Highly available NFS server

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The highly available NFS server functionality is included in the PowerHA® SystemMirror® product subsystem.

A highly available NFS server allows a backup processor to recover current NFS activity should the primary NFS server fail. The NFS server special functionality includes highly available modifications and locks on network file systems (NFS). You can do the following:

  • Use the reliable NFS server capability that preserves locks and dupcache (2-node clusters only if using NFS version 2 and version 3)
  • Specify a network for NFS cross-mounting
  • Define NFS exports and cross-mounts at the directory level
  • Specify export options for NFS-exported directories and file systems
  • Configure two nodes to use NFS.

PowerHA SystemMirror clusters can contain up to 16 nodes. Clusters that use NFS version 2 and version 3 can have a maximum of two nodes, and clusters that use NFS version 4 can have a maximum of 16 nodes.