[Ocfs2-devel] odirect hack

[Mark Fasheh]

On Fri, Oct 01, 2010 at 03:09:45PM -0700, Sunil Mushran wrote:
> I was discussing with Joel whether it was time for us to special
> case the odirect hack we've had since day 1. The one that allows
> concurrent odirect writes.

Right.


> I am wondering whether we should allow users control that behavior
> via a mount option. parallel_directio, maybe.

I think that's got a lot of usefulness, so yeah I'd definitely be behind
this. IMHO, we should take the opportunity to clearly define what it means
for the customer too:

"With this, parallel direct I/O from multiple nodes will be allowed. This
increases throughput on some workloads dramatically but at the expense of
inode mtime updates..." etc etc.
	--Mark

--
Mark Fasheh