Before you start espousing the inferiority of Exchange, I suggest you learn something about it. We're talking 50GB of user mail, but when you take into account Single Instance Storage (stores one copy of a message per server), that usually cuts the database size in half, or 25GB.
I would regularly spec out just one server for that: dual processores and 1GB of RAM, and a well organzied disk subsystem. And at that, the 15 or so of those that I have running average 10% cpu utilization.
Since you don't want anecdotal facts - which I understand - take a look at a few published benchmarks:
The numbers, in all cases, in this article are horribly skewed to benefit the Linix community.
Let's also not get into the fact that Exchange per seat licensing at 5000 seats is more like $30USD than the $50 used for comparison. And it could all be managed (from a server perspective) by 1 senior admin type. Here are some more realistic numbers for TCO on Exchange:
Intel Servers (1 x $8K) $ 8,000
NT Licenses (1 x $600) $ 600
Exchange (5,000 mailboxes x $35 per seat) $ 175,000
Communication racks (1 x $2.1K) $ 2,100
Networking (2 x $3K) $ 6,000
Facilities ($18 sq. ft/mo. x 104 sq. ft) $ 67,392
Electricity ($.85 per day per server) $ 10,098
Uninterruptible Power Supply (UPS) $ 135,000
Support (1 @ $65K x 1.5 for benefits) $ 97,000
Three-year TCO $ 501,190
And in all fairness, one could chop out the $135k for a UPS and run the box off a $2000 APC unit.
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Before you start espousing the inferiority of Exchange, I suggest you learn something about it. We're talking 50GB of user mail, but when you take into account Single Instance Storage (stores one copy of a message per server), that usually cuts the database size in half, or 25GB.
e nd er/1,1027,5206-6-100-225-1,00.htm
n ce /x232_exchange_5800_aug01.pdf
I would regularly spec out just one server for that: dual processores and 1GB of RAM, and a well organzied disk subsystem. And at that, the 15 or so of those that I have running average 10% cpu utilization.
Since you don't want anecdotal facts - which I understand - take a look at a few published benchmarks:
http://activeanswers.compaq.com/ActiveAnswers/R
ftp://ftp.pc.ibm.com/pub/special/serverperforma
The numbers, in all cases, in this article are horribly skewed to benefit the Linix community.
Let's also not get into the fact that Exchange per seat licensing at 5000 seats is more like $30USD than the $50 used for comparison. And it could all be managed (from a server perspective) by 1 senior admin type. Here are some more realistic numbers for TCO on Exchange:
Intel Servers (1 x $8K) $ 8,000
NT Licenses (1 x $600) $ 600
Exchange (5,000 mailboxes x $35 per seat) $ 175,000
Communication racks (1 x $2.1K) $ 2,100
Networking (2 x $3K) $ 6,000
Facilities ($18 sq. ft/mo. x 104 sq. ft) $ 67,392
Electricity ($.85 per day per server) $ 10,098
Uninterruptible Power Supply (UPS) $ 135,000
Support (1 @ $65K x 1.5 for benefits) $ 97,000
Three-year TCO $ 501,190
And in all fairness, one could chop out the $135k for a UPS and run the box off a $2000 APC unit.