[CentOS] ext3 filesystem performance question

Wed Feb 14 12:36:43 UTC 2007
Jim Perrin <jperrin at gmail.com>

On 2/14/07, Joachim Backes <joachim.backes at rhrk.uni-kl.de> wrote:
> Can somebody explain this weird behaviour. All comments are welcome.

How the raid is set up accounts for a quite a bit of the performance issues.
See the following thread in January's archive about setting up a raid
with performance in mind ->
http://lists.centos.org/pipermail/centos/2007-January/073893.html

Also, with ext3 and depending on the task, certain mount options will
speed things up considerably. Be aware that ext3 is by nature very
careful and paranoid about your data, which is why it can be slower.
Using these tuning options will speed it up, but at the cost of some
of this paranoia.  Mounting the filesystem 'noatime' and using
'commit=15' (instead of the default of 5) should also help
considerably. You may also wish to try setting 'data=writeback', which
will make ext3's journaling behave a bit more like xfs's, though
messing with the 'data' mount options should be done with care and
testing.

-- 
During times of universal deceit, telling the truth becomes a revolutionary act.
George Orwell