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Re: xfs preallocation timeout

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: xfs preallocation timeout
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 13 Feb 2009 09:08:03 +1100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <200902111522.11987@xxxxxx>
Mail-followup-to: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <200902111522.11987@xxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Wed, Feb 11, 2009 at 03:22:11PM +0100, Michael Monnerie wrote:
> Does /proc/sys/vm/dirty_expire_centisecs influence the maximum time XFS 
> takes before the "in-memory but not on disk" preallocation actually 
> starts writing to disk?

Yes.

BTW, you are referring to "delayed allocation", not
"pre-allocation". Pre-allocation is the act of immediately
allocating space on disk without writing data; delayed allocation is
avoiding allocation until the data is to be written to disk...

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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