NAS

Omar Kilani ok at mailcall.com.au
Fri Jun 28 15:33:37 EDT 2002


Hi Martin,

There are lots of patches to deal with huge filesystems... The most recent
one I've read about was mentioned on LKML and is related to the Gelato
project at UNSW:

http://www.gelato.unsw.edu.au/~peterc/lfs.html

Use XFS and NFSv3 and you should be OK with that patch.
Using LVM may also be a good idea.

Reading LKML may also help... :-)

The Link on Large Systems foundary at SF may also be interesting:

http://large.foundries.sourceforge.net/

Hope that helps a little...

Regards,
Omar Kilani

On Fri, 28 Jun 2002, Martin Siegert wrote:

> On a related issue:
> 
> we are planning to install a relatively large NAS unit (in the 100TB range).
> The question is: is there a limit (and if yes, how large is it?) for the
> largest file system Linux can mount?
> E.g., can I NFS mount a 8TB file system under Linux? (kernel 2.4.18).
> 
> Thanks for any information you may have on that problem.
> 
> Cheers,
> Martin
> 
> ========================================================================
> Martin Siegert
> Academic Computing Services                        phone: (604) 291-4691
> Simon Fraser University                            fax:   (604) 291-4242
> Burnaby, British Columbia                          email: siegert at sfu.ca
> Canada  V5A 1S6
> ========================================================================
> 
> On Fri, Jun 28, 2002 at 01:29:12PM -0400, John Burton wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > Mike,
> > 
> > I have two relatively large NAS units (.5TB and 1.5TB). Both use ATA/100 
> > drives configured in a RAID 5 array. The large one is a standard product 
> > (OpenNAS) from RAIDZONE / Consensys and is used for the datastore for the 
> > NASA SABER project (saber.larc.nasa.gov). The smaller one is a homebuilt NAS 
> > serving as a backup server for our company.  Basically I bought 2 3Ware 
> > hotswap cages (3 ATA/100 drives each and a 3Ware Escalade RAID 5 card (8 
> > ATA/100 channels). The 3Ware card is supported under Linux and causes the 
> > RAID array to look like a SCSI drive. You can also configure the board to 
> > access the drives individually and use software RAID or whatever. We're happy 
> > with both setups, but I'll probably go with the 3Ware setup for our next 
> > project. I like the 3Ware native linux drivers and the RAID manager support - 
> > I don't like "black boxes" and the RAIDZONE unit is more of a black box to me 
> > then the homebuilt... Hope this helps!
> > 
> > John
> > 
> > On Friday 28 June 2002 10:43 am, Mike Davis wrote:
> > > How many beowulfers have implemented or are working towards implementing
> > > gigabit NAS. I have two systems with .5TB and 1TB respectively and they
> > > seem to work ok. What are other people's experiences.
> > >
> > > Mike Davis
> > >
> > > _______________________________________________
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> > 
> > - -- 
> > John Burton, Ph.D.
> > Principal Associate              GATS, Inc.  
> > j.c.burton at gats-inc.com          11864 Canon Blvd - Suite 101
> > jcb at visi.net (personal)          Newport News, VA 23606
> > (757) 873-5920 (voice)           (757) 873-5924 (fax)
> >                     
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