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

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Message-ID: <47F26278.5070009@zytor.com>
Date:	Tue, 01 Apr 2008 09:27:36 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Artem Bityutskiy <dedekind@...dex.ru>
CC:	Andi Kleen <andi@...stfloor.org>,
	Tomasz Chmielewski <mangoo@...g.org>,
	LKML <linux-kernel@...r.kernel.org>, penberg@...helsinki.fi,
	Jörn Engel <joern@...fs.org>,
	ext-adrian.hunter@...ia.com, jwboyer@...il.com
Subject: Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS - new flash file system)

Artem Bityutskiy wrote:
> Andi Kleen wrote:
>> Artem Bityutskiy <dedekind@...dex.ru> writes:
>>
>>> Tomasz Chmielewski wrote:
>>>> 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:
>>> Sorry Thomasz, for me this makes zero sense. There are _much_ better 
>>> file
>>> systems for block devices.
>>
>> I think he refers to flash disks appearing as block devices, like
>> usb sticks or similar.
> 
> Right, I also meant that in my opinion it makes more sense to use 
> traditional
> file-systems like ext3 on USB-key/MMC and the like stuff (which I 
> confusingly
> referred as "block devices"), or may be something more "heavy-weight" like
> XFS or JFS (never tried them, though).
> 

Well, even auto-levelling storage should benefit from a filesystem which 
minimizes the total number of flash sectors churned, which means doing 
as few writes as possible and to large, contiguous sections.

	-hpa
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