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Re: Problems with many processes copying directories on XFS

To: Simon Matter <simon.matter@xxxxxxxxxxxxxxxx>
Subject: Re: Problems with many processes copying directories on XFS
From: Jean-Francois Landry <jflandry@xxxxxxxxxx>
Date: Thu, 13 Sep 2001 16:52:14 -0400
Cc: linux-xfs <linux-xfs@xxxxxxxxxxx>
In-reply-to: <3BA0A6BA.84D64FE1@ch.sauter-bc.com>; from simon.matter@ch.sauter-bc.com on Thu, Sep 13, 2001 at 02:29:46PM +0200
References: <3BA08004.A2FBC956@ch.sauter-bc.com> <3BA0A6BA.84D64FE1@ch.sauter-bc.com>
Reply-to: jflandry@xxxxxxxxxx
Sender: owner-linux-xfs@xxxxxxxxxxx
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On Thu, Sep 13, 2001 at 02:29:46PM +0200, Simon Matter wrote:
 
> Well since nobody seems interested I'm replying myself. I didn't realize
> that I created a filesystem with more than 1.8 mio files with my 'stress
> test'.
<snip some lines>

>Okay something goes wrong here as well but now I want to
> see the ReiserFS deletion speed. 'rm -rf 0*' should go fast but -
> surprise - it took more than 30min!

>-Simon
 
OK, this is kind of off-topic, but that behavior is to be expected if
your ReiserFS fs (hmm, can I say that?) uses the tea hash. Since you
mention a 2.2 kernel it's quite possible your fs was created while the
tea hash was the default. You might want to retry with the r5 hash,
since tea bogs down after say, about 500k files or so.

For more info on this, search the reiserfs-list archives for a thread by
me concerning freedb. I seem to have accidentaly "rediscovered" this
bug while testing deletion speeds :) The thread is a couple of months
old.

Hope this helps,
        Jean-Francois Landry
-- 
So many lusers, so little ammunition.
--


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