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

To: Carsten Aulbert <Carsten.Aulbert@xxxxxxxxxx>, Brian Foster <bfoster@xxxxxxxxxx>
Subject: Re: extremely slow file creation/deletion after xfs ran full
From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
Date: Tue, 13 Jan 2015 14:06:37 -0600
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <54B40552.50106@xxxxxxxxxx>
References: <54B387A1.6000807@xxxxxxxxxx> <54B3CC6A.4080405@xxxxxxxxxx> <20150112155206.GD25944@xxxxxxxxxxxxxxx> <54B3F19D.6030307@xxxxxxxxxx> <20150112163749.GE25944@xxxxxxxxxxxxxxx> <54B40552.50106@xxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.3.0
On 01/12/2015 11:33 AM, Carsten Aulbert wrote:
...
> The FS was never grown, the machine was installed on November 5th, 2012
> and was (ab)using the FS ever since. On average there have been about
> 1-2 million file creations per day (ranging from a few kByte files to a
> few 100 kBytes) and also an equally large number of deletions (after
> some time). Thus overall, a somewhat busy server.

This workload seems more suited to a database than a filesystem. Though
surely you've already considered such, and chose not to go that route.

With high fragmentation you get lots of seeking.  What model disks are
these?  What is your RAID10 geometry?  Are your partitions properly
aligned to that geometry, and to the drives (512n/512e)?


Stan

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