CLUSTER_MEMBERSHIP - OMS configuration option
Description
The CLUSTER_MEMBERSHIP option specifies one or more cluster nodes to use in a High Availability environment.
Usage
Method | Syntax | IBM i | HP NonStop | UNIX | Windows | z/OS |
|---|---|---|---|---|---|---|
Configuration File Keyword | cluster_membership nodes |
Value
nodes is a comma-separated list of cluster members in the following format:
[nodepriority]node_id:public_address:port
or
node_id:public_address:port
For example: 1:127.0.0.1:9001,[10]2:127.0.0.1:9002,3:127.0.0.1:9003
[nodepriority] is an optional parameter that specifies priority of the node. Higher priority means higher preference is given to the node during the leader election process, given that the node has an up-to-date replication log.
A priority of [0] designates a Witness Node. A Witness Node participates in a leader election process and receives replication log entries, but it never gets elected as a leader under normal circumstances. The only exception is when it is the only node containing the freshest replication log. In this case a Witness Node takes leadership, synchronizes the replication log with other nodes, and steps down immediately to initiate a new leader election.