The group membership service (GMS) is the means by which OPS
instances communicate with the MC/LockManager cluster sofware. GMS
runs as an OPS daemon process that communicates with the cluster
manager.
The cluster manager starts up, monitors, and shuts down the
GMS daemon, known as ogms. When an OPS instance
starts, the instance registers itself with GMS; thereafter, if an
OPS instance fails, GMS notifies other cluster nodes to perform
recovery. If GMS dies unexpectedly, MC/LockManager will fail the
node with a TOC.
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