On Wednesday 20 February 2013 15:11:59 Riku Valli wrote:
> On 02/20/2013 02:44 PM, Dag Nygren wrote:
> > On Wednesday 20 February 2013 09:47:12 Claessen, John wrote:
> >
> >> 2. There is not really a maximum, but EMC is advising to put no more than 
> >> 50 
> > clients in 1 group.
> >> Better have 10 groups start every 5 minutes than 100 clients start at the 
> > same time in 1 group.
> >
> > Interesting!
> > Can you give me a reference to that advice? I have seen a lot more problems 
> > with many groups than with less groups, resource starvation etc.
> >
> > Best
> > Dag
> Read Networker Performance Tuning Guide (s 36)
> 
> The best approach for group parallelism values is:
> 
> ◆ Create save groups with a maximum of 50 clients with group parallelism
> enforced. Large save groups with more than 50 clients can result in many
> operating system processes starting at the same time causing temporary
> operating system resource exhaustion.
> 
> ◆ Stagger save group start times by a small amount to reduce the load on the
> operating system. For example, it is best to have 4 save groups, each
> with 50
> clients, starting at 5 minute intervals than to have 1 save group with
> 200 clients.
> 
> Read more from guide.

Thanks!

Very interesting, - And not the first time the guide doesn't really agree very
well with observed behakviour :-)

Best
Dag