1CLVMD(8) System Manager's Manual CLVMD(8)
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6 clvmd - cluster LVM daemon
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9 clvmd [-d] [-h] [-R] [-t <timeout>] [-T <start timeout>] [-V]
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12 clvmd is the daemon that distributes LVM metadata updates around a
13 cluster. It must be running on all nodes in the cluster and will give
14 an error if a node in the cluster does not have this daemon running.
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17 -d Runs in the foreground and prints debugging information (if com‐
18 piled in) to stderr. By default, clvmd will fork into the back‐
19 ground when invoked.
20 -t <timeout>
22 Specifies the timeout for commands to run around the cluster.
23 This should not be so small that commands with many disk updates
24 to do will fail, so you may need to increase this on systems
25 with very large disk farms. The default is 30 seconds.
26 -T <start timeout>
28 Specifies the timeout for clvmd daemon startup. If the daemon
29 does not report that it has started up within this time then the
30 parent command will exit with status of 5. This does NOT mean
31 that clvmd has not started! What it means is that the startup of
32 clvmd has been delayed for some reason; the most likely cause of
33 this is an inquorate cluster though it could be due to locking
34 latencies on a cluster with large numbers of logical volumes. If
35 you get the return code of 5 it is usually not necessary to
36 restart clvmd - it will start as soon as that blockage has
37 cleared. This flag is to allow startup scripts to exit in a
38 timely fashion even if the cluster is stalled for some reason.
39 <br> The default is 0 (no timeout) and the value is in seconds.
40 Don't set this too small or you will experience spurious errors.
41 10 or 20 seconds might be sensible. <br> This timeout will be
42 ignored if you start clvmd with the -d switch.
43 -R Tells all the running clvmd in the cluster to reload their
45 device cache and re-read the lvm configuration file. This com‐
46 mand should be run whenever the devices on a cluster system are
47 changed.
48 -V Display the version of the cluster LVM daemon.
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52 lvm(8)
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