On Mar 15, 2013, at 6:09 PM, Marion Hakanson <hakan...@ohsu.edu> wrote:
> Greetings, > > Has anyone out there built a 1-petabyte pool? Yes, I've done quite a few. > I've been asked to look > into this, and was told "low performance" is fine, workload is likely > to be write-once, read-occasionally, archive storage of gene sequencing > data. Probably a single 10Gbit NIC for connectivity is sufficient. > > We've had decent success with the 45-slot, 4U SuperMicro SAS disk chassis, > using 4TB "nearline SAS" drives, giving over 100TB usable space (raidz3). > Back-of-the-envelope might suggest stacking up eight to ten of those, > depending if you want a "raw marketing petabyte", or a proper "power-of-two > usable petabyte". Yes. NB, for the PHB, using N^2 is found 2B less effective than N^10. > I get a little nervous at the thought of hooking all that up to a single > server, and am a little vague on how much RAM would be advisable, other > than "as much as will fit" (:-). Then again, I've been waiting for > something like pNFS/NFSv4.1 to be usable for gluing together multiple > NFS servers into a single global namespace, without any sign of that > happening anytime soon. NFS v4 or DFS (or even clever sysadmin + automount) offers single namespace without needing the complexity of NFSv4.1, lustre, glusterfs, etc. > > So, has anyone done this? Or come close to it? Thoughts, even if you > haven't done it yourself? Don't forget about backups :-) -- richard -- richard.ell...@richardelling.com +1-760-896-4422
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