Re: maximum possible memory limit ..

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On Thu, 24 Apr 2003 20:05:24 +0200, Henti Smith <[e-mail]>  said:
> I had a discussion with somebody watching the whole M$ server launch and
> mentioned then new systems supports up to a terabyte of ram. 

Well.. sure.. it's easy enough to write something that supports plugging in
a terabyte.  The *tricky* part is supporting it well - you have page table
issues, you have swapping/thrashing issues (if you *do* have to page something
out, you're in trouble.. ;), you have process scheduling issues (how many
Apache processes does it take to use up a terabyte?  What's your load average
at that point?), you have multi-processor scaling issues (you're gonna want
to have 64+ processors, etc..)

Consider - the number of machines with over a terabyte of RAM is limited:

http://www.llnl.gov/asci/platforms/platforms.html

That's the sort of box that has a terabyte.  Do you *really* think that
M$ 2003 has all the stuff needed to scale to THAT size?

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