[Beowulf] High Performance for Large Database

Michael Will mwill at penguincomputing.com
Mon Nov 15 11:47:57 EST 2004


On Monday 15 November 2004 05:26 am, Laurence Liew wrote:
> The current version of GFS have a 64 node limit.. something to do with 
> maximum number of connections thru a SAN switch.
Does this mean 64 nodes with direct SAN access or 64 client nodes?

64 IO nodes could support a larger cluster than just 128 nodes IMHO.

Michael 
> I believe the limit could be removed in RHEL v4.
> 
> BTW, GFS was built for enterprise and not specifically for HPC... the 
> use of SAN (all nodes need to be connected to a single SAN storage).. 
> may be a bottleneck...
> 
> I would still prefer the model of PVFS1/2 and Lustre where the data is 
> distributed amongst the compute nodes
> 
> I suspect GFS could prove useful however for enterprise clusters say 32 
> - 128 nodes where the number of IO nodes (GFS nodes with exported NFS) 
> can be small (less than 8 nodes)... it could work well
> 
> Cheers!
> Laurence
> 
> Chris Samuel wrote:
> > On Wed, 10 Nov 2004 12:08 pm, Laurence Liew wrote:
> > 
> > 
> >>You may wish to try GFS (open sourced by Red Hat after buying
> >>Sistina)... it may give better performance.
> > 
> > 
> > Anyone here using the GPL'd version of GFS on large clusters ?
> > 
> > Be really interested to hear how folks find that..
> > 
> > 
> > 
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