Am Mittwoch, 2. Juli 2003 20:59 schrieb Chris Mason:
> On Wed, 2003-07-02 at 14:53, Hans Reiser wrote:
> > >This is called ordered data mode, and exists on ext3 and also reiserfs
> > > with Chris Mason's patches. Under normal usage it shouldn't change
> > > performance compared to writeback data mode (which is what reiserfs
> > > does by default).
Chris,
I thought data=ordered is the "new" default with your patch?
> > It had some impact, I forget exactly how much, maybe Chris can
> > resuscitate his benchmark of it?
>
> The major cost of data=ordered is that dirty blocks are flushed every 5
> seconds instead of every 30. The journal header patch in my
> experimental data logging directory changes things so that only new
> bytes in the file are done in data=ordered mode (either adding a new
> block or appending onto the end of the file).
>
> This helps a lot in the file rewrite tests.
What's faster than with your patches? ordered|journal|writeback?
I thought is order: writeback < ordered < journal ;-)
Thanks,
Dieter
