Serviceguard NFS Toolkit A.11.11.06, A.11.23.05 and A.11.31.08 Administrator's Guide (October 2011)

Figure 4 SG NFS Servers over CFS — High Availability, File Locking
Supported Configurations
Serviceguard NFS supports the following configurations:
• Simple failover from an active NFS server node to an idle NFS server node.
• Failover from one active NFS server node to another active NFS server node, where the
adoptive node supports more than one NFS package after the failover.
• A host configured as an adoptive node for more than one NFS package. The host may also
be prevented from adopting more than one failed package at a time.
• Cascading failover, where a package may have up to three adoptive nodes.
• Server-to-server cross mounting, where one server may mount another server's file systems,
and the mounts are not interrupted when one server fails.
These configurations are illustrated in the following sections.
Simple Failover to an Idle NFS Server
Figure 5 shows a simple failover from an active NFS server node to an idle NFS server node.
Supported Configurations 13