David Pick's talk at the conj is about Kafka, which is a distributed messaging system. It implements a publish/subscribe model and runs in a cluster. Its documentation claims that Kafka has very high throughput.
Why it matters
Braintree, where David Pick works, is a huge payment processor, now owned by PayPal. They must have very strict availability and consistency requirements in addition to the scale. The talk description hints that Clojure was helpful to their success. Some of the best talks I've seen are this kind of experience report.
About David Pick
This post is one of a series called Pre-conj Prep.
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Clojure/conj is a conference organized and hosted by Cognitect. This information is in no way official. It is not sponsored by nor affiliated with Clojure/conj or Cognitect. It is simply me curating and organizing public information about the conference.