The group membership service (GMS)
is the means by which OPS instances communicate with the MC/LockManager cluster
software. 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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