Partitioned cluster question (reboot during lost quorum)

Say you have a 3 node cluster, node1, node2 node3

Each node has 1 vote. You need 2 votes to maintain quorum.

You unplug the ethernet from node3. node1 and node2 still have quorum
and happily chug along. Node3 realises it has lost quorum and freezes.

What happens if at this point, you reboot node3 ?

Node3 would not see 1 or 2 and thing it was the first node rebooting
after say a power failure. Right ?
Wouldn't NODE3 then form its instance of the cluster with its own vote
and a quorum of 1 ?

Or is there anything which would prevent node3 from rebooting ?


Once node3 has rebooted, thinking it was alone in the cluster, when
happens when you plug the ethernet back in and all of a sudden, node3
sees nodes 1 and 2 ? Will nodes 1 and 2 succeed in convinding node3 to
commit suicide ? Will node3 convince nodes1 and 2 to commit suicide
(since it is a more recent incarnation of the cluster) ?

Or will what is essentially a partitioned cluster continue to exist as 2
separate cluster instances ?


If node3 is i fact allowed to reboot all alone in its own little world,
it seems to me that shops should have, as part of their operator
documentstions, strict guidelines not to reboot machines that are
frozen. (sort of counter intuitive in a windows environment) since you'd
want to first fix/investigate the problem of lost quorum.
.

Relevant Pages

  • Re: Partitioned cluster question (reboot during lost quorum)
    ... You need 2 votes to maintain quorum. ... Node3 realises it has lost quorum and freezes. ... No, it will reboot, but hang when waiting to form or join a cluster. ... Quorum is half + 1 of VOTES or EXPECTED_VOTES, ...
    (comp.os.vms)
  • Re: Partitioned cluster question (reboot during lost quorum)
    ... Each node has 1 vote. ... You need 2 votes to maintain quorum. ... Node3 realises it has lost quorum and freezes. ... Node3 would not see 1 or 2 and thing it was the first node rebooting ...
    (comp.os.vms)
  • Re: Partitioned cluster question (reboot during lost quorum)
    ... You need 2 votes to maintain quorum. ... Node3 realises it has lost quorum and freezes. ... and Node3 could fully rejoin the cluster. ...
    (comp.os.vms)
  • Re: Partitioned cluster question (reboot during lost quorum)
    ... You need 2 votes to maintain quorum. ... Node3 realises it has lost quorum and freezes. ... Wouldn't NODE3 then form its instance of the cluster with its own vote ... EXPECTED_VOTES can prevent the reboot from completing. ...
    (comp.os.vms)
  • Re: "The cluster domain does not exist" ???
    ... Microsoft Cluster Server ... >I have created a two node cluster and am trying to add a third node to it. ... >For the sake of this discussion, lets call the two nodes Node1 and Node2. ... > There are no errors displayed for Node1 or Node3, ...
    (microsoft.public.windows.server.clustering)