This section describes the methods of performing grouped system switchover when using HA monitor in the cluster software. To perform grouped system switchover while using cluster software other than HA monitor, see the documentation for the cluster software product.
The following explanation assumes use of grouped system switchover with HiRDB and OpenTP1.
To perform grouped system switchover, you must use the group operand of HA monitor to define grouped system switchover. The following explanation assumes that exchange is specified in the group operand. For details about defining grouped system switchover. Table 25-49 lists the system processing when performing grouped system switchover (in the server mode).
Table 25-49 System processing when performing grouped system switchover (in the server mode)
Error description | System processing | |
---|---|---|
An error occurred that prevents hardware from restarting, or an error occurred when restarting the operating system or HA monitor (a system failure occurred). | Performs system switchover. Also switches over OpenTP1 and HiRDB. | |
An error occurred in OpenTP1 and OpenTP1 terminated abnormally. | switchtype=restart | Restarts OpenTP1 on the running system. Performs system switchover if OpenTP1 cannot be restarted. When system switchover is performed on OpenTP1, grouped system switchover is also performed on HiRDB. |
switchtype=switch | Performs system switchover. When system switchover is performed on OpenTP1, grouped system switchover is also performed on HiRDB. | |
switchtype=manual | Performs system switchover. Restarts OpenTP1 on the running system. | |
An error occurred in HiRDB and HiRDB terminated abnormally. | switchtype=restart | Restarts HiRDB on the running system. Switches systems if HiRDB cannot be restarted. When system switchover is performed on HiRDB, grouped system switchover is also performed on OpenTP1. |
switchtype=switch | Performs system switchover. When system switchover is performed on HiRDB, grouped system switchover is also performed on OpenTP1. | |
switchtype=manual | Does not perform system switchover. Restarts HiRDB on the running system. |
The following explanation assumes the use of grouped system switchover with HiRDB and OpenTP1.
To perform grouped system switchover, you must use the group operand and termcommand operand of HA monitor to define grouped system switchover. The following explanation assumes that exchange is specified in the group operand. For details about defining grouped system switchover, see the manual. Table 25-50 lists the system processing when performing grouped system switchover (in the monitor mode).
Table 25-50 System processing when performing grouped system switchover (in the monitor mode)
Error description | System processing |
---|---|
An error occurred that prevents hardware from restarting, or an error occurred when restarting the operating system or HA monitor (a system failure occurred). | Performs system switchover. Also performs switchover for OpenTP1 and HiRDB. |
An error occurred in OpenTP1 and OpenTP1 terminated abnormally. | Performs system switchover. When system switchover is performed on OpenTP1, grouped system switchover is also performed on HiRDB. |
An error occurred in HiRDB and HiRDB terminated abnormally. | Does not perform system switchover. Restarts HiRDB on the running system. |
When you use HiRDB Datareplicator, you must perform grouped system switchover with both HiRDB and HiRDB Datareplicator. In such a case, use the group operand of HA monitor to define HiRDB and HiRDB Datareplicator in the same server group. For details about defining grouped system switchover. For details about performing system switchover when using HiRDB Datareplicator, see the manual HiRDB Datareplicator Version 8 Description, User's Guide and Operator's Guide.
If you define grouped system switchover in advance, you can use the planned system switchover functionality of HA monitor's monswap command to perform grouped system switchovers.