No Sun Cluster node may be an NFS client of a Sun Cluster HA for NFS-exported file system being mastered on a node in the same cluster. Such cross-mounting of Sun Cluster HA for NFS is prohibited. Use the cluster file system to share files among cluster nodes.
Applications running locally on the cluster must not lock files on a file system exported via NFS. Otherwise, local blocking (for example, flock(3UCB) or fcntl(2)) might interfere with the ability to restart the lock manager (lockd). During restart, a blocked local process may be granted a lock which may be intended to be reclaimed by a remote client. This would cause unpredictable behavior.
Sun Cluster HA for NFS requires that all NFS client mounts be “hard” mounts.
For Sun Cluster HA for NFS, do not use hostname aliases for network resources. NFS clients mounting cluster file systems using hostname aliases might experience statd lock recovery problems.
Sun Cluster 3.1 software does not support Secure NFS or the use of Kerberos with NFS, in particular, the secure and kerberos options to the share_nfs(1M) subsystem. However, Sun Cluster 3.1 software does support the use of secure ports for NFS by adding the entry set nfssrv:nfs_portmon=1 to the /etc/system file on cluster nodes.