JP2768267B2 - Hot standby switching system management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loosely-coupled multiplex system (LCMP: Loos) comprising a plurality of (three or more meaningful in the present invention) host computers.
ely Coupled Multi Process
The present invention relates to a hot standby switching system management method for managing switching (switching from a standby system to an active system) in a hot standby switching system in a hot standby system.

[0002]

2. Description of the Related Art In a hot standby switching system,
Two systems (a logical system, that is, software), an active system and a standby system, both of which are running, are constituent elements, and a business system executing a predetermined business and the active system are logically connected. I have. Here, if the active system is stopped due to a failure, the operation is interrupted by switching the previous standby system (old standby system) to a new active system (new active system). Can be minimized.

Conventionally, in a hot standby switching system, an operating system and a standby system are generally provided in each of two specific host computers, and two systems constituting the hot standby switching system are provided. Which host computer it was on was predetermined.

Therefore, in the conventional hot standby switching system management system, there is no need to be aware of the locations of the two systems, and it is not necessary to manage information indicating such locations. Conversely, since the information indicating the locations of the two systems was not managed, the hot standby switching system could be constructed only in two specific host computers.

[0005] In the conventional hot standby switching system management system, switching of a connection path (session) with a business system is performed in the following procedure. Hereinafter, the physical opening / closing of a connection path is referred to as
Actually connect / disconnect wiring using an etching gate, etc.
Means to open and close the connection path logically
A system that takes over management information and connects via a connection path
Shall mean enabling / disabling communication between
You. When the switching occurs, the connection path between the old operating system and the business system is physically and logically closed. After that, the new operating system (old standby system)
Physically and logically establish a connection path between the server and the business system.

[0006] The reason why such a procedure is performed is that a connection path is physically established between both systems and the business system.
If the connection is logically established, the business system or the like cannot recognize which connection path should be used at the present time.

[0007]

In the above-described conventional hot standby switching system management method, information indicating the locations of the two systems constituting each hot standby switching system is not managed. There is a problem that it is difficult to operate a flexible hot standby switching system.

Further, in the conventional hot standby switching system management method, switching of a connection path between a business system and a physical system between a former operating system and a business system is performed.
Since the connection path between the newly operating system and the business system is physically and logically opened after the logical connection path is closed, the switching is performed when the switching occurs. Is difficult to perform at high speed.

It is an object of the present invention to provide a hot standby switching system having the following features in view of the above points.

[0010] By managing information indicating the locations of the active system and the standby system constituting the hot standby switching system, the operation of the hot standby switching system in any two of the three or more host computers can be controlled. Make it possible.

A connection path between the standby system and the business system is physically opened together with a connection path between the active system and the business system, and information on those connection paths (connection paths that are actually used) the managing information) for uniquely specifying, operating systems and business cis
If the connection route to the system is logically opened
By keeping both logically closed the connection path between the standby system and the business system, from the physical opening of a connection path between the new operating systems and business systems when switching occurs as required Enables high-speed switching.

As a conventional technique relating to the hot standby switching system, for example, a "mutual standby system" (Japanese Patent Laid-Open No. 3-105632) is disclosed. However, in this conventional technique, in a mutual standby system in which an active host computer and a standby host computer are connected via a bus, when another host computer cannot continue processing, the standby hot standby of the same group By taking over the processing in order from the job with the highest priority among the operation control jobs, the host computers that have been waiting can be started and switched in order from the job to be given priority, so that the user can see the apparent The failure time is shortened, and the switching time can be substantially reduced (see page 3 [Summary] in the specification of the publication). Therefore, the related art is different in configuration and the like from the present invention, which aims at operation of a flexible hot standby switching system in three or more host computers and high-speed switching when switching occurs.

[0013]

According to the hot standby switching system management method of the present invention, a start / stop management information table is held in a loosely coupled multiplex system including a plurality of host computers. When the start, stop, and switch of the hot standby switching system occur, the start / stop management information table is updated to reflect the start, stop, and switch, and the start / stop management information table between the active system and the business system of the host computer is updated. A hot-standby switching system start / stop management means on each host computer for controlling establishment of a connection path and a connection path between the standby system and the business system; and a location management information table . Hot stamba
B. Information on start, stop, and switching of all hot standby switching systems in the loosely coupled multiplex system sent from the switching system start / stop management means.
All updates the location management information table and hot standby switching system location management file on the basis of the distribution
Hot standby switching on any one host computer that manages the location of the hot standby switching system and manages information that specifies the connection path between the current operating system and the business system of each hot standby switching system System location management means.

In the hot standby switching system management method of the present invention, the active hot standby switching system location management means is provided on any one host computer, and the standby hot standby switching system location management means is provided separately. The standby system hot standby switching system location management means is switched to the active system hot standby switching system location management means when the active system hot standby switching system location management means is provided on any one of the host computers. It is also possible to operate it.

[0015]

According to the hot standby switching system management method of the present invention, the hot standby switching system start / stop management means on each host computer holds a start / stop management information table, and starts the hot standby switching system in its own host computer. , Stop and switch, the start / stop management information table is updated to reflect the start, stop, and switch, and the connection path between the active system and the business system for the local host computer and the standby system are updated. Controls the establishment of a connection path with the business system. Further, the hot standby switching system location management means on any one host computer (or the hot standby switching of the active system among the active and standby hot standby switching system location management means on any two host computers) System location management means) stores a location management information table, and stores hot information on each host computer.
Sent from standby switching system start / stop management means
Start, stop, and switch for all hot standby switching systems in an incoming loosely coupled multiplex system
All of the information to update the location management information table and hot-standby switching system location management file on the basis of
Manages the location of the hot standby switching system, and manages information for specifying the connection path between the operating system and the business system of each hot standby switching system at the present time.

[0016]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a loosely coupled multiplex system to which a hot standby switching system management system according to an embodiment of the present invention is applied.

This loosely coupled multiplex system comprises host computers 1, 2 and 3, a hot standby switching system location management file 9, business systems 81 and 8
2 is included.

Each of the host computers 1, 2, and 3 (each of all the host computers in the loosely coupled multiplex system) has a start / stop management information table 101,
A hot standby switching system start / stop management means 41, 42 and 43 having 102 and 103 is provided. Further, each host computer 2 and 3
(Each of any two host computers in the loosely coupled multiplex system) has a location management information table 11
1 and 112 are provided.

Here, the pair of the hot standby switching system location management means 51 and 52 is configured as one hot standby switching system in which the former is an operating system. However, it is guaranteed with high accuracy that the hot standby switching system location management means does not stop, or the hot standby switching system group to be managed is not restarted until the hot standby switching system location management means stops due to a failure or the like and restarts. In the case where it is guaranteed that no state change will occur, the hot standby switching system management method of the present invention can be realized by providing only one hot standby switching system location management means on any one host computer. It is possible to In this case, at the time of restart after the hot standby switching system location management means is stopped,
The location management information table (location management information table 111 in FIG. 1) is recovered using the hot standby switching system location management file (hot standby switching system location management file 9 in FIG. 1).

In any two of the host computers 1, 2, and 3, there are some hot standby switching systems composed of a pair of an active system and a standby system. In this embodiment, at first, a hot standby switching system 60 and a system 71 (active system) and a system 72 (standby system) are constituted by a pair of a system 61 (active system) and a system 62 (standby system). It is assumed that there is a hot standby switching system 70 and the like constituted by the pair.

FIGS. 2A to 2C are flowcharts showing processing when the active system is stopped in the hot standby switching system management system of the present embodiment. This processing includes an old active system stop recognition step 211, a start / stop management information table update step 212, a hot standby switching system location management means notification step 213, and a location management information table update step 214.
A new active system switching recognition step 221, a start / stop management information table updating step 222, a hot standby switching system location management unit notification step 223, and a location management information table updating step 224.
, A new active system response step 225, a task start request notification step 226, a new standby system startup recognition step 231, a start / stop management information table update step 232, and a hot standby switching system location management means notification step 233. , A location management information table update step 234, a hot standby switching system start / stop management means response step 235, a start / stop management information table update step 236, and a connection path opening step 237.

FIG. 3 shows the start / stop management information table 10.
FIG. 3 is a diagram illustrating a configuration of 1, 102, or 103. Start-up/
The stop management information table 101, 102 or 103
An entry is made for each hot standby switching system (a hot standby switching system in which an active system or a standby system of a component exists in the own host computer) related to the own host computer (the host computer 1, 2, or 3 in which the host computer exists). And a hot standby switching system ID (IDenti) which is identification information of the hot standby switching system.
operation / standby system identification information indicating which of the active system and the standby system exists in the local host computer, and the active system or the standby system in the local host computer being established between the business system and the business system. Each entry includes connection path identification information indicating whether the connection path being used is an initial operation connection path or an initial standby connection path.

FIG. 4 is a diagram showing the structure of the location management information table 111 or 112. The location management information table 111 or 112 has an entry for each of the hot standby switching systems existing in the loosely coupled multiplex system, and includes a hot standby switching system ID, an active system, which is identification information of the hot standby switching system. Active system location information indicating the host computer where the system exists, standby system location information indicating the host computer where the standby system exists, and whether the connection path used by the active system is the initial operating system connection path The active system in-use connection path identification information indicating whether the path is the initial standby system connection path is included in each entry.

FIGS. 5 and 6 are block diagrams for explaining the specific operation of the hot standby switching system management system of this embodiment.

Next, the operation of the thus configured hot standby switching system management system of this embodiment will be described.

First, the operation at the time of starting a certain hot standby switching system will be described.

Here, a hot standby switching system 60 (a hot standby switching system connected to the business system 81) constituted by a pair of an operating system 61 and a standby system 62 is newly activated. Consider the operation in case.

In this case, the hot standby switching system start / stop management means 43 on the host computer 3 in which the system 61 exists recognizes that the system 61 has been started as the active system of the hot standby switching system 60.

The hot standby switching system start / stop management means 43 updates the start / stop management information table 103 based on the recognition. That is, an entry relating to the hot standby switching system 60 is newly provided in the start / stop management information table 103, and “information indicating the hot standby switching system 60” is set in the item of the hot standby switching system ID in the entry. / Set "Active" in the item of standby system identification information and "Initial operating system connection route" in the item of connection route identification information.
Set.

The hot standby switching system start / stop management means 43 physically establishes a connection path between the system 61 and the business system 81.

Further, the hot standby switching system start / stop management means 43 is provided to the hot standby switching system location management means 51 by the system 61 as an operating system of the hot standby switching system 60.
Notify that has started.

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification from the hot standby switching system start / stop management means 43. That is, an entry relating to the hot standby switching system 60 is newly provided in the location management information table 111, and “information indicating the hot standby switching system 60” is set in the item of the hot standby switching system ID in the entry, and the active system location is set. “Information indicating the host computer 3” is set in the information item, and “initial operating system connection route” is set in the active system in-use connection route identification information item. at the same time,
The hot standby switching system location management means 51
The content of the hot standby switching system location management file 9 is also updated so that the content of the location management information table 111 and the content of the hot standby switching system location management file 9 become the same.

Further, the hot standby switching system location management means 51 sends, via the hot standby switching system start / stop management means 43, a response to the effect that the location management information table 111 regarding the activation of the system 61 has been updated. Return to 61.

Upon receiving this response, the system 61, which is the operating system, notifies the business system 81 of a business start request. As a result, the business system 81 recognizes that the active system in the hot standby switching system 60 is the system 61 (the business system 81 recognizes that the system with which communication is to be performed is the system 61). The connection path to the system 81 is logically connected (opened).

On the other hand, the hot standby switching system start / start on the host computer 2 in which the system 62 exists.
The stop management unit 42 recognizes that the system 62 has started as a standby system of the hot standby switching system 60.

The hot standby switching system start / stop management means 42 updates the start / stop management information table 102 based on the recognition. That is, an entry relating to the hot standby switching system 60 is newly provided in the start / stop management information table 102, and “information indicating the hot standby switching system 60” is set in the item of the hot standby switching system ID in the entry, and / Set "Standby" in the item of standby system identification information, and set "Initial standby system connection route" in the item of connection route identification information.
Set.

The hot standby switching system start / stop management means 42 physically establishes a connection path between the system 62 and the business system 81.

Further, the hot standby switching system start / stop management means 42 is provided to the hot standby switching system location management means 51 by the system 62 as a standby system of the hot standby switching system 60.
Notify that has started.

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification from the hot standby switching system start / stop management means 42. That is, “information indicating the host computer 2” is set in the item of the standby system location information in the entry relating to the hot standby switching system 60.

The system 62 which is a standby system
Does not notify the business system 81 of the business start request. Also, as already mentioned, the system 61
Has notified the business system 81 of a business start request. Therefore, even if a connection path is physically established between the system 62 and the business system 81, the connection path is logically closed, and the business system 8
Regarding two connection paths related to 1, the connection path to be used is specified as one path.

In the loosely coupled multiplex system, the operation described above is performed at first, and the system 71 as an active system is activated on the host computer 1 and the standby system on the host computer 2. System 6
2 and the system 72 are activated, and the system 61 which is an operating system is activated on the host computer 3 (see FIG. 5). Here, one hot standby switching system 60 is constituted by a pair of a system 61 which is an active system and a system 62 which is a standby system, and a system 71 which is an active system and a system 72 which is a standby system. Constitute one hot standby switching system 70. As for the contents of the system, the system 61 and the system 62 are the same, and the system 71 and the system 7
2 (and the system 73 described later) are the same. The hot standby switching system 60 is connected to the business system 81 (more precisely, the operating system 61).
A connection path is physically established between the standby system 62 and the business system 81, and a connection path between the active system 61 and the business system 81 is logically connected. State), the hot standby switching system 70 is connected to the business system 82.

Second, the operation when the active system in a certain hot standby switching system is stopped and the old standby system is operated as the new active system will be described (see FIGS. 2A to 2C). ).

Here, the system 71 which is the old operating system is stopped, and the system 72 which is the old standby system is stopped.
Let's consider a case in which is a newly operating system. Note that such switching is performed by the hot standby switching system 70.
It is performed under its own control (when the system 71 stops, the connection path used by the system 71 is closed).

Operation based on recognition of stoppage of old operating system (system 71) (see FIG. 2A)

When recognizing the stop of the system 71 (step 211), the hot standby switching system start / stop management means 41 updates the start / stop management information table 101 to reflect the stop (step 212).
That is, the entry related to the hot standby switching system 70 is deleted.

The hot standby switching system start / stop management means 41 notifies the hot standby switching system location management means 51 that the system 71 has been stopped (step 213).

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification (step 214). That is, the “information indicating the host computer 1” in the item of the active system location information in the entry relating to the hot standby switching system 70 is deleted, and the “initial operating system connection path” in the item of the active system in-use connection path identification information is deleted. (These items are space-cleared). At the same time, the hot standby switching system location management means 51 updates the hot standby switching system location management file 9 by reflecting the updated contents of the location management information table 111 (location management information table 1).
The process of synchronizing the update of the update 11 with the update of the hot standby switching system location management file 9 is omitted in the following description).

Operation based on recognition of switching of the old standby system (system 72) to the new standby system (FIG. 2)
(See (b))

When the hot standby switching system start / stop management means 42 recognizes that the system 72 has been switched from the standby system to the active system (step 221), the start / stop management information table 102 reflects the switching. Is updated (step 222). That is, the item of the active / standby identification information in the entry related to the hot standby switching system 70 is set to “standby”.
To "active". It should be noted that “initial standby connection path” is still set in the connection path identification information item in this entry.

The hot standby switching system start / stop management unit 42 notifies the hot standby switching system location management unit 51 that the system 72 has been switched to the active system (step 223).

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification (step 224). That is, “information indicating the host computer 2” is set in the item of the active system location information in the entry relating to the hot standby switching system 70, and “information indicating the host computer 2” in the item of the standby system location information is deleted. Then, "initial standby connection path" is set in the item of the active system use connection path identification information.

Further, the hot standby switching system location management means 51 sends, via the hot standby switching system start / stop management means 42, a response to the effect that the location management information table 111 for the switching of the system 72 has been updated. 72 (step 225).

The system 72, which is a new operating system,
When this response is received, a task start request is notified to the task system 82 (step 226). This allows
The business system 82 is a hot standby switching system 7
0, the active system is recognized as the system 72 (the system to be communicated has been changed), and the connection path between the system 72 and the business system 82 is logically connected (opened). become. Here, the system 72 and the business system 82, which are newly operating systems,
Since the initial standby connection path is established as a connection path between the hot standby switching system 70 and the business system 82 after the switching, the initial standby connection path is used. .

Operation based on recognition of activation of the new standby system (system 73) (see FIG. 2C)

Here, as a new standby system in the hot standby switching system 70, a system 73 is activated on the host computer 3 based on a user's instruction or the like (see FIG. 6).

In this case, the hot standby switching system start / stop management means 43 on the host computer 3 where the system 73 exists recognizes that the system 73 has started as a standby system (step 23).
1) Update the start / stop management information table 103 based on the recognition (step 232). That is, an entry relating to the hot standby switching system 70 is newly provided, and “hot standby switching system 70” is added to the item of the hot standby switching system ID in the entry.
Is set, and “standby system” is set in the item of active / standby system identification information.

Also, the hot standby switching system start / stop management means 43 notifies the hot standby switching system location management means 51 that the system 73 has been started as the standby system of the hot standby switching system 70 (step). 233).

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification from the hot standby switching system start / stop management means 43 (step 234). That is, “information indicating the host computer 3” is set in the item of the standby system location information in the entry related to the hot standby switching system 70.

The hot standby switching system location management means 51 refers to the location management information table 111 to check the connection route, and establishes an initial standby system between the newly operating system 72 and the business system 82. The hot standby switching system start / stop management unit 43 recognizes that the connection path is being used, and sends a response prompting the establishment of the initial operation system connection path between the system 73, which is the new standby system, and the business system 82. Return (step 235).

On the basis of this response, the hot standby switching system start / stop management unit 43 adds “initial operating system” to the connection path identification information item in the entry for the hot standby switching system 70 in the start / stop management information table 103. "Connection route" (step 23)
6).

The hot standby switching system start / stop management means 43 physically establishes a connection path, which is an initial operation system connection path, between the system 73 and the business system 82 based on the response described above ( Step 23
7).

Through the above operations (1) to (4), the loosely coupled multiplex system changes from the state shown in FIG. 5 to the state shown in FIG. 6, and reflects the start / stop management information table 101, Each of 102 and 103 and the location management information table 111 are updated.

Third, the operation when the standby system in a certain hot standby switching system is stopped will be described.

In this case, since there is no hindrance to the immediate operation, the operation may be continued as it is. However, in order to guarantee the operation as the hot standby switching system, it is possible to activate the new standby system. preferable.

Here, it is assumed that the system 62 which is a standby system is stopped in the state of FIG.

In this case, first, the following processing is performed as an operation based on recognition of the stoppage of the old standby system (system 62).

When the hot standby switching system start / stop management means 42 recognizes the stop of the system 62,
Start / stop management information table 102 reflecting the stop
To update. That is, the entry related to the hot standby switching system 60 is deleted.

The hot standby switching system start / stop management means 42 notifies the hot standby switching system location management means 51 that the system 62 has been stopped.

The hot standby switching system location management means 51 updates the location management information table 111 based on the notification. That is, the “information indicating the host computer 2” in the item of the standby system location information in the entry related to the hot standby switching system 60 is deleted.

Further, an operation based on the recognition of the activation of the new standby system is performed by the same processing as in the second case described above. However, activation of the new standby system is not an urgently necessary process.

Fourth, the operation when the hot standby switching system start / stop management means 41, 42 or 43 is stopped and then restarted will be described.

Here, it is assumed that immediately after the state of FIG. 6 is reached, the hot standby switching system start / stop management means 43 on the host computer 3 is brought into a failure state and stopped, and then restarted.

When the hot standby switching system start / stop management means 43 stops, the information in the start / stop management information table 103 disappears. Also, even if the system (at this time, the system 61 and the system 73) constituting the hot standby switching system related to the host computer 3 is started, stopped, and switched during the stop, the information is stored in the location management information table 111. Is not reflected in Therefore, when the hot standby switching system start / stop management unit 43 is restarted in the host computer 3, the start / stop management information (information in the start / stop management information table 103) before and after the stop is taken over as follows. It is necessary to update the location management information (information in the location management information table 111).

The restarted hot standby switching system start / stop management means 43 sends the hot / standby management information (takeover before and after the stop) to the hot standby switching system location management means 51 and the host computer. Inquire about the information related to the hot-standby switching system regarding No. 3.

The hot standby switching system location management means 51 refers to the location management information table 111 and
At the present time (for the host computer 3, the hot standby switching system start / stop management unit 43 is stopped), the business system 81 is displayed on the host computer 3.
There is a system 61 (operating system) connected to the business system 82 via the initial operating system connection path, and a system 73 (standby system) connected to the business system 82 via the initial operating system connection path. Recognize that

The hot standby switching system location management means 51 returns a response having information indicating the recognition to the hot standby switching system start / stop management means 43.

The hot standby switching system start / stop management means 43 updates (recovers) the start / stop management information table 103 based on the information obtained by this response.

Further, the hot standby switching system start / stop management means 43 compares the information in the boot / stop management information table 103 after recovery with the current status of the hot standby switching system on the host computer 3. If there is one, the start / stop management information table 103 is updated, and the fact is notified to the hot standby switching system location management means 51.

The hot standby switching system location management means 51 updates the information in the location management information table 111 based on this notification.

Fifth, the operation when the hot standby switching system location management means 51 stops will be described. When the hot standby switching system location management unit 51 stops operating, the information in the location management information table 111 disappears.

In this case, the hot standby switching system location management means 52 paired with the hot standby switching system location management means 51 is switched from the standby system to the active system.

The hot standby switching system location management means 52 stores the contents of the hot standby switching system location management file 9 (the contents of the location management information table 111 at the time when the hot standby switching system location management means 51 stops) in its own. It is set in the location management information table 112.

Next, the hot standby switching system location management means 52 is connected to the host computers 1, 2, and 3.
The location management information table 112 and the start / stop management information table 10 are exchanged between the hot standby switching system start / stop management means 41, 42, and 43 existing above.
Matching of information between 1, 102 and 103 is performed. If the status of each of the hot standby switching systems 60 and 70 has changed during the switching of the operating system from the hot standby switching system location management unit 51 to the hot standby switching system location management unit 52, the hot standby switching is performed. The system location management means 52 reflects the change in the location management information table 112.
Update the information in.

Further, the hot standby switching system location management means 52 notifies the hot standby switching system start / stop management means 41, 42, and 43 that it has changed from the standby system to the active system.

Thus, after that, the hot standby switching system location management means 52 is set as the active system, and the same processing as before is continued.

Sixth, the operation when the host computer 1, 2, or 3 is stopped due to a failure and then restarted will be described.

Here, it is assumed that the host computer 2 in FIG. 1 (the host computer in which the active hot standby switching system location management means 51 exists) is stopped due to a failure, and then restarted.
The operation performed when a host computer other than the host computer in which the active hot standby switching system location management unit 51 is present is stopped in the following operation in the hot standby switching system location management unit 5.
There is no operation related to 1.

When the host computer 2 is stopped, first, the operating system of the hot standby switching system constituted by the hot standby switching system location management means 51 and 52 is switched from the hot standby switching system location management means 51 to the hot standby switching. The mode is switched to the system location management unit 52. The processing at that time is the same as the operation in the above-described fifth case.

Next, with the stoppage of each system on the host computer 2 (system constituting the hot standby switching system), another host computer 1 or 3
Switching and activation of the above system are performed. The processing at that time is the same as the operation in the above-described second or third case.

Thereafter, when the host computer 2 is restarted, the hot standby switching system start / stop management means 42 on the host computer 2 is restarted accordingly.

In this case, since each system on the host computer 2 (system constituting the hot standby switching system) is also stopped when the host computer 2 is stopped, it is not necessary to take over the start / stop management information. . Therefore, the hot standby switching system start / stop management unit 42 performs, as in the above-described fourth case,
It is not necessary to make an inquiry to the hot standby switching system location management means 52.

Instead, the hot standby switching system start / stop management means 42 sends an initialization request to the hot standby switching system location management means 5 at the time of restart.
Notify 2.

The hot standby switching system location management means 52 deletes information on the hot standby switching system relating to the host computer 2 in the location management information table 112 and the hot standby switching system location management file 9 based on the initialization request. (However, some information has already been deleted at this time based on the notification from the hot standby switching system start / stop management means 41 or 43 on the host computer 1 or 3).

[0095]

As described above, the present invention enables the operation of the hot standby switching system in any two of the three or more host computers, thereby providing a flexible hot standby system in a loosely coupled multiplex system. This has the effect that the operation of the standby switching system becomes possible.

Also, a connection path between the standby system and the business system is physically opened in addition to a connection path between the active system and the business system, and information on those connection paths is managed to operate the system. System and business system
If the connection route to the system is logically opened
In both cases, by logically closing the connection path between the standby system and the business system, there is no need to physically open the connection path between the new operating system and the business system when switching occurs, faster switching of hot standby switching system (including fast recovery, etc. of the management information on hot standby switching system)
There is an effect that can be realized.

The effects described above bring about the realization of a highly reliable system on a loosely coupled multiplex system.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a loosely coupled multiplex system to which a hot standby switching system management method according to an embodiment of the present invention is applied.

FIG. 2 is a flowchart showing processing when the active system is stopped in the hot standby switching system management system shown in FIG. 1;

FIG. 3 is a diagram showing a configuration of a start / stop management information table in FIG. 1;

FIG. 4 is a diagram showing a configuration of a location management information table in FIG. 1;

FIG. 5 is a block diagram for explaining a specific operation of the hot standby switching system management method shown in FIG. 1;

FIG. 6 is a block diagram for explaining a specific operation of the hot standby switching system management system shown in FIG. 1;

[Explanation of symbols]

1, 2, 3 Host computer 9 Hot standby switching system location management file 41, 42, 43 Hot standby switching system start / stop management means 51, 52 Hot standby switching system location management means 61, 62, 71, 72, 73 System 81 , 82 business system 101, 102, 103 start / stop management information table 111, 112 location management information table

Claims (3)

(57) [Claims] In a loosely coupled multiplex system including a plurality of host computers, a start / stop management information table is retained, and when a start, stop, and switch of a hot standby switching system occur in a host computer of the loosely coupled multiplex system. The activation,
The start / stop management information table is updated to reflect the stop and switch, and the connection path between the active system and the business system and the connection path between the standby system and the business system for the host computer are opened. a hot standby switching system start / stop manager on each host computer to control, holds location management information table, wherein each host computer
Standby switchover system start / stop pipe
The location management information table and the hot standby switching system location management file are updated on the basis of the start, stop, and switching information on all the hot standby switching systems in the loosely coupled multiplex system sent from the management means, and all the hot standby switching systems are updated . Hot standby switching system
And managing the location of the stem, hot standby switching system location management means on any one of a host computer that manages the information for identifying the connection path between the operating systems and business systems at the present time of each hot standby switching system And a hot standby switching system management method. 2. An active hot standby switching system location management means exists on any one host computer, and a standby hot standby switching system location management means exists on another arbitrary host computer. 2. The system according to claim 1, wherein when the active hot standby switching system location management means is stopped, the standby hot standby switching system location management means is switched to the active hot standby switching system location management means for operation. The hot standby switching system management method described. 3. The start / stop management information table has a hot standby switching system ID, active / standby system identification information, and connection path identification information, and the location management information table has a hot standby switching system ID, active system location. 3. The hot standby switching system management method according to claim 1, wherein the system has information, standby system location information, and active system use connection path identification information.