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From: Michael Poole <mdpoole@troilus.org>
To: "Peter Stahlir" <peter.stahlir@googlemail.com>
Cc: "Karl Hasselström" <kha@treskal.com>,
	"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
	git@vger.kernel.org
Subject: Re: Git as a filesystem
Date: Fri, 21 Sep 2007 09:41:36 -0400	[thread overview]
Message-ID: <87myvgm8z3.fsf@graviton.dyn.troilus.org> (raw)
In-Reply-To: <fbe8b1780709210628u24c14117p5174bedb3d1912cb@mail.gmail.com> (Peter Stahlir's message of "Fri\, 21 Sep 2007 15\:28\:20 +0200")

Peter Stahlir writes:

> Telling git to handle -for example- deb archives and storing
> everything in a pack file would take advantage of redundancy across
> _all_ files.
> So the /usr/share/doc of all architectures could be compressed.
>
> Right?

You're proposing to trade off lots of CPU time in fetching many files
from a pack and making the package file -- paid every time someone
requests a package -- for at most 250 GB of space (cf Amdahl's law).

How long are your users willing to wait in exchange for 250 GB of
saved space?  How much CPU are you willing to spend for it?  Compare
those to the cost of a 300 GB hard drive (roughly $65).

There's also the cost to make git support the package format, and to
maintain that code going forward.  Those costs are also large.

Michael Poole

  reply	other threads:[~2007-09-21 13:41 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-21 10:51 Git as a filesystem Peter Stahlir
2007-09-21 11:11 ` Johannes Schindelin
2007-09-21 11:41   ` Peter Stahlir
2007-09-21 12:53     ` Karl Hasselström
2007-09-21 13:28       ` Peter Stahlir
2007-09-21 13:41         ` Michael Poole [this message]
2007-09-21 14:38         ` jlh
2007-09-21 17:29         ` Dmitry Potapov
2007-09-21 23:56           ` Martin Langhoff
2007-09-22  3:09             ` Sam Vilain
2007-09-21 13:22     ` Nicolas Pitre
2007-09-21 13:35       ` Peter Stahlir
2007-09-21 13:45         ` Nicolas Pitre
2007-09-21 15:46         ` Christian von Kietzell
2007-09-21 23:33       ` Eric Wong
2007-09-21 23:42         ` Johannes Schindelin
2007-09-22  2:06           ` Eric Wong
2007-09-22 12:06             ` Johannes Schindelin
2007-09-21 14:22   ` Miklos Vajna

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