1clurmtabd(8) Red Hat Cluster Suite clurmtabd(8)
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6 clurmtabd - Cluster NFS Remote Mount Table Daemon
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9 Instances of clurmtabd keep entries relevant to a given mount point in
10 sync cluster-wide. It does this by polling /var/lib/nfs/rmtab periodi‐
11 cally.
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14 A single instance of clurmtabd is spawned by the service manager
15 (clusvcmgrd(8)) for each mount point in a given user service. Each
16 instance polls /var/lib/nfs/rmtab every few seconds, looking for
17 changes. When changes are detected, they are merged in with the cur‐
18 rent in-memory view. The entries are filtered according to the mount
19 point being monitored and are subsequently written out synchronously to
20 that mount point.
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22 When a user service is relocated (or after a fail-over), clurmtabd
23 reads the entries on a given mount point and synchronizes them with the
24 new member's /var/lib/nfs/rmtab. This is done prior to running the
25 exportfs(8) command so that clients of the given service do not receive
26 "Stale NFS file handle" errors.
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29 Clurmtabd is not a part of NFS and can not ensure that "Stale NFS file
30 handle" errors are never received. It is a best-effort attempt. To
31 fully prevent "Stale NFS file handle" errors, it is necessary to modify
32 the Linux kernel as well as nfs-utils.
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36 /var/lib/nfs/rmtab
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40 clurgmgrd(8), rpc.mountd(8), exportfs(8)
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44 Jan 2005 clurmtabd(8)