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Re: XFS defragmentation issue

To: xfs@xxxxxxxxxxx
Subject: Re: XFS defragmentation issue
From: Roel van Meer <rolek@xxxxxxxxxx>
Date: Mon, 13 Sep 2010 10:05:25 +0200
References: <4C8A4395.5070702@xxxxxxxxxxxxx> <4C8B27E4.2050102@xxxxxxxxxxxxx> <20100911082330.GG705@dastard> <4C8BDAC8.8010203@xxxxxxxxxxxxxxxxx>
Stan Hoeppner writes:

Out of curiosity, who here schedules automatic xfs_fsr runs, and with
what frequency?  Currently I just run it manually now and then when
performance starts to seem sluggish.

I run it daily during the week, at a time when load is practically nil, on two boxes with 24TB storage each, divided into six parts of about 4GB. A 10-pass xfs_fsr run usually completes in under one hour, except on monday, when it takes three to four hours.

I don't have any stats on the net effect, though.



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