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Re^6: CPU cycles DO NOT MATTER!

by Joost (Canon)
on Apr 19, 2008 at 22:33 UTC ( #681718=note: print w/replies, xml ) Need Help??

in reply to Re^5: CPU cycles DO NOT MATTER!
in thread CPU cycles DO NOT MATTER!

It's the blanket statement I object to most.
Yes the title is a bit confrontational. And wrong :-) But I assume that was deliberate.

The gist of it is right, though: people spend way too much time optimizing stuff for hours that doesn't make even a minute of difference a year.

Followed by the idea that the short term hardware fix is economic in the long term.
That depends. But the OP might consider that once hardware is bought, it's not generally upgraded every year and a half to take advantage of Moor's law (even if that would be economical by itself), and that many servers these days are placed in rented spaces, which means you pay for the size of your server farm and its power consumption each month, not just once.

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Re^7: CPU cycles DO NOT MATTER!
by dragonchild (Archbishop) on Apr 19, 2008 at 22:38 UTC
    I factored that into my TCO. The actual cost for a decent server nowadays is about $4000. The other $6000 is the money spent on that server over 2 years. I'm assuming a sysadmin at $100k/year maintaining 50 servers, so that adds $4000. The other $2000 is power, rackspace, and other incidentals. That comes out to, roughly, $85/month which is rather high. I'm also assuming all free software (Linux, Apache, Pg/MySQL, etc).

    Does that work out better?

    My criteria for good software:
    1. Does it work?
    2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?
      Seems reasonably fair. But to compare:

      On this (hypothetical - but close enough to the truth) project we've got about $100,000 in hardware and about $20,000 a year in hosting. This is one fairly large rack of machines. Assuming we'd have to double the amount of raw CPU power, that would probably go add at least another $40,000 hardware and something like $10,000 - $20,000 / year in hosting costs depending on how large the racks are. One man/month would cost roughly $15,000, probably a bit less. You can see there's some room here. :-)

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