Configuring the Replication Server
If you want to make your system a high availability solution, you need the enqueue replication server as well as the standalone enqueue server.
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You have installed the (A)SCS instance as described in Installing the Standalone Enqueue Server.
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You have configured the replication with the parameter enque/server/replication = true.
More information: Profile Parameters for the Standalone Enqueue Server
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For the enqueue clients in the default profile you must have set the parameter enque/deque_wait_answer = TRUE.
More information: Profile Parameters for the Enqueue Clients
Note that you have to start the (A)SCS to activate the changes.
You can configure the following optional additional functions:
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Control mechanism for the replication server
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Persistence of the replication table in the file system
Setting Up the Control Mechanism for the Replication Server
Configure the control mechanism for the replication server. Here you have the following options:
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Self-control with HA Polling
Here the replication server uses the HA software to periodically request information about the physical host on which the (A)SCS instance is running. Depending on this information the ERS instance is activated or deactivated. To do this you need a tool (a script or a library from your HA hardware partner.)
ExampleIf you use an enqtest.sh script in directory DIR_EXECUTABLE you must insert the following lines in the instance profile.
#--------------------------------------------------------------------
# HA polling
#--------------------------------------------------------------------
enque/enrep/hafunc_implementation = script
enque/enrep/poll_interval = 10000
enque/enrep/hafunc_init =
enque/enrep/hafunc_check = $(DIR_EXECUTABLE)/enqtest.sh
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HA Software Control
With this solution the HA software will stop the ERS instance, if necessary. Ask your HA partner if this procedure is supported.