JP2890962B2 - Loosely coupled multi-hot standby computer system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a loosely coupled multi-hot standby computer system.

[0002]

2. Description of the Related Art Conventionally, a loosely-coupled multi-hot standby computer system of this type has a plurality of active and standby online real-time processing systems (VIS).
And a command name of a command input by an operator and a processing system are defined in advance. Operator command distribution means for distributing a command to a processing system corresponding to the command name by command input;
IS, a logical system name meaningful to the operator is defined in advance, and a VIS location management table relating the logical system name to a VIS location required for internal processing; It has an inter-host operator command transfer means for issuing a command to a specified logical system after acquiring a VIS location from the VIS location management table when a command transmission request is issued.

When a command is transmitted to a VIS across hosts in this loosely-coupled multi-computer system, a logical system name meaningful to an operator is added to a transmission request command to refer to a VIS location management table. There is no means for recognizing whether the destination VIS state is in hot standby, and only the VIS location is acquired.
The command has been sent to the destination VIS.

[0004]

In the above-mentioned conventional method of transmitting a command to a VIS across hosts in a loosely-coupled multi-hot standby computer system, means for recognizing a destination VIS state (whether or not hot standby is in progress). Therefore, if the transmission command is issued to the transmission destination VIS when the transmission destination VIS is in hot standby, an error occurs on the transmission destination host and the transmission command is lost.

An object of the present invention is to provide a loosely coupled multi-hot standby computer system which does not cause a transmission command to be lost.

[0006]

In order to achieve the above object, a loosely-coupled multi-hot standby computer system according to the present invention, when a destination of a command is in a hot standby process, sends a command for which a transmission request is issued to a hot standby. An operator command transmission request holding table to be held until the standby processing is completed, a function of updating the VIS status and the VIS location of the VIS location management table when a hot standby occurs and the end of the hot standby, and notifying another host, Hot standby monitoring means having a function of updating the VIS status and the VIS location in the VIS location management table in response to the update notification of the VIS status and the VIS location and issuing a hot standby end notification, and transmission of various commands generated from the VIS The destination VIS responds to the destination request by hot standby processing Whether it obtained from the VIS location management table, if not in the hot standby process, transferring control to the operator command transmission means between the hosts,
If the hot standby processing is being performed, the destination logical system status checking means for stacking the operator command requested to be transmitted in the operator command transmission request holding table and the completion notice of the VIS hot standby processing are received from the hot standby monitoring means. And an operator command recovery means for acquiring the transmission request command from the operator command transmission request holding table and issuing the transmission request operator command to the operator command distribution means.

[0007]

The status of the destination VIS of the transmission request command from the operator command distribution means is stored in the operator command transmission request holding table if hot standby processing is being performed by referring to the VIS location management table. Thereafter, when the hot standby monitoring unit notifies the operator command recovery unit of the end of the hot standby state of the transmission destination VIS, the transmission request command stacked in the operator command transmission request holding table is read out and sent to the operator command distribution unit. It is turned on again.

Therefore, no transmission command is transmitted when the destination VIS is in the hot standby state.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of a loosely-coupled multi-hot standby computer system according to an embodiment of the present invention.

The system comprises two hosts 1 and 2 of this embodiment.

The host 1 includes operating VIS (on-line real-time processing system) 11, 12,..., 1n, operator command distribution means (hereinafter abbreviated as OMH) 31,
Destination logical system state checking means 32, host-to-host operator command transfer means (hereinafter abbreviated as OPM / ILF) 33, operator command transmission request holding table 34, operator command recovery means 35, VI
It comprises an S location management table 36 and a hot standby monitoring means 37.

The host 2 has an OMH 41 and an OPM / IL
F43, a VIS location management table 46, a hot standby monitoring unit 47, and standby VISs 21, 22,.
2n.

The VIS location management table 36 (46)
VIS11-1n (21-2n) logical system name, physical system name, host ID of host, VIS
The status (whether hot standby is in progress) is managed.

When the destination logical system specified by the transmission request command is in hot standby, the operator command transmission request holding table 34 holds the transmission request operator command until the hot standby processing ends.

The OMHs 31, 41 define in advance the correspondence between the transmission request operator command and the destination logical system status check means 32, and when the transmission request command is input, the OMHs 31 and 41 convert the command image to the destination logical system status check means. Distribute to 32.

Destination logical system status check means 32
Acquires the transmission request command from the OMH 31,
Referring to the IS location management table 36, if the destination VIS state is in the hot standby process, the transmission request command passed from the OMH 31 is stored in the operator command transmission request holding table 34. The intermediary operator command transfer means 33 is instructed to transfer the transmission command to the host ID where the VIS is located.

The OPM / ILF 33 obtains a transmission command image from the transmission destination logical system status checking means 32 with the host ID as a destination, and transfers the transmission command image to the OPM / ILF 43.

Upon receiving the transmission command, the OPM / ILF 43 inputs the transmission command to the OMH 41 and returns the result to the OPM / ILF 33. OPM / ILF33
Transmits the transmission command image to the OPM / ILF 43, and then monitors the OPM / ILF 33 using a timer.

Hot standby monitoring means 37 (47)
Monitors the status of the VIS 11 to 1n (21 to 2n) in its own host, and the VIS location management table 36 (4
The VIS state of 6) is changed to the hot standby, and the hot standby monitoring means 47 (37) is notified and reflected in the VIS state of the VIS location management table 46 (36).
Further, the VIS state of the VIS location management table 36 (46) is changed to the normal activation state by using the message output at the end of the hot standby processing as a trigger, and the VIS state and the VIS location are notified to the hot standby monitoring means 47 (37). , VIS location management table 46 (36). At this time, the hot standby monitoring means 37 notifies the operator command recovery means 35 that the hot standby processing has been completed.

The operator command recovery means 35
When receiving the hot standby end notification from the hot standby monitoring means 37, the operator inputs the transmission request operator command stuck in the operator command transmission request holding table 34, and inputs the transmission request operator command to the OMH 31 again.

FIG. 2 is a flow chart showing the processing in the destination logical system status check means 32 in FIG. First, a command image is obtained from the OMH 31 (step 101). Next, the command image is analyzed to obtain the logical system name of the command transmission destination VIS (step 102). Next, referring to the VIS location management table 36, the host ID where the destination VIS is located and the VIS status are acquired (step 103). Next, it is determined whether the VIS state is during the hot standby process, and the process is separated (step 104). Next, when the destination VIS is normally started, the host ID where the destination VIS is located is added to the OPM / ILF 33, and an instruction is given to transfer the transmission command (step 105). Next, the destination VIS
Store the transmission request command in the operator command transmission request holding table 34 during hot standby (step 106).

FIG. 3 is a flowchart showing the processing in the operator command recovery means 35 in FIG. First, a hot standby end notification is obtained from the hot standby monitoring unit 37 (step 201). Next, from the hot standby end notification, the name of the logical system targeted for hot standby is acquired (step 202). A transmission request command is obtained from the operator command transmission request holding table 34 (step 203). Next, a transmission request command is issued to the OMH 31 (step 20).
4). It is determined whether there is a transmission request command in the operator command transmission request holding table 34 (step 20).
5). If there is, the operations of steps 203 and 204 are repeated until there is no transmission request command (step 20).
5).

FIG. 4 is a flow chart showing the processing in the hot standby monitoring means 37 in FIG. First, a hot standby start / end notification is obtained (step 30).
1). VIS status and VI in the VIS location management table 36
The field of the location S is updated (step 302). The hot standby monitoring means 47 is notified of the change of the VIS state and the VIS location (step 303). It is determined whether it is a hot standby processing end notification (step 30).
4). If it is the hot standby processing end notification, the hot standby end is notified to the operator command recovery means 35 (step 305).

Next, a description will be given of the transmission request command recovery operation in the hot standby mode of the present embodiment thus configured.

First, an operation when a transmission request command to the active deposit processing system 22 of the host 1 is issued from the active foreign exchange processing system 11 of the host 1 while the deposit processing system 12 of the host 1 is in the hot standby mode will be described. I do. (1) When the transmission request command is issued from the active foreign exchange processing system 11, the OMH 31 transfers the command image to the transmission destination logical system check unit 32, which is associated with the transmission request command in advance. (2) When the command image is passed from the OMH 31, the transmission destination logical system check means 32 performs the following processing.

The command image is analyzed and the destination VI
It is acquired that the transmission is to the deposit processing system and the active system as the logical system name of S.

Referring to the VIS location management table 36, if the logical system is the operating system VIS1 in the deposit processing system.
2 and the VIS state (during hot standby).

Since the destination VIS 12 is in hot standby, the transmission request command is stored in the operator command transmission request holding table 34.

Next, the hot standby monitoring means 37 after the hot standby processing of the deposit processing system is completed,
The operation of 47 and the operation of the operator command recovery means 35 will be described. (3) When the hot standby monitoring unit 47 acquires the hot standby end message output to the host 2 when the hot standby of the deposit processing system ends, the hot standby monitoring unit 47 performs the following processing.

The status of the deposit processing system in the VIS location management table 46 is set to a normal status, and the location of the active VIS 12 is updated to the host 2.

Hot standby monitoring means 3 of host 1
7 is notified that the hot standby processing of the deposit processing system is completed and that the location of the active VIS 12 is the host 2. (4) The hot standby monitoring unit 37 of the host 1 that has received the notification of the completion of the hot standby from the hot standby monitoring unit 47 of the host 2 and that the location of the active VIS 12 is the host 2 performs the following processing.

The status of the deposit processing system in the VIS location management table 36 is updated to a normal state, and the location of the active deposit processing system 1 is updated to the host 2.

The operator command recovery means 35 is notified that the hot standby of the deposit processing system has been completed. (5) The operator command recovery unit 35 that has received the hot standby end notification of the deposit processing system from the hot standby monitoring unit 37 performs the following processing.

The transmission destination obtains a transmission request command to the deposit processing system from the operator command transmission request holding table 34.

The obtained transmission request command is transmitted to the OMH31.
Issue for

The processing is repeated until there is no transmission request command to the deposit processing system for the transmission destination from the operator command transmission request holding table 34. (6) When the transmission request command is issued from the operator command recovery unit 35, the OMH 31 passes the command image to the transmission destination logical system check unit 32, which is associated with the transmission request command in advance. (7) The destination logical system check means 32 receives the command image from the OMH 31 and performs the following processing.

The command image is analyzed and the destination VI
It is acquired that the transmission is to the deposit processing system and the active system as the logical system name of S.

Referring to the VIS location management table 36, if the logical system is the operating system VIS1 in the deposit processing system.
And the VIS state (normal state) of the host ID (host 2) where the server 2 is located.

When the destination VIS 12 starts normally, the OPM
The host ID (host 2) where the destination VIS 12 is located is added to the / ILF 33, and an instruction is given to transfer the transmission command. (8) Upon receiving the transmission instruction, the OPM / ILF 33 transfers the transmission command to the OPM / ILF 43 of the host 2. (9) Upon receiving the transmission command, the OPM / ILF 43 issues the transmission command to the OMH 41. (10) When the transmission command is issued from the OPM / ILF 43, the OMH 41 transfers the command image to the deposit processing system previously associated with the transmission command.

As described above, while the deposit processing system of the host 1 is in hot standby, the transmission request command issued from the active foreign exchange processing system 11 of the host 1 to the active deposit processing system 12 of the host 1 is By waiting for the hot standby processing, the hot standby processing can be transferred to the active deposit processing system 22 of the host 2 that has been changed by the hot standby.

In the above embodiment, the case where the hot standby compatible loosely-coupled multi-computer system is composed of two host computers 1 and 2 has been described, but the same applies to the case of n host computers. Needless to say, a loosely coupled multi-computer system that supports hot standby is also possible.

It is clear that the operation of the present invention can be realized even if the transmission destination is not only an online real-time processing system but also a batch control system.

[0044]

As described above, according to the present invention, if the state of the destination VIS of the transmission request command is the hot standby state, the command is stored in the operator command transmission request holding table, and the hot standby state is completed. When this is notified, the command is read from the operator command transmission request holding table and input again to the operator command distribution means, so that there is an effect that the lost transmission command is eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a loosely coupled multi-hot standby computer system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process in a destination logical system state checking means 32 in FIG. 1;

FIG. 3 is an operator command recovery unit 35 in FIG.
Is a flowchart showing the processing in.

FIG. 4 is a flowchart showing a process in a hot standby monitoring unit 37 in FIG. 1;

[Explanation of symbols]

, 1n Active online real-time processing system 21, 22,..., 2n Standby online real-time processing system 31, 41 Operator command distribution means 32 Destination logical system status check means 33, 43 Host-to-host operator command transfer means 34 Operator command transmission request holding table 35 Operator command recovery means 36,46 VIS location management table 37,47 Hot standby monitoring means

Claims (1)

(57) [Claims] 1. A plurality of active and standby online real-time processing systems (VIS), the correspondence between command names of commands input by an operator and the processing systems are defined in advance, and the command names correspond to the command names by command input. Command distribution means for distributing a command to a processing system to be executed, wherein the VIS and a logical system name meaningful to the operator are defined in advance, and the relation between the logical system name and the VIS required for internal processing is related. VIS attached
A location management table, and a host-to-host operator command for issuing a command to the specified logical system after acquiring a VIS location from the VIS location management table when a transmission request for an arbitrary command is issued by designating the logical system name A loosely coupled multi-hot standby computer system including a transfer unit, wherein when a command transmission destination is in hot standby processing, an operator command transmission request holding table for holding a command requested to be transmitted until completion of hot standby processing; When a hot standby occurs and when the hot standby ends, a function of updating the VIS status and the VIS location in the VIS location management table and notifying another host is provided.
Upon receiving the IS status and VIS location update notification, the VIS
Update the VIS status and VIS location in the location management table,
Hot standby monitoring means having a function of issuing a hot standby end notification; and
Whether or not the destination VIS is under hot standby processing is acquired from the VIS location management table. If the destination VIS is not under hot standby processing, control is passed to the inter-host operator command transmitting means. Destination logical system status checking means for stacking an operator command having a fault in the operator command transmission request holding table; and receiving a notification of completion of VIS hot standby processing from the hot standby monitoring means; A loosely-coupled multi-hot standby computer system comprising: an operator command recovery unit for acquiring the transmission request command and issuing a transmission request operator command to the operator command distribution unit. .