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Re: xfsdump slow on large filesystem.

To: Eugene Melamud <melamud@xxxxxxxxxxxx>
Subject: Re: xfsdump slow on large filesystem.
From: Jan Derfinak <ja@xxxxxxxxxxxx>
Date: Sat, 23 Jul 2005 23:35:41 +0200 (CEST)
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <20050718181758.7467.qmail@web50708.mail.yahoo.com>
References: <20050718181758.7467.qmail@web50708.mail.yahoo.com>
Sender: linux-xfs-bounce@xxxxxxxxxxx
On Mon, 18 Jul 2005, Eugene Melamud wrote:

> Greetings, 
> 
> I am getting really miserable results from xfsdump when mirroring large 
> filesystem over network.
> The command I run on the source computer is this.
> 
> xfsdump -A -J - /dev/sda1 | ssh node22 xfsrestore -J -A - /backup
> 

http://oss.sgi.com/archives/linux-xfs/2005-05/msg00166.html

...

> There is an initial slow down when xfsdump computes tree and inode attributes 
> for transfer, but
> after that I would think it should really kick in. May be it has something to 
> do with operating
> system, ( RHEL3 on source machine, CentOS4 on destination, xfsdump version 
> 2.2.25-1). I know I
> know,I should have gone with SUSE.

If RHEL3 doesn't support ihashsize, you should try newer kernel.

jan

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