[Linux-cluster] GFS2 - disable plock limit on a live cluster

David Teigland teigland at redhat.com
Wed Sep 12 18:42:07 UTC 2012

On Mon, Sep 10, 2012 at 11:47:32AM -0400, david robertson wrote:
> Hello, I have a cluster of 11 hosts all sharing the same volume.
> Currently, the default plock limit of 100 is enabled.  The catch is,
> this is a live cluster, and it can not be taken offline.
> My question is, can I modify the cluster.conf file with the usual
> lines (dlm plock_ownership=1, plock_rate_limit=0, etc) and just do
> "ccs_tool update" and be done with it, or does each node have to be
> rebooted?

plock_rate_limit=0: You can push out the new config and restart cman on
each node separately.

plock_ownership=1: First make sure you need it; it will usually make
things worse.  Second, you need to stop the entire cluster, push out the
new setting, then start the cluster again.

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