Since we moved to Palo Alto I've had the luxury of walking to work every day. Usually that's where I do my deep thinking. By the time I cruise by the Whole Foods it's really easy to ignore the activist-of-the-day petitioning something about global warming. But yesterday was different.
My walks to and from work were pretty normal. When I got home I decided to clean up a bit around the house, was doing the dishes, and had an odd moment of clarity. I threw down the sponge and ran over to my laptop to jot this down.
Usually I'm at a loss for analogy when explaining how concurrency works to a developer who has never had to deal with it before. So I throw out all kinds of highly technical terms and their eyes glaze over. But you know, it's actually really simple.

If you want the technical description, I leave that as an excercise to the reader. Here's a Wikipedia article. And another over at Microsoft that's specific to database concurrency. See, told ya it's like doing the dishes.
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