From: Derek Fawcus <dfawcus@cisco.com>
To: git@vger.kernel.org
Subject: Re: space compression (again)
Date: Fri, 15 Apr 2005 20:00:54 +0100 [thread overview]
Message-ID: <20050415200054.F6735@mrwint.cisco.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0504151437100.27637@cag.csail.mit.edu>; from cscott@cscott.net on Fri, Apr 15, 2005 at 02:45:55PM -0400
On Fri, Apr 15, 2005 at 02:45:55PM -0400, C. Scott Ananian wrote:
> > - we already have wasted space due to the low-level filesystem (as
> > opposed to "git") usually being block-based, which means that space
> > utilization for small objects tends to suck. So you really want to
> > prefer objects that are several kB (compressed), and a small block just
> > wastes tons of space.
>
> Not on (say) reiserfs, and not over the network. I'm proposing (at the
> moment) easy conversion from chunked to unchunked disk representation,
> so that you can leave things unchunked if (for example) you know you're
> running ext2 with a large block size.
Or if one does not care about space, and simply want's speed, add another
layer of indirection - a flattened container object which has hashses as
normal, then as it's content simply has the 'chunk list object' and the
'chunk objects' concatenated.
It's then a per user / database as to if the flattened objects, or the
heirarcal objects are storred locally.
DF
next prev parent reply other threads:[~2005-04-15 18:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-15 17:19 space compression (again) C. Scott Ananian
2005-04-15 18:34 ` Linus Torvalds
2005-04-15 18:45 ` C. Scott Ananian
2005-04-15 19:00 ` Derek Fawcus [this message]
2005-04-15 19:11 ` Linus Torvalds
2005-04-16 14:39 ` Martin Uecker
2005-04-16 15:11 ` C. Scott Ananian
2005-04-16 17:37 ` Martin Uecker
2005-04-19 12:39 ` Martin Uecker
2005-04-15 18:50 ` Derek Fawcus
-- strict thread matches above, loose matches on Subject: below --
2005-04-15 19:33 Ray Heasman
2005-04-16 12:29 ` David Lang
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