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[Discuss] SW vs HW raid (was raid controller drivers)
- Subject: [Discuss] SW vs HW raid (was raid controller drivers)
- From: jabr at blu.org (John Abreau)
- Date: Fri, 26 Sep 2014 12:41:16 -0400
- In-reply-to: <b24f28ea21784544beb34cfa769648a5@CO2PR04MB684.namprd04.prod.outlook.com>
- References: <aa0b2e38da5949028328345f136e25cb@CO2PR04MB684.namprd04.prod.outlook.com> <CA+h9Qs6Rcr2aReGJjSZtZhu-ygtEKfSdAX47r-mN32aAe4T+9A@mail.gmail.com> <b24f28ea21784544beb34cfa769648a5@CO2PR04MB684.namprd04.prod.outlook.com>
I think I see it now. I said I prefer software raid over hardware raid, and your response is that zfs software raid is preferable to hardware raid. So basically, you're disagreeing with the same arguments that I was disagreeing with, and I misread it as you disagreeing with my argument. On Fri, Sep 26, 2014 at 10:11 AM, Edward Ned Harvey (blu) <blu at nedharvey.com > wrote: > > From: jabr at gapps.blu.org [mailto:jabr at gapps.blu.org] On Behalf Of John > > Abreau > > > > I don't see how ZFS is a counterexample. I'm aware of ZFS as a software > > component of the OS, but I've never even heard of ZFS being baked into > the > > disk controller below the level of the OS. > > > > An argument about ZFS as an alternative to both hardware and software > > RAID would be completely orthogonal to an argument about the relative > > merits of hardware vs software RAID. It wouldn't be a counterexample; > > instead, it would be an entirely different discussion. > > ZFS does software raid, and because it has intimate knowledge of the > filesystem (not just doing raid at the block level) it is able to do > performance optimizations that cannot be done with hardware raid (having > only knowledge of the block level). So ZFS software raid outperforms > hardware raid. > > Did that make it clearer? > -- John Abreau / Executive Director, Boston Linux & Unix Email jabr at blu.org / WWW http://www.abreau.net / PGP-Key-ID 0x920063C6 PGP-Key-Fingerprint A5AD 6BE1 FEFE 8E4F 5C23 C2D0 E885 E17C 9200 63C6
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- [Discuss] SW vs HW raid (was raid controller drivers)
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- [Discuss] SW vs HW raid (was raid controller drivers)
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- [Discuss] SW vs HW raid (was raid controller drivers)
- From: jabr at blu.org (John Abreau)
- [Discuss] SW vs HW raid (was raid controller drivers)
- From: blu at nedharvey.com (Edward Ned Harvey (blu))
- [Discuss] SW vs HW raid (was raid controller drivers)
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