Metadata-Version: 1.1
Name: mrjob
Version: 0.3.3.2
Summary: Python MapReduce framework
Home-page: http://github.com/Yelp/mrjob
Author: David Marin
Author-email: dave@yelp.com
License: Apache
Description: mrjob
        =====
        
        .. image:: http://github.com/yelp/mrjob/raw/master/docs/logos/logo_medium.png
        
        mrjob is a Python 2.5+ package that helps you write and run Hadoop Streaming
        jobs.
        
        `Main documentation <http://packages.python.org/mrjob/>`_
        
        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.
        
        Installation
        ------------
        
        From PyPI:
        
        ``pip install mrjob``
        
        From source:
        
        ``python setup.py install``
        
        
        A Simple Map Reduce Job
        -----------------------
        
        Code for this example and more live in ``mrjob/examples``.
        
        ::
        
           """The classic MapReduce job: count the frequency of words. 
           """
           from mrjob.job import MRJob
           import re
        
           WORD_RE = re.compile(r"[\w']+")
        
        
           class MRWordFreqCount(MRJob):
        
               def mapper(self, _, line):
                   for word in WORD_RE.findall(line):
                       yield (word.lower(), 1)
        
               def combiner(self, word, counts):
                   yield (word, sum(counts))
        
               def reducer(self, word, counts):
                   yield (word, sum(counts))
        
        
            if __name__ == '__main__':
                MRWordFreqCount.run()
        
        Try It Out!
        -----------
        
        ::
        
            # locally
            python mrjob/examples/mr_word_freq_count.py README.rst > counts
            # on EMR
            python mrjob/examples/mr_word_freq_count.py README.rst -r emr > counts
            # on your Hadoop cluster
            python mrjob/examples/mr_word_freq_count.py README.rst -r hadoop > counts
        
        Setting up EMR on Amazon
        ------------------------
        
        * create an `Amazon Web Services account <http://aws.amazon.com/>`_
        * sign up for `Elastic MapReduce <http://aws.amazon.com/elasticmapreduce/>`_
        * Get your access and secret keys (click "Security Credentials" on
          `your account page <http://aws.amazon.com/account/>`_)
        * Set the environment variables ``$AWS_ACCESS_KEY_ID`` and
          ``$AWS_SECRET_ACCESS_KEY`` accordingly
        
        Advanced Configuration
        ----------------------
        
        To run in other AWS regions, upload your source tree, run ``make``, and use 
        other advanced mrjob features, you'll need to set up ``mrjob.conf``. mrjob looks 
        for its conf file in:
        
        * The contents of ``$MRJOB_CONF``
        * ``~/.mrjob.conf``
        * ``/etc/mrjob.conf``
        
        See `the mrjob.conf documentation
        <http://packages.python.org/mrjob/configs-conf.html>`_ for more information.
        
        
        Links
        -----
        
        * source: <http://github.com/Yelp/mrjob>
        * documentation: <http://packages.python.org/mrjob/>
        * discussion group: <http://groups.google.com/group/mrjob>
        * Hadoop MapReduce: <http://hadoop.apache.org/mapreduce/>
        * Elastic MapReduce: <http://aws.amazon.com/documentation/elasticmapreduce/>
        * PyCon 2011 mrjob overview: <http://blip.tv/pycon-us-videos-2009-2010-2011/pycon-2011-mrjob-distributed-computing-for-everyone-4898987/>
        
        Thanks to `Greg Killion <mailto:greg@blind-works.net>`_
        (`blind-works.net <http://www.blind-works.net/>`_) for the logo.
        
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.5
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Topic :: System :: Distributed Computing
Provides: mrjob
