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A Manager requests Manager fault tolerance with the MANAGER_FAULT_TOLERANT configuration option and by providing a command identifier (command ID) using the COMMAND_ID configuration option. The command ID identifies the unit of work being executed. In this context, a unit of work includes the Manager, Server, and user process.
The Manager indicates to the Server that this request is restartable. The COMMAND_ID configuration option provides a command identifier that uniquely identifies the Server and user process on the remote host. When a Manager is restarted, it must provide the same command ID identifying the Server and user process with which it wants to reconnect.
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When a restartable Manager is initiated, it is either an initial instance or a restarted instance of a command ID. The command ID identifies a unit of work represented by the Manager, Server, and user process. See #Command Identifier, above, for more information on the command ID.
The RESTART configuration option specifies whether or not the Manager instance is requesting a restart of a previous command ID. Possible RESTART values are yes, no, and auto.
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The auto value permits automatic restart by eliminating the need to modify the RESTART value for the initial instance and restarted instance.
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The auto value cannot be used with a COMMAND_ID configuration option value of *, which specifies that the UCMD Manager will generate a unique command ID for each run. |
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