Hi,
On 10/14/2016 03:17 PM, Ulrich Windl wrote:
Ken Gaillot <[email protected]> schrieb am 13.10.2016 um 16:49 in Nachricht
<[email protected]>:
On 10/13/2016 03:36 AM, Ulrich Windl wrote:
That's what I'm talking about: If 1 of 3 nodes is rebooting (or the cluster
is split-brain 1:2), the single node CANNOT continue due to lack of quorum,
while the remaining two nodes can. Is it still necessary to wait for
completion of stonith?
If the 2 nodes have working communication with the 1 node, then the 1
node will leave the cluster in an orderly way, and fencing will not be
involved. In that case, yes, quorum is used to prevent the 1 node from
starting services until it rejoins the cluster.
The $%&/@ problem of a root process having a file open on OCFS prevented the
clean unmount of the filesystem. I think newer versions of the RA now even kill
root processes.
Can anybody explain why root processes were excluded before?
@Ken Gaillot
Thanks your explanation on the fencing things.
@Ulrich Windl
I did't try the RAs you mentioned. But I am wondering if the new version of the
RA can kill
the root process that is doing IO in D state?
Eric
However, if the 2 nodes lose communication with the 1 node, they cannot
be sure it is functioning well enough to respect quorum. In this case,
they have to fence it. DLM has to wait for the fencing to succeed to be
sure the 1 node is not messing with shared resources.
_______________________________________________
Users mailing list: [email protected]
http://clusterlabs.org/mailman/listinfo/users
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org
_______________________________________________
Users mailing list: [email protected]
http://clusterlabs.org/mailman/listinfo/users
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org
_______________________________________________
Users mailing list: [email protected]
http://clusterlabs.org/mailman/listinfo/users
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org
