There's a most important point. A better monitor/notification method of disks .
2013/1/30 Jan Drake <[email protected]> > A presentation at the first openstack design summit was given in which a > vendor did a couple of petabyte swift implementations. In that > presentation, they explained that in one implementation they used > enterprise drives and another desktop drives. > > Enterprise drive failures were higher due to lack of burn-in and cost was > higher. > Desktop drive failures were close to zero as they found a vendor to burn > them in upon purchase. > > The net net here is this: > > - Use commodity hardware > - Plan for failures > - Use chassis that make it quick/easy to replace drives > > Intel is working on a 12 drive array (inexpensive by their terms) that is > meant to be throw-awayŠ sealed chassisŠ automatically fails drives over > and links to other drive arrays. > > Cheapest is best for file/object storage. Block storage may be a > different matter depending on your requirements. > > > Jan > > On 1/29/13 8:42 AM, "Chuck Thier" <[email protected]> wrote: > > >Hi John, > > > >It would be difficult to recommend a specific drive, because things > >change so often. New drives are being introduced all the time. > >Manufacturers buy their competition and cancel their awesome products. > > So the short answer is that you really need to test the drives out in > >your environment and in your use case. I can pass on some wisdom from > >our experience. > > > >1. "Enterprise" drives are not worth it. We have not seen a > >significant difference between the failure rate of enterprise class > >drives and commodity drives. I have heard this as well from other > >large swift deployers, as well as other large storage providers. Even > >if enterprise drives had a significantly less failure rate, the added > >cost would not be worth it. > > > >2. Be wary of "Green" drives. The green features on these drives can > >work against you in a swift cluster (like auto parking heads and > >spinning down). If you are going with a green drive, make sure they > >are well tested, and/or at least have the capability to turn these > >features off. > > > >3. Go big. If you can, use 3T or larger drives. You get a more even > >distribution and better overall utilization with larger drives. > > > >4. Don't believe everything you read on the internet (including me > >:)) Test! Test! Test! > > > >-- > >Chuck > > > >On Mon, Jan 28, 2013 at 7:11 PM, John van Ommen <[email protected]> > >wrote: > >> Does anyone on the list have a disk they'd recommend for OpenStack > >>swift? > >> > >> I am looking at hardware from Dell and HP, and I've found that the > >> disks they offer are very expensive. For instance, HP's 2TB disk has > >> a MSRP of over $500, while you can get a Western Digital 2TB 'Red' > >> disk for $127. > >> > >> Is there any reason to opt for the drives offered by Dell or HP? (I > >> assume they're re-branded disks from Seagate and WD anyways.) > >> > >> Are there any disk SKUs that you'd recommend? > >> > >> _______________________________________________ > >> Mailing list: https://launchpad.net/~openstack > >> Post to : [email protected] > >> Unsubscribe : https://launchpad.net/~openstack > >> More help : https://help.launchpad.net/ListHelp > > > >_______________________________________________ > >Mailing list: https://launchpad.net/~openstack > >Post to : [email protected] > >Unsubscribe : https://launchpad.net/~openstack > >More help : https://help.launchpad.net/ListHelp > > > > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : [email protected] > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > -- +Hugo Kuo+ [email protected] + <[email protected]>886 935004793
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