Clusters versus server farms

Server and Cluster Administration Guide for Hitachi NAS Platform

Part Number

The following table distinguishes the properties of a cluster and a server farm:

Property Cluster Server farm
Can belong to a server farm Yes No
EVS migration under server failure Automatic Manual
NVRAM mirroring between servers Yes No
Maximum number of storage servers Depends on several factors. See Maximum number of nodes supported for more information. No explicit restriction on the number of servers; however, a NAS Manager can manage only eight quorum devices and server farm planning should be adjusted accordingly.
Shared NAS Manager For central management; cluster quorum For central management; EVS migration
Storage Pools Yes No
Common Storage Access Yes Yes