I've just merged a Cascalog pull request of mine [https://github.com/nathanmarz/cascalog/pull/270] that gives Cascalog operations access to the statistics that Cascading generates at the end of each job. I've also added global inc! and inc-by! functions that let you increment custom Hadoop counters from within »

Cascalog 2.0 has been out for over a year now, and outside of a post to the mailing list [https://groups.google.com/d/topic/cascalog-user/F8EkFM7HiE0/discussion] and a talk at Clojure/Conj 2013 [https://www.youtube.com/watch?v%3DuuJW3EaN_3Q] ( slides here [https://speakerdeck.com/sritchie/ »

A little side note before I get started - pivoting from my last post on ski mountaineering racing [http://www.samritchie.io/skimo-racing/] to this post on advanced Cascalog [https://github.com/nathanmarz/cascalog] patterns has made me realize that I'm a full-fledged connoisseur of the esoteric. I'm embracing it! »

A few months ago I announced Midje-Cascalog [http://sritchie.github.com/2011/09/30/testing-cascalog-with-midje.html], my layer of Midje testing macros over the Cascalog MapReduce DSL. These allow you to write tests for your Cascalog jobs in a style that mimics Cascalog's own query execution syntax. In this post »

I've had the pleasure of working with Cascalog [https://github.com/nathanmarz/cascalog] for about ten months now, and have seen the community produce some fantastic work. A number of businesses [https://www.assembla.com/spaces/cascalog/wiki/Who's_using_Cascalog] are using Cascalog in production; I use Cascalog at »

I've been working on a Cascalog testing suite these past few weeks, an extension to Brian Marick's Midje [https://github.com/marick/Midje], that eases much of the pain of testing MapReduce workflows. I think a lot of the dull work we see in the Hadoop community is a direct »

One problem with many existing MapReduce abstraction layers is the utter difficulty of testing queries and workflows. End-to-end tests are maddening to craft in vanilla Hadoop and frustrating at best in Pig and Hive. The difficulty of testing MapReduce workflows makes it scary to change code, and destroys your desire »

Nathan Marz [http://nathanmarz.com/] and I are releasing Cascalog 1.8.1 today! We've added a few interesting features, and I thought I'd provide a bit more detail here for anyone interested. Cross Join cascalog.api now includes support for cross-joins [http://en.wikipedia.org/wiki/Join_(SQL)#Cross_ »