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Re: Premature "No Space left on device" on XFS

To: Bernhard Schmidt <berni@xxxxxxxxxxxxx>
Subject: Re: Premature "No Space left on device" on XFS
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sat, 8 Oct 2011 09:18:09 -0400
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <4E90422E.3060805@xxxxxxxxxxxxx>
References: <4E8E079B.4040103@xxxxxxxxxxxxx> <20111007013711.GW3159@dastard> <4E8F0385.7060906@xxxxxxxxxxxxx> <20111007231410.GG3159@dastard> <4E90422E.3060805@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Sat, Oct 08, 2011 at 02:29:34PM +0200, Bernhard Schmidt wrote:
> Can I avoid XFS giving ENOSPC due to inode shortage even in worst
> case situations? I would be fine preallocating 1 GB for inode
> storage if that would fix the problem. ext4 with bytes-per-inode =
> blocksize does this fine.

It's a bit of a hack, but you can do that fairly easily by:

 - mounting the filesystem with the ikeep option
 - creating the numbers of inodes you need (use a worst case allocation)
   before starting the workload

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