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Re: Re: STOP Trading Memory for Speed

by PetaMem (Priest)
on Oct 03, 2002 at 08:00 UTC ( #202456=note: print w/replies, xml ) Need Help??

in reply to Re: STOP Trading Memory for Speed
in thread STOP Trading Memory for Speed

Oh - come on Abigail,

64bits from Sun @ $1000. You're joking. Not even the recent 32bit linux systems from Sun cost less than 1500,- US$ with 256MB RAM. They're PC's with the Sun label.

And I say "big iron", because the memory overhead in perl is much worse for 64bit architectures than it is for 32bit, so to get everything to memory you get on a 32bit/4GB config, you need an up to 64bit/12GB configuration. YES factor of 3. So to double your capacity with the help of 64bit, you need to buy BIG iron with at least 24GB. Try it. And try to get this for something less than 50.000US$

But I'm happy, that most of the replies (and current considerations for 5.10) give more focus to this problem. So the most realistic scenario for us will be, that solutions for this problem will come from 3 directions:

  • We are designing the architecture of the application partitionable, so it can be distributed over n nodes of a cluster.
  • Some work on the perl side will surely be done to lower Perls memory overhead (thanks for the use less pragma pointer).
  • maybe in 3-5 years we'll really have 64bit with xx GB for a few bucks and will build clusters with these.
If all that is going to work out that way, I'll be a happy man. :-)


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Re: STOP Trading Memory for Speed
by Abigail-II (Bishop) on Oct 03, 2002 at 08:47 UTC
      You are really good at joking. This "thing" offers MAX 2GB RAM (what were we talking about?), has 128MB and a 500MHz CPU and a 20GB HD.

      So I looked at the relevant configs:

      cheapest Sun Blade 2000. It can have up to 8GB of RAM: $10.995,00 But 8GB are not available, as there are only 512MB sticks and 8 slots. Given very optimistic prices, one would have to pay around $17.000,00 to get 8GB

      (we paid $7000,- for our 3GB dual-P3 with 100GB RAID)

      Ok. Let's look a little bit further:

      The smallest reasonable config would be a Sun Fire V480 Entry-Level Server. With 16GB RAM it costs: $46.995,-

      Big Iron for us...


        Abigail's point is that 64-bits needn't cost that much and isn't big iron. So Abigail points to a low-cost 64-bit piece of hardware with pathetic specs. No joke. It is a 64-bit CPU and isn't big iron. 64-bit has to do with how the CPU works and not anything else.

        An even better example is the Nintendo-64. The 64 in this piece of outmoded hardware is the fact that it is a 64-bit computer. It isn't big iron, it is cheaper than the Sun, and they don't even sell computers that pathetic any more. Also your playstation is a 128-bit computer, and many video cards are 256-bit. Yet neither qualifies as super-big iron. Video happens to a problem where wider words are good.

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