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Date:      Wed, 2 Aug 2006 20:50:57 +1000 (EST)
From:      Dave Horsfall <dave@horsfall.org>
To:        FreeBSD Hackers <freebsd-hackers@freebsd.org>
Subject:   Re: [PATCH] adding two new options to 'cp'
Message-ID:  <Pine.BSI.4.61.0608022046450.25291@dave.horsfall.org>
In-Reply-To: <20060802073340.GA713@turion.vk2pj.dyndns.org>
References:  <44CE199C.2020500@centtech.com> <17614.8289.134373.387558@bhuda.mired.org> <96b30c400607310847s1d2f845eo212b234d03f51e9a@mail.gmail.com> <17614.10982.499561.139268@bhuda.mired.org> <ealpn1$lan$1@sea.gmane.org> <20060801072611.GA717@turion.vk2pj.dyndns.org> <20060801171150.GB3413@megan.kiwi-computer.com> <44CF8F1A.5090506@centtech.com> <20060801174048.GE3413@megan.kiwi-computer.com> <44D04797.1040201@freebsd.org> <20060802073340.GA713@turion.vk2pj.dyndns.org>

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On Wed, 2 Aug 2006, Peter Jeremy wrote:

> As a general comment (not addressed to Tim):  There _is_ a downside to 
> sparsifying files.  If you take a sparse file and start filling in the 
> holes, the net result will be very badly fragmented and hence have very 
> poor sequential I/O performance.  If you're never going to update a file 
> then making it sparse makes sense, if you will be updating it, you will 
> get better performance by making it non-sparse.

Aha!  Thanks for that, Peter.

-- Dave, wondering why anyone would *not* want sparse files...



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