2.1.5 Cluster hot-standby configuration
This subsection explains the cluster hot-standby configuration that combines multiple hot-standby configurations including the 1-to-1 switchover configuration.
In the cluster hot-standby configuration, multiple server systems connected in a cluster configuration run as primary systems while they function as each other's secondary systems. A maximum of 32 server systems can be connected in a cluster hot-standby configuration.
The cluster hot-standby configuration can be achieved by running multiple servers, such as a server performing job processing and a server that stands by, in a single server system. You can also assign multiple standby servers to a server that executes a particular type of job processing.
- Organization of this subsection
(1) Example of a configuration in which a server performing job processing and a standby server have a one-to-one correspondence
The following figure shows an example of a cluster hot-standby configuration in which a server that performs job processing and a standby server have a one-to-one correspondence.
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![[Figure]](GRAPHICS/F0000020.GIF)
(2) Example of a configuration in which multiple servers stand by for a server that performs job processing
The figure below shows an example of a cluster hot-standby configuration in which multiple servers stand by for a server that performs job processing. In this example, system failures can be handled even before the primary system has been recovered from a failure because multiple servers stand by in all systems for the server that performs job processing.
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![[Figure]](GRAPHICS/F0000021.GIF)
You must use the multi-standby function to employ this configuration. For details about the multi-standby function, see 4.5 Managing servers and hosts when using the multi-standby function.