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Re: extremely slow file creation/deletion after xfs ran full

To: Carsten Aulbert <Carsten.Aulbert@xxxxxxxxxx>
Subject: Re: extremely slow file creation/deletion after xfs ran full
From: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
Date: Fri, 16 Jan 2015 10:35:27 -0500
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <54B608E7.9040702@xxxxxxxxxx>
Mail-followup-to: Carsten Aulbert <Carsten.Aulbert@xxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <54B387A1.6000807@xxxxxxxxxx> <54B3CC6A.4080405@xxxxxxxxxx> <20150112155206.GD25944@xxxxxxxxxxxxxxx> <54B3F19D.6030307@xxxxxxxxxx> <20150112163749.GE25944@xxxxxxxxxxxxxxx> <54B40552.50106@xxxxxxxxxx> <20150113203332.GD29484@destitution> <54B608E7.9040702@xxxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-12-10)
On Wed, Jan 14, 2015 at 07:12:55AM +0100, Carsten Aulbert wrote:
> Hi Dave
> On 01/13/2015 09:33 PM, Dave Chinner wrote:
> > 
> > This pattern seems to match a filesystem that was running under
> > inode32 for most of it's life, and is now using inode64 and hence
> > spreading the subdirectories and hence new inodes over all AGs
> > instead of just limiting them to AG 0....
> > 
> I fear you are right. The install logs from 2012 show, that fstab simply
> contained:
> UUID=dd407af5-1edc-41de-8c72-5fe1de31fb11 /srv xfs rw  0 2
> And our change management is not that good to track back, when we
> changed to inode64.
So, looks like Dave is right, you have been running XFS with inode32 for
the entire time (which probably overloaded AG0 from this FS) and then
changed to inode64 when it became the default option.

> OK, I think I've gathered quite a lot of things we did wrong. I'll try
> to summarize it in another email later today or tomorrow to invite a few
> more comments before we go ahead redoing the FS. Also, it may serve as
> summary for the list archive.
> For now, I want to say a very, very big thank you for remarks and
> suggestions!
> Cheers
> Carsten
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