Managing Serviceguard NFS for Linux, March 2009

Figure 1-1 Simple Failover to an Idle NFS Server
Node_A is the primary node for NFS server package Pkg_1. When Node_A fails, Node_B adopts
Pkg_1. This means that Node_B locally mounts the file systems associated with Pkg_1 and
exports them. Both Node_A and Node_B must have access to the disks that hold the file systems
for Pkg_1.
Failover between Active Nodes
Figure 1-2 shows a failover from one active NFS server node to another active NFS server node.
In Figure 1-2, Node_A is the primary node for Pkg_1, and Node_B is the primary node for Pkg_2.
When Node_A fails, Node_B adopts Pkg_1 and becomes the server for both Pkg_1 and Pkg_2.
10 Serviceguard NFS for LINUX Introduction