From: Erik Mouw <erik@harddisk-recovery.com>
To: Nikita Danilov <Nikita@Namesys.COM>
Cc: Josh Litherland <josh@temp123.org>, linux-kernel@vger.kernel.org
Subject: Re: Transparent compression in the FS
Date: Wed, 15 Oct 2003 16:27:38 +0200 [thread overview]
Message-ID: <20031015142738.GG24799@bitwizard.nl> (raw)
In-Reply-To: <16269.20654.201680.390284@laputa.namesys.com>
On Wed, Oct 15, 2003 at 05:50:38PM +0400, Nikita Danilov wrote:
> Erik Mouw writes:
> > Nowadays disks are so incredibly cheap, that transparent compression
> > support is not realy worth it anymore (IMHO).
>
> But disk bandwidth is so incredibly expensive that compression becoming
> more and more useful: on compressed file system bandwidth of user-data
> transfers can be larger than raw disk bandwidth. It is the same
> situation as with allocation of disk space for files: disks are cheap,
> but storing several files in the same block becomes more advantageous
> over time.
You have a point, but remember that modern IDE drives can do about
50MB/s from medium. I don't think you'll find a CPU that is able to
handle transparent decompression on the fly at 50MB/s, even not with a
simple compression scheme as used in NTFS (see the NTFS docs on
SourceForge for details).
Erik
PS: let me guess: among other things, reiser4 comes with transparent
compression? ;-)
--
+-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 --
| Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands
| Data lost? Stay calm and contact Harddisk-recovery.com
next prev parent reply other threads:[~2003-10-15 14:27 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-14 20:30 Transparent compression in the FS Josh Litherland
2003-10-15 13:33 ` Erik Mouw
2003-10-15 13:45 ` Josh Litherland
2003-10-15 13:50 ` Nikita Danilov
2003-10-15 14:27 ` Erik Mouw [this message]
2003-10-15 14:33 ` Nikita Danilov
2003-10-15 15:54 ` Richard B. Johnson
2003-10-15 16:21 ` Nikita Danilov
2003-10-15 17:19 ` Richard B. Johnson
2003-10-15 17:37 ` Andreas Dilger
2003-10-15 17:48 ` Dave Jones
2003-10-15 18:19 ` Richard B. Johnson
2003-10-15 18:06 ` Hans Reiser
2003-10-17 12:51 ` Edward Shushkin
2003-10-15 16:04 ` Erik Mouw
2003-10-15 17:24 ` Josh Litherland
2003-10-15 18:53 ` Erik Bourget
2003-10-15 19:03 ` Geert Uytterhoeven
2003-10-15 19:14 ` Valdis.Kletnieks
2003-10-15 19:24 ` Geert Uytterhoeven
2003-10-15 18:54 ` root
2003-10-16 2:11 ` Chris Meadors
2003-10-16 3:01 ` Shawn
2003-10-15 14:47 ` Erik Bourget
2003-10-15 15:05 ` Nikita Danilov
2003-10-15 15:06 ` Erik Bourget
2003-10-15 21:36 ` Tomas Szepe
2003-10-16 8:04 ` Ville Herva
2003-10-17 1:32 ` Eric W. Biederman
2003-10-15 15:13 ` Jeff Garzik
2003-10-15 21:00 ` Christopher Li
2003-10-16 16:29 ` Andrea Arcangeli
2003-10-16 16:41 ` P
2003-10-16 17:20 ` Jeff Garzik
2003-10-16 23:12 ` jw schultz
2003-10-17 8:03 ` John Bradford
2003-10-17 14:53 ` Eli Carter
2003-10-17 15:27 ` John Bradford
2003-10-17 16:22 ` Eli Carter
2003-10-17 17:15 ` John Bradford
2003-10-16 17:10 ` Jeff Garzik
2003-10-16 17:41 ` Andrea Arcangeli
2003-10-16 17:29 ` Larry McVoy
2003-10-16 17:49 ` Val Henson
2003-10-16 21:02 ` Jeff Garzik
2003-10-16 21:18 ` Chris Meadors
2003-10-16 21:25 ` Jeff Garzik
2003-10-16 21:33 ` Davide Libenzi
2003-10-17 3:47 ` Mark Mielke
2003-10-17 14:31 ` Jörn Engel
2003-10-16 23:04 ` jw schultz
2003-10-16 23:30 ` Jeff Garzik
2003-10-16 23:58 ` jw schultz
2003-10-16 23:53 ` David Lang
2003-10-17 1:19 ` Jeff Garzik
2003-10-17 0:45 ` Christopher Li
2003-10-17 1:16 ` Jeff Garzik
2003-10-17 1:32 ` jlnance
2003-10-17 1:47 ` Eric Sandall
2003-10-17 8:11 ` John Bradford
2003-10-17 17:53 ` Eric Sandall
2003-10-17 13:07 ` jlnance
2003-10-17 14:16 ` Jeff Garzik
2003-10-17 15:06 ` Valdis.Kletnieks
2003-10-17 1:49 ` Davide Libenzi
2003-10-17 1:59 ` Larry McVoy
2003-10-17 2:19 ` jw schultz
2003-10-17 9:44 ` Pavel Machek
2003-10-17 12:33 ` jlnance
2003-10-17 18:23 ` jw schultz
2003-10-27 2:08 ` Mike Fedyk
2003-10-27 2:15 ` jw schultz
2003-10-27 2:22 ` Mike Fedyk
2003-10-27 2:45 ` jw schultz
2003-10-16 18:28 ` John Bradford
2003-10-16 18:31 ` Robert Love
2003-10-16 20:18 ` Jeff Garzik
2003-10-16 18:43 ` Muli Ben-Yehuda
2003-10-16 18:56 ` Richard B. Johnson
2003-10-16 19:00 ` Robert Love
2003-10-16 19:27 ` John Bradford
2003-10-16 19:03 ` John Bradford
2003-10-16 19:20 ` Richard B. Johnson
2003-10-17 13:16 ` Ingo Oeser
2003-10-16 23:20 ` jw schultz
2003-10-17 14:47 ` Eli Carter
2003-10-16 8:27 ` tconnors+linuxkernel1066292516
2003-10-17 10:55 ` Ingo Oeser
2003-10-15 16:25 ` David Woodhouse
2003-10-15 16:56 ` Andreas Dilger
2003-10-15 17:44 ` David Woodhouse
[not found] <GTJr.60q.17@gated-at.bofh.it>
[not found] ` <GU2N.6v7.17@gated-at.bofh.it>
[not found] ` <GVBC.Ep.23@gated-at.bofh.it>
[not found] ` <Hjkq.3Al.1@gated-at.bofh.it>
[not found] ` <Hkgx.4Vu.7@gated-at.bofh.it>
[not found] ` <HkA0.5lh.9@gated-at.bofh.it>
[not found] ` <HnxT.3BB.27@gated-at.bofh.it>
2003-10-17 8:15 ` Ihar 'Philips' Filipau
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