so basically all those old machines end up on ebay On Tue, Jan 20, 2009 at 8:35 AM, Greg Lindahl <[email protected]> wrote:
> On Tue, Jan 20, 2009 at 08:14:35AM +0100, Jon Aquilina wrote: > > > in all honesty is there a need really to replace the cluster. why not > just > > add onto it? > > Think about it: if you pay 1/3 the cost of a new node per year in rent > and utilities, and nodes get twice as fast for the same cost every 18 > months. Let's say that means each year performance increases by 60% > (close enough for our purposes.) > > Year 1: I pay 1.33$ for 1 unit of performance > Year 2: I pay 0.33$ for 1 unit of performance -- or 1.33$ for 1.6 units of > performance > Year 3: I pay 0.33$ for 1 unit of performance -- or 1.33$ for 2.56 units of > performance > Year 4: I pay 0.33$ for 1 unit of performance -- or 1.33$ for 4.1 units of > performance > > Hey! In year 4 it's about the same to keep the old cluster, or throw > it out and buy a new one. (If I want to spend the same $$, I can buy a > cluster 1/4 the size, but same performance, as the original one.) > > And in year 5, it's a big win to buy the new stuff. > > If you don't pay rent and utilities, then sure, you'll probably keep > as much junk as will fit in whatever space you have. Maybe the cluster > I put together in 1998 at UVa is still running... > > -- greg > > > > -- Jonathan Aquilina
_______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
