linux-kernel - Re: Solaris ZFS on Linux [Was: Re: the " 'official' point of view"expressed by kernelnewbies.org regarding reiser4 inclusion]

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Message-ID: <44CF2112.8040202@argo.co.il>
Date:	Tue, 01 Aug 2006 12:38:26 +0300
From:	Avi Kivity <avi@...o.co.il>
To:	Matthias Andree <matthias.andree@....de>
CC:	Theodore Tso <tytso@....edu>,
	David Lang <dlang@...italinsight.com>,
	David Masover <ninja@...phack.com>, tdwebste2@...oo.com,
	Nate Diller <nate.diller@...il.com>,
	Adrian Ulrich <reiser4@...nkenlights.ch>,
	"Horst H. von Brand" <vonbrand@....utfsm.cl>, ipso@...ppymail.ca,
	reiser@...esys.com, lkml@...productions.com, jeff@...zik.org,
	linux-kernel@...r.kernel.org, reiserfs-list@...esys.com
Subject: Re: Solaris ZFS on Linux [Was: Re: the " 'official' point of view"expressed
 by kernelnewbies.org regarding reiser4 inclusion]

Matthias Andree wrote:
>
> On Tue, 01 Aug 2006, Avi Kivity wrote:
>
> > There's no reason to repack *all* of the data.  Many workloads write 
> and
> > delete whole files, so file data should be contiguous.  The repacker
> > would only need to move metadata and small files.
>
> Move small files? What for?
>

WAFL-style filesystems like contiguous space,  so if small files are 
scattered in otherwise free space, the repacker should free them.

> Even if it is "only" moving metadata, it is not different from what ext3
> or xfs are doing today (rewriting metadata from the intent log or block
> journal to the final location).
>

There is no need to repack all metadata; only that which helps in 
creating free space.

For example: if you untar a source tree you'd get mixed metadata and 
small file data packed together, but there's no need to repack that data.


-- 
error compiling committee.c: too many arguments to function

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