Pavlos Parissis wrote:
On 18 October 2010 10:52, Florian Haas <florian.h...@linbit.com
<mailto:florian.h...@linbit.com>> wrote:
----- Original Message -----
> From: "Andreas Vogelsang" <a.vogels...@uni-muenster.de
<mailto:a.vogels...@uni-muenster.de>>
> To: pacemaker@oss.clusterlabs.org
<mailto:pacemaker@oss.clusterlabs.org>
> Sent: Monday, October 18, 2010 9:46:12 AM
> Subject: [Pacemaker] Question: How many nodes can join a cluster?
> Hello,
>
>
>
> I’m creating a presentation about a virtual Linux-HA Cluster. I just
> asked me how many nodes pacemaker can handle. Mr. Schwartzkopff
wrote
> in his Book that Linux-HA version 2 can handle up to 16 Nodes.
Is this
> also true for pacemaker?
I have been asked the same question and I said to them, let's say it
is 126, what is the use of having 126 nodes in the cluster?
Can someone imagine himself going through the logs to find why the
resource-XXX failed while there are 200 resources?!!
The only use of having 126 nodes is if you want to have HPC, but HPC
is total different story than high available clusters.
Even in N+N setup I would go with more than 4 or 6 nodes.
My 2 cents,
Pavlos
Actually, the syslog_facility in corosync.conf allows you to specify
either a log file for each node in the cluster (locally), or setting up
a remote syslog server. Either way, identifying the node by hostname or
some other identifier should point out what is going on where. Granted,
it's a large amount of data to process, therefore (such is the case with
any large deployment) SNMP is a much better alternative for tracking
issues, or (if you have _126_ times the same resource) adding some
notification options to the RA might be a choice, such as SNMP trap, or
even email.
BTW, I'm also interested in this, I remember reading something about 64
nodes, but I'd appreciate an official response.
Regards,
Dan
------------------------------------------------------------------------
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--
Dan FRINCU
Systems Engineer
CCNA, RHCE
Streamwide Romania
_______________________________________________
Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
