NFS problems in failover – MC Service Guard. Applicable to other Linux HA clusters

Problem: Two Linux servers (RHEL4) running NFS Server in High-Availability (failover) mode. When failovering the resources, an NFS client can continue to work. When failing back, the NFS client times-out for 5+ minutes. Further problem information: While using RHEL3, that same (exact) configuration worked flawlessly. Solution: set NFS options to UDP instead of TCP. Explanation:…