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From: Richard Scobie <richard@sauce.co.nz>
To: linux-raid@vger.kernel.org
Subject: Re: raid10: unfair disk load?
Date: Mon, 24 Dec 2007 08:22:31 +1300	[thread overview]
Message-ID: <476EB577.5090708@sauce.co.nz> (raw)
In-Reply-To: <cccedfc60712230623q6779369x851f0eb2587321e@mail.gmail.com>

Jon Nelson wrote:

> My own tests on identical hardware (same mobo, disks, partitions,
> everything) and same software, with the only difference being how
> mdadm is invoked (the only changes here being level and possibly
> layout) show that raid0 is about 15% faster on reads than the very
> fast raid10, f2 layout. raid10,f2 is approx. 50% of the write speed of
> raid0.

Have you tested a stacked RAID 10 made up of 2 drive RAID1 arrays, 
striped together into a RAID0.

I have found this configuration to offer very good performance, at the 
cost of slightly more complexity.

Regards,

Richard

  reply	other threads:[~2007-12-23 19:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <476BA4FD.6080401@msgid.tls.msk.ru>
2007-12-21 11:53 ` raid10: unfair disk load? Michael Tokarev
2007-12-21 16:49   ` Janek Kozicki
2007-12-21 20:56     ` Michael Tokarev
2007-12-22 12:05       ` Janek Kozicki
2007-12-22 13:04         ` Jon Nelson
     [not found]           ` <beb6123c0712222034g68743afv31c644ff4dd9aaff@mail.gmail.com>
2007-12-23 12:36             ` Michael Tokarev
     [not found]               ` <beb6123c0712230521r2a8a43aboe097fc2fc943c3ae@mail.gmail.com>
2007-12-23 14:23                 ` Jon Nelson
2007-12-23 19:22                   ` Richard Scobie [this message]
2007-12-25 20:18                     ` Bill Davidsen

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