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Cluster Customization 127
Figure 14. NFS Cross Mounts
When Node A fails, Node B uses the cl_nfskill utility to close open files in
Node A:/afs, unmounts it, mounts it locally, and re-exports it to waiting clients.
After takeover, Node B has:
/bfs locally mounted
/bfs nfs-exported
/afs locally mounted
/afs nfs-exported
Ensure that the shared volume groups have the same major number on the
server nodes. This allows the clients to re-establish the NFS-mount
transparently after the takeover.
Caveats about Node Names and NFS
In the configuration described above, the node name is used as the NFS
hostname for the mount. This can fail if the node name is not a legitimate
TCP/IP adapter label.
To avoid this problem do one of the following: