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Re: AW: [Linux-cluster] Redhat cluster and GFS node limit



Thanks for the quick answers! But the answers raised few more questions.
Yes I need LVS to balance ~100 nodes which access the same data on GFS.
In this case what modules do I need from the RedHat Cluster? 
Do I need locks (DLM)? I think I do, don't I?
1.CCS?
2.GFS?
3.GFS-kernel?

Anything else?

Regards 
Hal

--- Schaefer Christian <Christian Schaefer2 messe-muenchen de> wrote:

> Dear Hal,
> 
> this limitation means, that you can only run up to 16 rgmanagers in one
> cluster infrastructure. rgmanager thereby is only needed if you build HA
> services like a active/passive MySQL cluster services. If you like to build a
> 100 node webserver farm with external loadbalancing/failover - such as LVS
> and/or keepalived - no rgmanager is needed to be run on that cluster. 
> 
> In this case you can set up a 100 node cluster with shared gfs devices as you
> like. I too recommend you to have a look at
> http://open-sharedroot.org/documentation. The concept demonstarted on that
> page is do build a n node cluster from one filesystem single image which
> keeps administration simple.
> 
> Greetings,
> Christian
> 
> Best Regards, 
> 
> Christian Schäfer
> Abt. IT-Applications
> Messe München 
> 
> Tel.: +49 (0) 89 949 21985 
> E-Mail: christian schaefer2 messe-muenchen de 
> WWW: www.messe-muenchen.de 
> 
>  
> 
> > -----Ursprüngliche Nachricht-----
> > Von: linux-cluster-bounces redhat com 
> > [mailto:linux-cluster-bounces redhat com] Im Auftrag von Hal
> > Gesendet: Mittwoch, 11. Juli 2007 12:34
> > An: linux-cluster redhat com
> > Betreff: [Linux-cluster] Redhat cluster and GFS node limit
> > 
> > Hi all,
> > 
> > I have a project which requires a cluster of over 100 GFS 
> > nodes. GFS supports
> > them, but RH cluster supports only 16 nodes. For this case 
> > the documentation
> > says:
> > 
> > "Red Hat GFS is scalable up to 300 nodes, a Red Hat Cluster 
> > Manager limits the
> > total number of nodes in a cluster to 16. Therefore, in this 
> > scenario, Red Hat
> > GFS scalability is limited. If the 16-node limit is too small for your
> > deployment, you may want to consider using multiple Red Hat 
> > Cluster Manager
> > clusters."
> > 
> > So any docs or ideas on how to build "multiple Red Hat Cluster Manager
> > clusters"? 
> > Will this solution enable all 100+ nodes to access the same 
> > File system? 
> > 
> > 
> > Thank you!
> > Hal
> > 
> > 
> >  
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