Re: [RFC PATCH] UBIFS - new flash file system
From: Adrian Hunter
Date: Mon Mar 31 2008 - 08:52:53 EST
Jan Engelhardt wrote:
On Thursday 2008-03-27 15:55, Artem Bityutskiy wrote:
here is a new flash file system developed by Nokia engineers with
help of the University of Szeged. The new file-system is called
UBIFS, which stands for UBI file system. UBI is the wear-leveling/
bad-block handling/volume management layer which is already in
mainline (see drivers/mtd/ubi).
[...]
And how does it compare to logfs?
We don't know a lot about logfs, so you will really have to make
your own comparison. However our general impressions are as follows:
1. In our testing logfs file operations seem to be much slower,
see http://osl.sed.hu/wiki/ubifs/index.php/IOzone
2. logfs code base is much smaller i.e. UBIFS has 3-4 times as many
lines of code.
3. logfs does not seem to have bad-block handling.
4. logfs does not seem to have wear-leveling.
5. We are not certain how scalable logfs is.
We could be wrong about those things - don't flame us if we are.
Ask us about UBIFS, not logfs.
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