VERITAS Volume Manager 3.1 Administrator's Guide

Cluster Functionality
Cluster Terminology
Chapter 7 331
Cluster Terminology
The following is a list of cluster-related terms and definitions:
clean node
shutdown The ability of a node to leave the cluster gracefully
when all access to shared volumes has ceased.
cluster A set of hosts that share a set of disks.
cluster
manager An externally-provided daemon that runs on each node
in a cluster. The cluster managers on each node
communicate with each other and inform VxVM of
changes in cluster membership.
cluster-sharea
ble disk group A disk group in which the disks are shared by multiple
hosts (also referred to as a shared disk group).
distributed
lock manager A lock manager that runs on different systems and
ensures consistent access to distributed resources.
master node A node that is designated by the software as the
“master” node. Any node is capable of being the master
node. The master node coordinates certain Volume
Manager operations.
node One of the hosts in a cluster.
node abort A situation where a node leaves a cluster (on an
emergency basis) without attempting to stop ongoing
operations.
node join The process through which a node joins a cluster and
gains access to shared disks.
private disk
group A disk group in which the disks are accessed by only
one specific host.
slave node A node that is not designated as a master node.
shared disk
group A disk group in which the disks are shared by multiple