HP LeftHand SAN Solutions Support Document - User Manual - User Manual VSA 7.0 SP1 for VMware

Chapter: Designing A Virtual SAN 9
Designing Your Virtual SAN
The design of your virtual SAN affects both its performance and its reliability
for production use. Use the concepts and practices in this manual when
installing and managing your virtual SAN to ensure optimal performance
and reliability.
Quorum A majority of managers required to be running
and communicating with each other in order for
the SAN/iQ software to function.
Replication Synchronous replication of volumes across storage
nodes in a cluster.
Virtual Manager A manager that is added to a management group
but is not started on a storage node until it is
needed to regain quorum. The virtual manager
must be started manually.
A virtual manager is added to a management
group automatically when you create a
management group with an even number of
managers, for example, if using two storage nodes
to create the management group.
Volume A logical entity that is made up of storage on one
or more storage nodes. It can be used as raw data
storage or it can be formatted with a file system
and used by a host or file server.
VSA
The Virtual SAN Appliance for VMware
®
ESX
Server, abbreviated as VSA.
Table 1 Glossary for the VSA
Term Definition