NFS issues

This topic describes some of the possible problems that can be encountered when GPFS interacts with NFS.

If you encounter server-side issues with NFS:
  1. Identify which NFS server or CES node is being used.
  2. Run and review output of mmhealth.
  3. Check whether all required file systems are mounted on the node that is being used, including the CES shared root.
  4. Review /var/log/ganesha.log. Messages tagged as CRIT, MAJ, or EVENT are about the state of the NFS server.
  5. Use ganesha_stats utility to monitor the NFS performance.

    This utility can capture statistics for the NFS server. For example, for all NFS v3 and NFS v4 operations, export, authentication related etc. This utility is not cluster aware and provides information only on the NFS server that is running on the NFS node.

When GPFS interacts with NFS, you can encounter the following problems: