linux-kernel - Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS

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Message-ID: <20080409210907.GA9683@ucw.cz>
Date:	Wed, 9 Apr 2008 23:09:07 +0200
From:	Pavel Machek <pavel@....cz>
To:	Tomasz Chmielewski <mangoo@...g.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, penberg@...helsinki.fi,
	Jörn Engel <joern@...fs.org>,
	ext-adrian.hunter@...ia.com, jwboyer@...il.com,
	"Artem B. Bityutskiy" <dedekind@...dex.ru>
Subject: Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS - new flash file system)

Hi!

> For me, the motivators to wait for LogFS are mainly the 
> facts that it
> can work on traditional block devices, and not only on 
> pure flash:
> 
> 1. It works on normal block devices and it supports 
> transparent compression
> 
> Today, a 64 GB SSD/flash-based media costs ~about the 
> same as a 1 TB
> hard disk. This makes flash very expensive to use; 
> compression can
> compensate that cost a bit (will depend on the usage, of 
> course).
> 
> I believe there is no other Linux filesystem which can 
> do transparent
> compression on block devices.

I'd like compressed filesystem for maps and lingvistic data... but
will the flash flesystems have 'reasonable' performance when used on
harddrive?
							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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