JP2591334B2 - Mutual standby system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mutual standby system, and more particularly to a host having a plurality of business processing systems, where the processing capacity of the highest-priority active business processing system falls below a threshold. When the information processing system user requests disconnection of the device related to the processing capability of the information processing system when switching the host in the case of When it is determined that the threshold value does not occur, the device is not disconnected, and when it is determined that the state does not fall below the threshold, the device is disconnected.
The present invention relates to a device separation control method for the processing capability of an information processing system in a mutual standby system for the purpose of enhancing the reliability of the highest priority operation business processing system.

[Conventional technology]

Conventionally, a mutual standby system has a plurality of hosts, each of which constitutes a system comprising an information processing system having a plurality of processing devices, and a plurality of business processing systems in each of the information processing systems. Among the plurality of business processing systems, the one that is currently executing active business processing is called the active business processing system, and the active business processing system that is a pair of the active business processing system in the system of this host and another host In this connection, the other host side is called a standby service processing system, and is configured to form a paired group, and mutually maintain a standby state. Therefore, although the description is duplicated, the active business processing system that performs the processing requested by the information processing system user and the standby business processing system that takes over the business in the event of a failure in the active business processing system are grouped into one group. Have different running business processing systems and standby business processing systems, monitor each other while performing their respective business operations, and when another host becomes in a processing continuation impossible state, for example, it becomes a processing continuation impossible state By taking over the task to the standby task processing system of the own host that is in the same group as the active task processing system of the other host, the information processing system user does not seem to be in the processing continuation impossible state. In such a mutual standby system, which is a highly reliable system, in a host having a plurality of business processing systems, the processing capacity of the highest-priority active business processing system among a plurality of business processes to be processed by the host is in a state where the processing capacity is below a threshold. That is, the threshold value here means, for example, a CPU (Central Processing Unit for performing processing), an IOP in a host system in a plurality of business processes to be processed.
(I / O controller that controls input and output with peripheral devices),
The number of devices (border line) that are indispensable for processing each device type such as memory (main storage device).
The threshold cracking is, for example, the number of hosts in the entire system and is a device relating to the processing capability of the information processing system, such as CPU, IO
P, the number of each device type (number of devices) indicated by each number of memories, etc., and the CPU of each business processing system operated by the host
And the threshold number, the IOP and the threshold number, the memory and the threshold management table indicated by the threshold number, and the number of devices for each device type in the system with respect to the number of each device stored in the threshold management table Is a state in which one of the tasks is insufficient, and the processing capacity of the highest-priority active business processing system is below the threshold value, which means that there is a priority to execute multiple business processing, and the highest priority business processing in the business For the processing capacity of the active business processing system, which is a threshold for each device type that is indispensable for executing the process, a threshold cracking state in which one of the number of devices in the host system becomes insufficient, Even in the case where the threshold value is broken, when the information processing system user of the system requests disconnection in order to disconnect some of the devices related to the processing capability of the information processing system, the information is stored in the threshold management table. C Regardless of the number of devices such as PUs, IOPs, or memories and the number of devices requested to be disconnected in the entire system, devices have been unconditionally disconnected in response to the disconnection request.

[Problems to be solved by the invention]

In the mutual standby system described above, in a host having a plurality of business processing systems, when the processing capacity of the highest priority active business processing system falls below a threshold,
When the information processing user requested disconnection of the device related to the processing capability of the information processing system, the device was unconditionally disconnected. There is a drawback in that the capability is in a state of being separated from the threshold, the highest priority business process cannot be executed, and high reliability as a mutual standby system cannot be guaranteed.

[Means for solving the problem]

According to the present invention, there is provided a plurality of hosts including a plurality of processing apparatuses and including a plurality of business processing systems, and one active business processing system of the business processing systems and the active business processing A mutual standby system that forms a group with a standby business processing system for standby of another host to be paired with each other and is in a standby state mutually, wherein each of the hosts includes a plurality of processing devices. A device number management unit that manages the number of devices for each device type; a threshold management unit that manages a threshold value that is the number of devices for each device type required for performing a business process for each business process in the business processing system; A disconnection determination unit that determines whether disconnection is possible when a request for disconnection of some of the plurality of processing devices is provided, wherein the disconnection determination unit determines the number of devices managed by the device number management unit. About Subtract the number of devices of the threshold managed by the threshold management unit from the number of devices after disconnection of the some devices scheduled by the disconnection request and take the difference. A mutual standby system is provided in which the disconnection is not performed when the priority processing becomes a threshold value where the difference becomes negative.

〔Example〕

Next, the present invention will be described with reference to the drawings. First
FIG. 1 is a block diagram showing an embodiment of the present invention. The mutual standby system shown in FIG. 1 comprises a host 1 and a host 2, and the host 1 and the host 2 are connected via a path 3. In the host 1 and the host 2, the priority of a group 31 composed of the active business processing system 11 of the host 1 and the standby business processing system 21 of the host 2 is 41, and the active business processing system 12 and the host 2 of the host 1 It is assumed that the priority of the group 32 including the standby service processing system 22 of the group 32 is 42, and the priority 41 of the group 31 is higher than the priority 42 of the group 32.

The host 1 is the active business processing system 11 included in the group 31
, An active business processing system 12 included in the group 32, a threshold management table 13 for each business processing system, and a threshold management table 13 for each business processing system
14, a device number management table 15 relating to the processing capability of the information processing system, a unit 16 referring to the device number management table 15 relating to the processing capability of the information processing system, and separation of the device relating to the processing capability of the information processing system It is configured to include a notice notification receiving means 17.

The host 2 is a standby business processing system 21 included in the group 31
And the standby business processing system 22 included in the group 32, the threshold management table 23 of each business processing system, and the threshold management table 23 of each business processing system
24, a device number management table 25 relating to the processing capability of the information processing system, a unit 26 referring to the device number management table 25 relating to the processing capability of the information processing system, and separation of the device relating to the processing capability of the information processing system. It is configured to include a notice notification receiving means 27.

Next, a description will be given of the disconnection control of the apparatus relating to the processing capability of the information processing system in the mutual standby system of FIG.

In FIG. 1, when the information processing system user starts using the host 1 and the host 2 as a mutual standby system and then requests the host 1 to disconnect the device relating to the processing capability of the information processing system, the host 1 Means 16 for referring to the number-of-devices management table 15 relating to the processing capability of the information processing system existing in the system, the number of current devices relating to the processing capability of the information processing system is recognized, and the processing capability of the information processing system after the device is disconnected is recognized. Predict the number of devices. Next, the means 14 referring to the threshold management table 13 of each business processing system recognizes the threshold value of the highest-priority active business processing system 11 in its own host, and determines the processing capacity of the information processing system after the device is disconnected. Compare with the predicted number. Now, assuming that the threshold value of a certain type of device in the active business processing system 11 is “3” and the predicted number after the device is separated is “2”, the active business processing system having the highest priority is determined by the separation of the device. 11 is determined to be below the threshold value, and thus the device is not disconnected. Conversely, assuming that the threshold value of the active business processing system 11 is “3” and the predicted number after the device disconnection is “4”, the active business processing system 11 having the highest priority is determined by the disconnection of the device. It is determined that the state does not fall below the threshold, and thus the device is disconnected.

As described above, the disconnection control method of the device relating to the processing capacity of the information processing system in the mutual standby system is based on the fact that the host having a plurality of business processing systems has a processing capacity of the highest priority active business processing system in a state where the threshold is broken. When the host is switched, the threshold management number of each business processing system, means for referring to the threshold management table of each business processing system, a device number management table related to the processing capacity of the information processing system, Means for referring to the number-of-devices management table relating to the processing capacity of the information processing apparatus, and receiving means for receiving a notice of disconnection of the apparatus relating to the processing capacity of the information processing system. When a disconnection is requested, if the active business processing system with the highest priority falls below the threshold due to the disconnection of the device, the disconnection determination unit determines In such a case, by not disconnecting the device, it is possible to prevent a situation in which the highest-priority business process is stopped or stopped due to a threshold of the processing capacity of the highest-priority active business processing system being stopped, and the device is disconnected. Even if the highest priority operation business processing system does not fall below the threshold,
When the determination is made by the disconnection determination unit, by performing the disconnection of the device, the unnecessary device is disconnected, and as a result, the power consumption in the host system is reduced.
The reliability of the highest priority operation business processing system is improved by reducing the interference of signals from non-operational devices.

〔The invention's effect〕

As described above, according to the present invention, in a mutual standby system, when a host having a plurality of business processing systems requests an information processing system user to disconnect a device related to the processing capability of the information processing system, If it is determined that the separation of the highest-priority active business processing system is caused by the disconnection, the device is not disconnected, so that the highest-priority active business processing system has the highest priority due to the lower threshold of the processing capacity. Prevent interruption of business processes in the priority order, etc., and if it is determined that the highest-priority active business processing system does not fall below the threshold even if the device is disconnected, disconnect the device. If the information processing user requests disconnection from the host system, unnecessary devices such as devices that are considered to be non-use in the future or devices that need to be repaired Ri away, there is an effect that it is possible to enhance the reliability of the operating business processing system of the highest priority.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, 1... Host, 2... Host 2, 3... Path connecting host 1 and host 2, 11... ... A threshold management table of each business processing system existing in the host 1; 14 means for referring to a threshold management table of each business processing system existing in the host 1; ... Means for referencing the number-of-devices management table relating to the processing capability of the existing information processing system, 16... Means for referencing the number-of-devices management table relating to the processing capability of the information processing system existing in the host 1; Means for receiving notice of disconnection notice of device related to processing capacity, 21...
Active business processing systems existing in the host 2, 23... Threshold management table of each business processing system existing in the host 2,..., Means for referring to the threshold management table of each business processing system existing in the host 2, 25
... A device number management table relating to the processing capacity of the information processing system existing in the host 2, 26... Means for referring to the device number management table relating to the processing capability of the information processing system existing in the host 2, 27.
Means for receiving a notice of device separation notice relating to the processing capacity of the information processing system existing in the host 2, a group consisting of the active business processing system 11 existing in the host 1 and the standby business processing system 21 existing in the host 2, 32 ... The active business processing system 12 existing on the host 1 and the standby business processing system existing on the host 2
The group consisting of 22; 41 ... the priority given to group 31; 42 ... the priority given to group 32.

Claims (1)

(57) [Claims] 1. A host system comprising a plurality of processing apparatuses and a plurality of hosts having a plurality of business processing systems therein, wherein one of the business processing systems is an active business processing system between the hosts. A mutual standby system that forms a group with a standby business processing system for standby of another host to be paired with each other and is in a standby state with each other, wherein each host has a device of the plurality of processing devices. A number-of-apparatus management unit that manages the number of apparatuses for each type; a threshold management unit that manages a threshold value that is the number of apparatuses for each type of apparatus necessary for performing business processing for each business processing in the business processing system; Disconnection determination unit that determines whether disconnection is possible when there is a request for disconnection of some of the processing devices, wherein the disconnection determination unit determines the number of devices managed by the device number management unit. Before Subtract the number of devices of the threshold managed by the threshold management unit from the number of devices after the separation of some of the devices scheduled by the disconnection request and take the difference, and take the highest priority among the operations of the active business processing system. The mutual standby system is characterized in that the disconnection is not performed when the job processing of the rank falls below the threshold value where the difference is negative.