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Re: [Linux-cluster] Maximum number of nodes



On Fri, 2010-05-07 at 20:00 -0700, Celso K. Webber wrote:
> Hi Steve,
> 
> I believe the 16 node is a limit of qdiskd only, isn't it? CMAN node limit can be much higher, I believe. I don't know about GFS/GFS2 node limits, on the other hand.
> 
> >From the Cluster FAQ at http://sources.redhat.com/cluster/wiki/FAQ/CMAN:
> 
> "Is quorum disk/partition reserved for two-node clusters, and if not, how many nodes can it support?Currently a quorum disk/partition may be used in clusters of up to 16 nodes."
> 
> Regards,
> 
> Celso.
> 
> 

Celso,

BOth Chrissie and I have tested the cluster3/gfs2/corosync combo with 48
physical nodes with success.  However, at this point in time, we don't
have a constant 48 nodes to test upstream development trees.  16 nodes
is what we support at the moment because this is what most of the
developers have available to test with regularly.  We are working to
expand this in the future.

Regards
-steve

> ----- Original Message ----
> From: Steven Whitehouse <swhiteho redhat com>
> To: linux clustering <linux-cluster redhat com>
> Sent: Tue, May 4, 2010 12:55:38 PM
> Subject: Re: [Linux-cluster] Maximum number of nodes
> 
> Hi,
> 
> On Fri, 2010-04-30 at 14:37 -0500, Dusty wrote:
> > Hello,
> > 
> > Regarding the component versions of "Redhat Cluster Suite" as released
> > on the 5.4 and 5.5 ISOs...:
> > 
> > What is the maximum number of nodes that will work within a single
> > cluster? 
> > 
> The limit is 16 nodes.
> 
> > From where do the limitations come? GFS2? Qdisk? What if not using
> > qdisk? What if not using GFS2?
> > 
> > Thank you!
> The limit is down to what we can reasonably test, and thus what is
> supported. The theoretical limit is much higher and it may be possible
> to raise the supported node limits in future,
> 
> Steve.
> 
> 
>       
> 
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