Slides from my lightning talk on Cascalog at the 4th Hadoop Users Group UK meeting, 3rd June 2010

1. Cascalog
A Clojure-based query language for Hadoop
Gavin Heavyside (@_hgavin)
HUGUK June 2010

2. Cascalog
• Clojure based
• Inspired by Datalog
• Uses Cascading to run MapReduce jobs
• By Nathan Marz of Backtype

3. Features
• Functions, Filters, Aggregators
• Joins, Combiners, Sorting
• Cascading “Taps” to query HDFS/Files etc
• Cascading interop
• Full power of Clojure

4. Demo
• Fingers Crossed

5. Find out more
• http://nathanmarz.com/blog
• http://github.com/nathanmarz/cascalog
• cascalog-user Google group
• @nathanmarz