Re: Numbers: ext2/ext3/reiser Performance (ext3 is slow)

From: arjan@fenrus.demon.nl
Date: Sat Nov 10 2001 - 09:47:59 EST


In article <Pine.LNX.4.40.0111101516050.14500-100000@omega.hbh.net> you wrote:

> Hello !

> Anyone has an idea, why this ext3 "fails" at this specific test while on
> normal fs-benchmarks it is much better ?

ext3 by default imposes stricter ordering than the other journalling
filesystems in order to improve _data_ consistency (as opposed to just
the guarantee of consistent metadata as most other filesystems do).
if you mount the filesystem with

mount -t ext3 -o data=writeback /dev/foo /mnt/bar

will make it use the same level of guarantee as reiserfs does.

mount -t ext3 -o data=journal /dev/foo /mnt/bar

will do FULL data journalling and will also guarantee data integrety after a
crash...

Greetings,
   Arjan van de Ven
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Thu Nov 15 2001 - 21:00:25 EST