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From: Robin Bowes <robin-lists@robinbowes.com>
To: linux-raid@vger.kernel.org
Subject: Re: non-optimal RAID 5 performance with 8 drive array
Date: Tue, 01 Mar 2005 17:53:54 +0000	[thread overview]
Message-ID: <d029u5$65p$1@sea.gmane.org> (raw)
In-Reply-To: <42246D1F.3070407@variant.ch>

Nicola Fankhauser wrote:
> see [3] for a description of what I did and more details.

Hi Nicola,

I read your description with interest.

I thought I'd try some speed tests myself but dd doesn't seem to work 
the same for me (on FC3). Here's what I get:

[root@dude test]# dd if=/dev/zero of=/home/test/test.tmp bs=4096 
count=100000
100000+0 records in
100000+0 records out

Notice there is no timing information.

For the read test:

[root@dude test]# dd of=/dev/null if=/home/test/test.tmp bs=4096
100000+0 records in
100000+0 records out

Again, no timing information.

Anyone know if this is a quirk of the FC3 version of dd?

R.
-- 
http://robinbowes.com


  reply	other threads:[~2005-03-01 17:53 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-03-01 13:24 non-optimal RAID 5 performance with 8 drive array Nicola Fankhauser
2005-03-01 17:53 ` Robin Bowes [this message]
2005-03-01 18:04   ` Roberto Fichera
2005-03-01 18:12     ` Robin Bowes
2005-03-01 18:41       ` Roberto Fichera
2005-03-02 23:08         ` dd with bytes/sec patch [was: non-optimal RAID 5 performance with 8 drive array] Tim Moore
2005-03-04 22:23 ` non-optimal RAID 5 performance with 8 drive array Matthias Julius
2005-03-06 14:25 ` Stephan van Hienen
2005-03-06 14:43   ` Nicola Fankhauser
2005-03-06 17:09     ` Stephan van Hienen

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