September 2013
Intermediate to advanced
548 pages
12h 25m
English
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Groups of Processes That All Die Together
Often you’ll want to create groups of processes that all die together. This is a very useful invariant for arguing about the behavior of a system. When processes collaborate to solve a problem and something goes wrong, we can sometimes recover, but if we can’t recover, we just want to stop everything we were doing. This is rather like the notion of a transaction: either the processes do what they were supposed to do or they are all killed.
Assume we have some linked processes and that one of the linked
processes dies. For example, see P9 in the following
figure. The left side of the figure shows how the
processes are linked before P9 dies. The
right side shows which process are still alive after
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.