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Re: XFS unlink still slow on 3.1.9 kernel ?

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: XFS unlink still slow on 3.1.9 kernel ?
From: Richard Ems <richard.ems@xxxxxxxxxxxxxxxxx>
Date: Mon, 13 Feb 2012 19:18:47 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20120213181012.GA27962@xxxxxxxxxxxxx>
References: <4F394116.8080200@xxxxxxxxxxxxxxxxx> <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>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120129 Thunderbird/10.0.1
On 02/13/2012 07:10 PM, Christoph Hellwig wrote:
> On Mon, Feb 13, 2012 at 07:06:44PM +0100, Richard Ems wrote:
>> So
>>
>> 1. use kernels > 3.2, if XFS partition was not created using "-i size=1024"
> 
> Yes.
> 
>> 2. if XFS partition was created using "-i size=1024", kernels < 3.2 will
>> also be fast while unlinking files with out of line attributes
> 
> Exactly.
> 
> For workloads like yours creating the large inodes (probably only with
> 512 byte inodes, though) will be preferably if you have a choice, as it
> should be even faster.

Ok, I see. I will do it on all new XFS partitions, since we heavily use
ACLs.

Many thanks,
Richard

-- 
Richard Ems       mail: Richard.Ems@xxxxxxxxxxxxxxxxx

Cape Horn Engineering S.L.
C/ Dr. J.J. Dómine 1, 5º piso
46011 Valencia
Tel : +34 96 3242923 / Fax 924
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