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27 Dell HPC NFS Storage Solution – High Availability (NSS7.0-HA) Configuration
As with the IOzone random access patterns, the following procedure was followed to minimize cache
effects during the metadata testing:
1. Unmount NFS share on clients.
2. Stop the cluster service on the server. This unmounts the XFS file system on the server.
3. Start the cluster service on the server.
4. Mount NFS Share on clients.
 Metadata file and directory creation test:
# mpirun -np 32 --nolocal --hostfile ./hosts /nfs/share/mdtest -d
/nfs/share/filedir -i 6 -b 320 -z 1 -L -I 3000 -y -u -t -C
 Metadata file and directory stat test:
# mpirun -np 32 --nolocal --hostfile ./hosts /nfs/share/mdtest -d
/nfs/share/filedir -i 6 -b 320 -z 1 -L -I 3000 -y -u -t -R -T
 Metadata file and directory removal test:
# mpirun -np 32 --nolocal --hostfile ./hosts /nfs/share/mdtest -d
/nfs/share/filedir -i 6 -b 320 -z 1 -L -I 3000 -y -u -t -r