[Beowulf] RE: Capitalization Rates - How often should you replace a cluster? (resent - 1st sending wasn't posted ).

richard.walsh at comcast.net richard.walsh at comcast.net
Tue Jan 20 16:25:12 PST 2009

----- Original Message ----- 
From: "Greg Lindahl" <lindahl at pbm.com> 

>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. 

While Greg's analysis makes sense, one should probably note that 

transistor-count-driven performance improvement assumptions yield 

smaller practical benefits today where bandwidth continues to lag and 

parallel performance improvement is not automatic.  A gain in throughput 

performance is guaranteed by the Moore's Law doubling in the multicore 

era if your  workflow is throughput oriented. 



Beowulf mailing list, Beowulf at beowulf.org 
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.beowulf.org/pipermail/beowulf/attachments/20090121/3fc567f7/attachment.html>

More information about the Beowulf mailing list