Re: [OMPI users] Existing and emerging interconnects for commodity PCs

2016-03-21 Thread Gilles Gouaillardet
When I was doing presales, the vast majority of our small to middle size procurements were for a three years duration. sometimes, the maintenance was extended for one year, but the cluster was generally replaced after three years. I can understand the fastest clusters might last longer (5 years for

Re: [OMPI users] Existing and emerging interconnects for commodity PCs

2016-03-21 Thread Jeff Hammond
On Mon, Mar 21, 2016 at 6:06 AM, Gilles Gouaillardet < gilles.gouaillar...@gmail.com> wrote: > Durga, > > currently, the average life expectancy of a cluster is 3 years. > By average life expectancy, do you mean the average time to upgrade? DOE supercomputers usually run for 5-6 years, and some

Re: [OMPI users] Existing and emerging interconnects for commodity PCs

2016-03-21 Thread Jeff Squyres (jsquyres)
+1 on what Gilles says. 10 years is too lengthy of a horizon to guarantee knowledge in the fast-moving tech sector. All you can do is make good estimates based on your requirements and budget today (and what you can estimate over the next few years). > On Mar 21, 2016, at 6:06 AM, Gilles Gou

Re: [OMPI users] Existing and emerging interconnects for commodity PCs

2016-03-21 Thread Gilles Gouaillardet
Durga, currently, the average life expectancy of a cluster is 3 years. si if you have to architect a cluster out of off the shelf components, I would recommend you take the "best" components available today or to be released in a very near future. so many things can happen in 10 years, so I can on