[Pacemaker] Question: How many nodes can join a cluster?

[Florian Haas]

----- Original Message -----
> From: "Andreas Vogelsang" <a.vogelsang at uni-muenster.de>
> To: pacemaker at 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?

AFAIR Pacemaker can theoretically handle up to 255, but the practical limits are determined by the messaging limits of the cluster communications layer and the size of the CIB. Heartbeat should mostly be fine up to 16 nodes, and I believe Corosync and Pacemaker are currently being regularly tested for up to 32 nodes. Maybe Steve and Andrew can chime in more details.

Cheers,
Florian