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To: "ALeine" <aleine@austrosearch.net>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 02 Mar 2005 11:10:16 PST."
             <200503021910.j22JAGCH081224@marlena.vvi.at> 
Date: Thu, 03 Mar 2005 17:31:34 +0100
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Subject: Re: FUD about CGD and GBDE 
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In message <200503021910.j22JAGCH081224@marlena.vvi.at>, "ALeine" writes:

>Not necessarily, if one were to implement the ideas I proposed
>I believe the performance could be kept at the same level as now.

I gave up on journalling myself because IMO it complicates
things a lot and the problem it solves is very very small.

The impact in disk seeks is non-trivial to predict, but it is
very hard to argue that it will not lead to an increase in
disk seeks.  (This is really a variant of the age old argument
between jounaling filesystems and "traditional" filesystems)

I can only recommend that you try :-)

We need more ideas and more people trying out ideas.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.