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Re: XFS unlink still slow on 3.1.9 kernel ?

To: Richard Ems <richard.ems@xxxxxxxxxxxxxxxxx>
Subject: Re: XFS unlink still slow on 3.1.9 kernel ?
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 13 Feb 2012 16:16:54 -0500
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <4F395B1A.7010709@xxxxxxxxxxxxxxxxx>
References: <20120213170825.GA7197@xxxxxxxxxxxxx> <4F394442.9020307@xxxxxxxxxxxxxxxxx> <20120213171556.GA13449@xxxxxxxxxxxxx> <4F3947D6.5060402@xxxxxxxxxxxxxxxxx> <20120213172937.GA25248@xxxxxxxxxxxxx> <4F394E10.9000804@xxxxxxxxxxxxxxxxx> <20120213180220.GA24163@xxxxxxxxxxxxx> <4F395134.8030202@xxxxxxxxxxxxxxxxx> <20120213181012.GA27962@xxxxxxxxxxxxx> <4F395B1A.7010709@xxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Mon, Feb 13, 2012 at 07:48:58PM +0100, Richard Ems wrote:
> I already updated to 3.2.4 and started the same "find dir" command again
> that previously took 100 min to run. It has been running now for over 30
> min ...
> 
> Should this "find" run time also improve ?

No, not by that change anyway.

> Or will only unlink run time improve ?

Yes.

> Do I have to mount the XFS partition with some new/old/special option?

I'd have to look into it in more detail.  IIRC you said you're using
RAID6 which can be fairly nasty for small reads.  Did you use the
inode64 mount option on the filesystem?

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