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

[Schaefer Christian]

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 at messe-muenchen.de 
WWW: www.messe-muenchen.de 

 

> -----Ursprüngliche Nachricht-----
> Von: linux-cluster-bounces at redhat.com 
> [mailto:linux-cluster-bounces at redhat.com] Im Auftrag von Hal
> Gesendet: Mittwoch, 11. Juli 2007 12:34
> An: linux-cluster at 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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