Sun Microsystems iPlanet Integration Server 3.0, Руководство по системе управления

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Managing iIS Process Engines with Conductor Script
242 iPlanet Integration Server • Process System Guide • August 2001
Changing Engine States
You can change the state of an engine by changing the state of an engine unit or by
shutting down an engine component.
Changing Engine Unit States
You might want to change the state of an engine unit for a number of reasons. For
example, you might want to close all client sessions with a primary engine unit
(change its state from ONLINE to STANDBY) in order to perform administrative
functions on the database. Or you might want to place a primary engine unit in
STANDBY state so you can make its partner primary. When the partner goes from
STANDBY to ONLINE, it recovers state information from the database.
➤
To change the state of an engine unit
1.
Use the
FindEngine
command to make the engine of interest current.
2.
Use the
FindUnit
or
FindPrimary
command to make the component of
interest current.
3.
Use the
SetState
command to set the engine unit state.
If you want to place the primary unit on standby, and the backup unit online, you
can perform this operation in a single command using the
SetPrimary
command.
The Conductor Script commands used to change engine states are documented in
Appendix A, “Conductor Script Commands” and summarized in the following
table:
Command Arguments Function See…
FindEngine engine_name
Set specified engine as the “current”
engine. The engine (nor any of its
components) does not have to be
running. page 284
FindUnit unit_name
Set the specified engine unit for the
current engine as the current component.
The engine unit must be running. page 286
FindPrimary ——
Set the primary engine unit for the
current engine as the current component.
The primary unit must be ONLINE. page 285
SetState state
Set the state for the current engine unit to
ONLINE or STANDBY. page 302