NetApp has shipped its pNFS server
As described in Red Hat's documentation, the RHEL 6.2 beta release includes a tech preview of RedHat's upcoming pNFS client for Linux. You can also go the Fedora route.
Two questions that we often get about our pNFS server are:
- Is there is a single pNFS metadata server? Answer: no, every node in a Data ONTAP 8 Cluster Mode storage cluster is capable of being a metadata server. The NFSv4.1 client simply NFS mounts a volume via any node of the storage cluster, and that node acts as a metadata server.
- What happens when a node hosting a metadata server encounters a failure? The Data ONTAP 8 Cluster Mode system is designed to be fault tolerant if there are two or more nodes in the cluster. Another node will be assigned the network interfaces (essentially, IP addresses) of the failed node, and the NFSv4.1 client will re-connect to the new node, discovering that there has been a metadata server failure, and if necessary, obtain new layouts to any open files that were being accessed over pNFS.