RE: Why 4 Procs

  • From: "John Tolmachoff \(Lists\)" <johnlist@xxxxxxxxxxxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 27 Jan 2005 13:05:41 -0800

Both of the Exchange servers I manage for clients are 2 process models with
Hyper Threading. Both run great.


John Tolmachoff


eServices For You


-----Original Message-----
From: C Drawers [mailto:cdrawers@xxxxxxxxx] 
Sent: Thursday, January 27, 2005 12:46 PM
To: [ExchangeList]
Subject: [exchangelist] Why 4 Procs 


4 Processor servers seem to always been chosen for mailbox servers.  Since a
comparable equipped 2 processor server is often 1/4 the cost and it seems
the latest 2 proc box has equivilant ghz power as a 4 proc box, it sure
seems like 2 proc boxes are the way to go. 


Can someone help me with this?  I'm wondering if there is something magic
about 4 proc.  I've seen in the Exch2k3 performance white paper something to
the affect of "Exchange scales well to 4 procs", but I don't see anything
definitive or at least something worth buying a 25k (4 proc) server as
opposed to a 6k (2 proc) server. 


Any crazy theories or even better... concrete theories with data to suppor
the theory? 





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