Re: [HPDD-discuss] time until qos_prio_free=0 has an impact
On Oct 8, 2014, at 1:26 AM, Michael Kluge <michael.kluge(a)tu-dresden.de>
wrote:
> I thought the oss servers would dynamically create more threads
up to
> a limit of 512, so I would expect the load to max out around that
> same point unless the number of threads has been increased on
> purpose.
Is it 512 per OST, I think. On the oss I have 12 active OSTs and about 3000 active
ll_ost_io threads.
Hmmm. That's interesting. I always assumed that the oss server threads were not tied
to any particular ost. Therefore, when the lustre manual explains how to increase the oss
thread count, I assumed that meant it was intended to increase the size of the total pool
of threads. Looking back at the manual, it doesn't seem to clearly explain one way or
the other.
Are there any other lustre developers/experts that can confirm Michael's statement?
If so, I think the manual needs to add a sentence to make the distinction clear.
--
Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences
http://www.nics.tennessee.edu