mrjob v0.3.0 released

[Jimmy Retzlaff]

What is mrjob?
-----------------------
mrjob is a Python package that helps you write and run Hadoop Streaming
jobs.

mrjob fully supports Amazon's Elastic MapReduce (EMR) service, which allows
you to buy time on a Hadoop cluster on an hourly basis. It also works with
your own Hadoop cluster.

Some important features:

 * Run jobs on EMR, your own Hadoop cluster, or locally (for testing).
 * Write multi-step jobs (one map-reduce step feeds into the next)
 * Duplicate your production environment inside Hadoop
   * Upload your source tree and put it in your job's $PYTHONPATH
   * Run make and other setup scripts
   * Set environment variables (e.g. $TZ)
   * Easily install python packages from tarballs (EMR only)
   * Setup handled transparently by mrjob.conf config file
 * Automatically interpret error logs from EMR
 * SSH tunnel to hadoop job tracker on EMR
 * Minimal setup
   * To run on EMR, set $AWS_ACCESS_KEY_ID and $AWS_SECRET_ACCESS_KEY
   * To run on your Hadoop cluster, install simplejson and make sure
$HADOOP_HOME is set.

More info:

 * Install mrjob: pip install mrjob -OR- easy_install mrjob
 * Documentation: http://packages.python.org/mrjob/
 * PyPI: http://pypi.python.org/pypi/mrjob
 * Mailing list: http://groups.google.com/group/mrjob
 * Development is hosted at github: http://github.com/Yelp/mrjob

What's new?
--------------------
mrjob v0.3.0 is a major new release. Full details are at
http://packages.python.org/mrjob/whats-new.html - here are a few highlights:

v0.3.0, 2011-12-07
 * Combiners
 * *_init() and *_final() for mappers, reducers, and combiners
 * Custom option parsers
 * Job flow pooling on EMR (saves time and money!)
 * SSH log fetching
 * New EMR diagnostic tools

A big thanks to the contributors to this release: Steve Johnson, Dave
Marin, Wahbeh Qardaji, Derek Wilson, Jordan Andersen, and Benjamin
Goldenberg!
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