Irrational Exuberance!

Replicating receive-after in an Erlang gen_server

December 13, 2009 Very brief post on how to reproduce the behavior of receive-after in an Erlang gen_server. Useful for recurring tasks.

Durable Writes & Consistent Reads

November 30, 2009 In this second part in the "Hands On Review of the Dynamo Paper" we take a look at only acknowledging update to user after it has been written to multiple stores, and comparing read values from multiple sources to ensure consistent reads.

Hands On Review of the Dynamo Paper

November 30, 2009 Instead of just listing off the myriad interesting ideas in the Amazon Dynamo paper, I decided it would be more interesting for both myself and readers to actually walk through implementing a distributed key-value store and incrementally evolve it using the ideas introduced in the Amazon Dynamo paper.

Recurring Events and Message Passing

November 25, 2009 This article looks at a couple of approaches for implementing systems with recurring events using message-passing based concurrency (Erlang and Clojure are used in code snippets). In particular it looks at the ping-pong, circle, coordinator and gossip approaches to distributed communication.

Scalable Scraping in Clojure

November 24, 2009 A fairly indepth tutorial which takes a look at using Clojure to extract data from webpages, using agents to process data, and a few other knickknacks.