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Re: [Linux-cluster] gfs2 v. zfs?



On Monday 24 January 2011 22:58 Jeff Sturm wrote
> > -----Original Message-----
> > From: linux-cluster-bounces redhat com
> 
> [mailto:linux-cluster-bounces redhat com]
> 
> > On Behalf Of Wendy Cheng
> > Subject: Re: [Linux-cluster] gfs2 v. zfs?
> > 
> > I would love to get an education here. From usage model point of view,
> > what is the
> > difference between a "parallel file system" and a "cluster file
> > system" ? i.e., when to
> > use a parallel file system and when to use a cluster file system ?
> 
> Getting off-topic but I'd also like to hear who uses a parallel
> distributed FS, and what problem space they work well in.


HPC where you need  very high bandwidth/throughput to disk (usually scratch 
filesystem).


> GFS works fine, but we have trouble scaling it up due solely to the
> limits of central storage.  I'm sure there are esoteric storage designs
> to get around this, but at some point I also suspect there's an easier
> way...


>From a HW point of view, DDN has very good storage arrays ... but you pay for 
it ;) They promise 6 GB/s and you get those 6 GB/s.

You can also use more storage arrays and use some volume manager to group them 
together. This is a bit tricky because it won't guarantee a load balance on 
the different storage arrays.

HTH

   Rafa

-- 
"We cannot treat computers as Humans. Computers need love."

Happily using KDE 4.5.4 :)


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