing and becomes an active system processing function and continues processing is operated by a computer different from the active system processing function, operation that runs on its own computer System processing function identifier, standby system processing function identifier associated with the active system processing function so as to establish a hot standby relationship, the computer number on which the standby system processing function operates, and the standby system processing function association Information that consists of the computer number that should be prioritized, and the identifier of the standby processing function that operates on its own computer
A processing function management table for registering an identifier of an active processing function associated with the standby processing function so as to establish a hot standby relationship and information including the number of the computer on which the active processing function operates; Correspond to the standby system processing function in the processing function management table Refer to the identifier of the computer that should be prioritized, and associate it with the active system processing function Control the priority of selection of the computer in which the standby system processing function is operating When the operating status of the active system processing function and the standby system processing function in the computer changes, including priority control means and correspondence change notification means for notifying the change of the correspondence to the active system processing function and the standby system processing function. In addition, referring to the processing function management table, the active system processing function is associated with the standby system processing function that operates on a computer other than the computer indicated by the priority computer number. If so, the association between the active system processing function and the standby system processing function is canceled, and the standby system processing function of the computer whose priority is given to the association is selected and automatically associated with the requesting active system processing function. A mutual hot standby system standby system selection method having a processing function management means for changing a hot standby relationship.