Quiescing high availability nodes
Quiesce is a process for cleanly taking a Pega Platform node out of service for maintenance or other activities.
When a node is being quiesced, active users are migrated to an active node when the quiescing node is no longer available.
You can use the Pega API or high availability landing pages to quiesce a node. For more information about these management tools, see Cluster management.
Pega Platform offers two types of quiesce: immediate drain (the default),
and slow drain. To switch the quiesce method to slow drain, change the value of the
session/ha/quiesce/strategy setting in the
prconfig.xml file to "slowDrain" and restart the node.
Quiesce a node by using one of the following procedures, depending on how your cluster is configured:
- Quiescing nodes using immediate drain
Immediate drain for quiesce on a highly available system is the default method for quiescing a node. The following behavior occurs on a Pega Platform server when the quiesce process is enabled.
- Quiescing nodes using slow drain
Slow drain for quiesce on a highly available system is not the default. The following actions occur on a Pega Platform server when the quiesce process is enabled.