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Re: Defragging XFS File Systems

To: xfs@xxxxxxxxxxx
Subject: Re: Defragging XFS File Systems
From: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 9 Jun 2011 07:49:36 +0200
Cc: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>, Kenneth Emerson <kenneth.emerson@xxxxxxxxx>
In-reply-to: <4DEFE2E6.9010206@xxxxxxxxxxxxxxxxx>
Organization: it-management http://it-management.at
References: <BANLkTi=40mmE+DCbLcSWBwNQtWpP=N=tXw@xxxxxxxxxxxxxx> <BANLkTikBSL8-eTAbF7a94ckLuZNyWCM=Eg@xxxxxxxxxxxxxx> <4DEFE2E6.9010206@xxxxxxxxxxxxxxxxx>
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On Mittwoch, 8. Juni 2011 Kenneth wrote:
> > After that, I will make
> > a cron job to run on a regular basis to keep the volume from
> > getting so fragmented again.

How will you do that? Running xfs_fsr on a regular basis is *not* 
recommended, as it will age your filesystem and defrag free space. In 
the beginning, and as long as your filesystem is maybe 50% full it will 
be fine, but there's a point where it starts to get worse - much worse. 
Just run a recent kernel, it has all the naughty stuff to help keep the 
performance high.

mit freundlichen Grüssen,
Michael Monnerie, Ing. BSc

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