I have a Slashdot widget on my iGoogle home page. Along with most of the other widgets on there, except Google Reader, I don't often pay it much attention, but today it displayed a tantalising headline: Extreme Memory Oversubscription For VMs. Having worked on VME for many years, I still retain an amused, distant interest in the activities of today's virtual machine enthusiasts. Here's a quote from the article...
"Their method is based on a combination of lightweight VM cloning (sort of like fork() for VMs) and on-demand paging. Seems like the 'other half' of resource oversubscription for VMs might finally be here."
Good grief. On-demand paging! Imagine that. Something we were doing in the mainframe world at the end of the 1960s. Next they'll be telling me they've invented a subsystem called Virtual Store Manager.
That's the trouble with the computing industry today. It's staffed with twenty-somethings fresh from college who like to think they're original thinkers and have no concept of, or interest in, history (or reinvention of the wheel). Even if they could be bothered to read up how we did it on mainframes they would probably not think it relevant (as a commenter on the article points out). Sad, really. The truth is high-end PC systems with massive amounts of memory and virtualisation technology look more and more like mainframes every day. They have the same problems, and those problems have the same solutions.
(If you're *really* interested, you can read the original Slashdot story here.)
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