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тАО05-05-2011 02:35 AM
тАО05-05-2011 02:35 AM
Turning off Quorum Server
We need to physically relocate our ServiceGuard Quorum Server in the near future.
Will shutting it down affecting any of our running ServiceGuard clusters?
We had an issue recently where a Cluster tried to reform when the Quorum Service was off the air, the Cluster then shut itself down when it couldn't make contact. Is there any way to prevent this happening for the duration of the Server Move?
Any advice or assistance would be much appreciated,
Many Thanks
James
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тАО05-05-2011 02:45 AM
тАО05-05-2011 02:45 AM
Re: Turning off Quorum Server
how long will take the outage of the quorum server? If it's going to take a few days, then you can make a new temporary QS within a few minutes (it can be installed on Linux also).
Since some version of SG ( 18+ or 19+ ), the reconfiguration of cluster quorum type can be done online. Or you can change the QS for lvm cluster lock disk for the time of movement.
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тАО05-05-2011 03:51 AM
тАО05-05-2011 03:51 AM
Re: Turning off Quorum Server
We're not overly concerned with ServiceGuard not failing the Application over in the event of an issue, more so that the Quorum Service being unavailable might cause an issue itself.
I've been told that the SG Version we're running doesn't allow us to change the Quorum Service without taking down the Cluster which is unfortunate as we do have a second Quorum Server.
Thanks
James
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тАО05-05-2011 05:02 AM
тАО05-05-2011 05:02 AM
Re: Turning off Quorum Server
We had an issue in our environment once:
After the weekend outage, the cluster, althought got started after the outage, went down on Monday morning. The cause was simple:
one node of the 2node cluster was vPar and was being dynamically allocated / deallocated processors every morning . During this 'vparmodify' command, the node just 'freezed' for a few seconds and cmcld daemon was not running which caused a cluster reformation, and since the quorum server was down after the outage, the cluster couldn't reform :)
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тАО05-05-2011 06:08 AM
тАО05-05-2011 06:08 AM
Re: Turning off Quorum Server
Any ideas how to stop it trying to reform or are we stuck?
Thanks for the responses so far!
James
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тАО05-05-2011 09:53 AM
тАО05-05-2011 09:53 AM
Re: Turning off Quorum Server
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тАО05-05-2011 10:17 PM
тАО05-05-2011 10:17 PM
Re: Turning off Quorum Server
But that's just a bit too much work to configure another node to a running cluster :) .
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тАО05-06-2011 12:14 AM
тАО05-06-2011 12:14 AM
Re: Turning off Quorum Server
We plan to shut it down and leave both Servers in the Cluster up and running.
And, naturally, we're hoping for a solution that wouldn't require an outage on the cluster to implement :)
Thanks again,
James
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тАО05-06-2011 12:38 AM
тАО05-06-2011 12:38 AM
Re: Turning off Quorum Server
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тАО05-06-2011 06:05 AM
тАО05-06-2011 06:05 AM