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Re: Speed up xfsdump ?

To: linux-xfs@xxxxxxxxxxx
Subject: Re: Speed up xfsdump ?
From: Nicolas Kowalski <Nicolas.Kowalski@xxxxxxx>
Date: Tue, 13 Sep 2005 10:44:54 +0200
In-reply-to: <4325BA69.4070709@xxxxxxx>
References: <Pine.LNX.4.63.0509121822550.3870@xxxxxxxxxxxxxxx> <4325BA69.4070709@xxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
On Mon, 12 Sep 2005, Bill Kendall wrote:

> On 09/12/05 11:43, Nicolas Kowalski wrote:
> > 
> > 2) The tests
> > 
> > 2.a) xfsdump
> > 
> > command used: xfsdump -J - /raid | dd obs=64k of=/dev/nst0
> > 
> > dd shows: 5985202 bytes/sec
> > 
> Try the dump this way and see if performance improves:
> 
> xfsdump -J -f /dev/nst0 -b 1048576 -d 8192 /raid

Using this exact command line (plus '-p 300' to see the status) does not 
improve the speed. At the end, xfsdump shows me:

xfsdump: dump size (non-dir files) : 28364433152 bytes
xfsdump: dump complete: 4746 seconds elapsed

This gives 5976492 bytes/sec.

-- 
Nicolas


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