1 Million users.. I can't Scale!!
jeffrey.schwab at rcn.com
Thu Sep 29 03:58:15 CEST 2005
skip at pobox.com wrote:
> Jeff> How many are more than "a few?"
> I don't know. What can you do today in commercial stuff, 16 processors?
> How many cores per die, two? Four? We're still talking < 100 processors
> with access to the same chunk of memory. For the OP's problem that's still
> 10,000 users per processor. Maybe that's small enough, but if not, he'll
> need multiple processes across machines that don't share memory.
Sure, multiple machines are probably the right approach for the OP; I
didn't mean to disagree with that. I just don't think they are "the
only practical way for a multi-process application to scale beyond a few
processors," like you said. For many (most?) applications in need of
serious scalability, multi-processor servers are preferable. IBM has
eServers available with up to 64 processors each, and Sun sells E25Ks
with 72 processors apiece. I like to work on those sorts of machine
when possible. Of course, they're not right for every application,
especially since they're so expensive.
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