At 03:10 AM -0400 06/19/2005, [EMAIL PROTECTED] wrote:
What is it that makes a server a server?
Any computer, with a little work, can be made into a great "home"
server. That's kindof like hauling lumber sticking out of an SUV.
Good enough if you're going to build a swing-set. Insufficient for
building an apartment building.
Real servers are sturdy things, built with:
Higher quality components with redundancies, to reduce failures.
Bigger or no power supply (standalone vs rack-mount).
Terrible cooling systems - they often depend on the forced-air blast
thru the rack to provide cooling. ...One comparison I recently saw
pointed out that a rack full of 1 GHz blade servers puts out the same
amount of heat as a kitchen oven, open, set to 500 degrees F.
Fast(er) i/o buses and interfaces to support lots of high-speed devices.
Hard drives are typically high-end SCSI (up to 2.5 Gbps) or
FiberChannel (4 to 16 Gbps) or SAS (3 to 12 Gbps). They're faster
and have a longer MTTF than IDE devices. HDs are often configured as
very large RAID arrays. ...One of my clients is currently worried
that his 4 PB array is too small. He's considering doubling its size
now instead of early next year.
The operating system is specifically tuned to crunch data or move
bits in and out faster (depends on server type), often at the expense
of any interactive GUI response.
And, of course, it's loaded with the server type softwares instead of
the client versions. oiy! The cost of server software licenses!
- Dan.
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