From: Richard Scobie <richard@sauce.co.nz>
To: linux-raid@vger.kernel.org
Subject: Re: very strange (maybe) raid1 testing results
Date: Thu, 31 May 2007 14:35:23 +1200 [thread overview]
Message-ID: <465E346B.7090701@sauce.co.nz> (raw)
In-Reply-To: <Pine.LNX.4.64.0705292135200.4266@gheavc.wnzcbav.cig>
Jon Nelson wrote:
> I am getting 70-80MB/s read rates as reported via dstat, and 60-80MB/s
> as reported by dd. What I don't understand is why just one disk is being
> used here, instead of two or more. I tried different versions of
> metadata, and using a bitmap makes no difference. I created the array
> with (allowing for variations of bitmap and metadata version):
This is normal for md RAID1. What you should find is that for concurrent
reads, each read will be serviced by a different disk, until no. of
reads = no. of drives.
Regards,
Richard
next prev parent reply other threads:[~2007-05-31 2:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-30 2:52 very strange (maybe) raid1 testing results Jon Nelson
2007-05-31 2:35 ` Richard Scobie [this message]
2007-05-31 2:58 ` Jon Nelson
2007-05-31 3:05 ` Jon Nelson
2007-05-31 4:28 ` Neil Brown
2007-05-31 12:48 ` Bill Davidsen
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