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

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: Premature "No Space left on device" on XFS
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sun, 9 Oct 2011 10:46:17 -0400
Cc: Bernhard Schmidt <berni@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <20111008223404.GM3159@dastard>
References: <4E8E079B.4040103@xxxxxxxxxxxxx> <20111007013711.GW3159@dastard> <4E8F0385.7060906@xxxxxxxxxxxxx> <20111007231410.GG3159@dastard> <4E90422E.3060805@xxxxxxxxxxxxx> <20111008131809.GB25855@xxxxxxxxxxxxx> <20111008223404.GM3159@dastard>
User-agent: Mutt/1.5.21 (2010-09-15)
On Sun, Oct 09, 2011 at 09:34:04AM +1100, Dave Chinner wrote:
> Just bear in mind that this can result in all inodes being allocated
> in the same AG, thereby serialising all future file creation and
> deletion in the filesystem. If you take this route, using a directory
> hashing scheme is, IMO, absolutely necessary.

Only if you preallocate all inodes in the same directory, else you
get them spread around.  But either way the hashing scheme probably
is the much better idea.

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