Chapter 9Wrapping Up

Congratulations on making it through all seven weeks!

We’ve covered a great deal of ground, from the fine-grained parallelism supported by a data-parallel GPU to the massive scale of a MapReduce cluster. Along the way, we’ve seen not only how concurrency and parallelism allow us to exploit the power of modern multicore CPUs, but also many other benefits of moving beyond conventional, sequential code:

  • We saw how Elixir, Hadoop, and Storm all distribute computation across a cluster of independent machines, allowing us to create solutions that can recover when hardware fails.

  • When looking at core.async, we saw how concurrency could rescue us from the “callback hell” commonly associated with event handling.

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