01.04.2011 18:36, Ron Kerry:
Folks -
Consider a running cluster with all resources managed. We want to stop
and quickly restart a particular resource without impacting other
resources. The software stack running on the system can deal with this
sort of temporary outage. We perform the following actions:
* unmanage the resource
* stop the resource
* start the resource
* manage the resource
The above procedure is sometimes successful. However, we will also
sometimes get a resource monitor failure after stopping the resource.
It is clear that the monitor operation was not stopped (at least not
immediately) by unmanaging the resource.
Unmanaged resource cannot be started and stopped, but can still be
monitored.
Will the monitor operation get stopped when a resource is unmanaged?
If so, how long will it take for this to occur?
What determines this length of time?
Is there a better way to do a quick restart of a resource without
impacting other resources?
(In our case the resource is a member of a resource group)
Resource group is a shortcut describing ordered set of resources. When
one of them is restarted, all subsequent resources must also be
restarted. In your design, it is not necessary. I would not recommend
using groups in this case.
--
Pavel Levshin
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