[CentOS] NAS Storage server question

Thu Jun 11 15:32:49 UTC 2009
Coert Waagmeester <lgroups at waagmeester.co.za>

On Thu, 2009-06-11 at 17:14 +0200, Rainer Duffner wrote:
> Coert Waagmeester schrieb:
> > Hello all,
> >
> >
> > At our office a have a server running 3 Xen domains. Mail server, etc.
> >
> > I want to make this setup more redundant.
> >
> > There are a few howtos on the combination of Xen, DRBD, and heartbeat.
> > That is probably the best way.
> >
> > Another option I am looking at is a piece of shared storage,
> > a machine running CentOS with a large software RAID 5 array.
> >   
> 
> How large?
> Depending on the size, RAID6 is the better option (with >=1TB disks, the
> rebuild can take longer than the statistical average time another disk
> needs to fail).

I am starting with 4 1TB SATA disks.

With RAID 6 that will give me 2 TB right?
> 
> 
> > What is the best means of sharing the storage?
> > I would really like to use a combination of an iSCSI target server, and
> > GFS or OCFS.
> >
> >   
> 
> 
> If you don't already do GFS (and have been doing so for years), I'd say
> you better only do it in a configuration that is either supported by
> RedHat (e.g. with RHEL) or some competent 3rd-party that can help you
> over the pitfalls.
> Else you are on your own, with only the GFS mailinglist, yourself and
> your keyboard ;-)
> 
Will OCFS be easier?
> 
> 
> 
> 
> Rainer
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