From: Sander <sander@humilis.net>
To: Matt Pursley <mpursley@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: One random read streaming is fast (~1200MB/s), but two or more are slower (~750MB/s)?
Date: Wed, 17 Apr 2013 08:55:06 +0200 [thread overview]
Message-ID: <20130417065506.GA21083@panda> (raw)
In-Reply-To: <CAG42UxdVpz7a0FPEc7Ajm+jHHrqG7zT2=JaPZcFzMQT18eqzww@mail.gmail.com>
Matt Pursley wrote (ao):
> I have an LSI HBA card (LSI SAS 9207-8i) with 12 7200rpm SAS drives
> attached. When it's formated with mdraid6+ext4 I get about 1200MB/s
> for multiple streaming random reads with iozone. With btrfs in
> 3.9.0-rc4 I can also get about 1200MB/s, but only with one stream at a
> time.
Just curious, is that btrfs on top of mdraid6, or is this experimental
btrfs raid6 without md?
next prev parent reply other threads:[~2013-04-17 6:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-16 16:56 One random read streaming is fast (~1200MB/s), but two or more are slower (~750MB/s)? Matt Pursley
2013-04-17 6:55 ` Sander [this message]
2013-04-17 17:30 ` Matt Pursley
2013-04-18 1:50 ` Matt Pursley
2013-04-18 21:58 ` Josef Bacik
2013-04-25 19:52 ` Matt Pursley
2013-04-25 20:39 ` Josef Bacik
2013-04-25 21:01 ` Matt Pursley
2013-04-25 21:10 ` Josef Bacik
2013-04-26 23:21 ` Matt Pursley
2013-05-02 18:51 ` Matt Pursley
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