From: Dexter Filmore <Dexter.Filmore@gmx.de>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: below 10MB/s write on raid5
Date: Mon, 11 Jun 2007 16:06:10 +0200 [thread overview]
Message-ID: <200706111606.11006.Dexter.Filmore@gmx.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0706110928420.31708@p34.internal.lan>
> 10gb read test:
>
> dd if=/dev/md0 bs=1M count=10240 of=/dev/null
>
> What is the result?
71,7MB/s - but that's reading to null. *writing* real data however looks quite
different.
>
> I've read that LVM can incur a 30-50% slowdown.
>
Even then the 8-10MB/s I get would be a little low.
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next prev parent reply other threads:[~2007-06-11 14:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-11 12:46 below 10MB/s write on raid5 Dexter Filmore
2007-06-11 12:47 ` Justin Piszcz
2007-06-11 13:28 ` Dexter Filmore
2007-06-11 13:29 ` Justin Piszcz
2007-06-11 13:45 ` Jon Nelson
2007-06-11 13:53 ` Justin Piszcz
2007-06-11 14:06 ` Dexter Filmore [this message]
2007-06-11 14:07 ` Justin Piszcz
2007-06-11 22:24 ` Nix
2007-06-12 2:35 ` Jon Nelson
2007-06-13 23:54 ` Nix
2007-06-14 9:15 ` Michael Tokarev
2007-06-13 23:55 ` Nix
2007-06-12 17:16 ` Bill Davidsen
2007-06-12 17:14 ` Justin Piszcz
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