Disk IO issues

[Kostas Georgiou]

On Sat, Jan 03, 2009 at 06:32:38PM -0600, Matt Domsch wrote:

> What ext3 journaling options are enabled (e.g. what does 'mount' say)?
> If it's data=ordered (the default), that's OK.  If it's data=journal,
> then all the data gets written twice (first to the journal, then the
> journal to the disk), which is really really slow, and the size of the
> journal would really make a difference too.

For an NFS server (assuming that you aren't exporting as async)
data=journal can give you better performance than anything else
actually. The NFS howto has a brief note in the performance section
about this.

Kostas