Share your configuration, please.
On 03/31/2013 02:51 AM, Prathyush wrote:
Any Idea ?
On Sat, Mar 23, 2013 at 3:41 PM, Prathyush <prathyush.r@xxxxxxxxx
<mailto:prathyush.r@xxxxxxxxx>> wrote:
I have the below scenario,
I have made the first node down the service failover to second
node,then I switched off second node ,service again swiched to third
node,the quorum was not lost,it adjusted automatically
On Mar 22, 2013 9:11 PM, "Digimer" <lists@xxxxxxxxxx
<mailto:lists@xxxxxxxxxx>> wrote:
This is correct.
Quorum needs "50% + 1" of the votes. So in Prathyush's cluster
of 3 nodes/3 votes;
3 / 2 == 1.5 rounded up is 2.
So once the second node shut down, quorum was lost. With quorum
lost, the remaining node will stop all of it's clustered
services because it can no longer be sure what the other nodes
are doing. For example, the other two nodes might turn back on,
fail to connect to the one remaining node, decide they have
quorum and start clustered services. This would lead to a split
brain.
If you want a 3-node cluster to work with just one node,
consider adding a quorum disk, assuming you have a SAN. This
would add 2 votes to the cluster. So the new math would be;
5/2 == 2.5 rounded up to 3.
The quorum disk would give it's two votes to the remaining
single node for a total of 3 votes, thus giving it quorum and
allowing it to operate on it's own.
digimer
On 03/22/2013 03:16 AM, emmanuel segura wrote:
Hello
If i understand well, you 3 node(3 total votes) and you
poweroff 2, 3 -
2 = 1(quorum loss) remain less 50% of votes
can you show your config and your log, without it's so hard
help you
Thanks
2013/3/22 Prathyush <prathyush.r@xxxxxxxxx
<mailto:prathyush.r@xxxxxxxxx> <mailto:prathyush.r@xxxxxxxxx
<mailto:prathyush.r@xxxxxxxxx>>__>
HI,
I have 3 node cluster with 1 vote each ,and decided
to shut down
the 2 nodes for maintenance .
When a proper power off /init 0 given to two of the
nodes ,i never
loses the quorum
When i am making force power off (switching off the
power/pulling
the power cable) quorum was lost and services failed
in the third node.
why this is happening... any idea
--
/*Regards,
Prathyush*/
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/*Regards,
Prathyush*/
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