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From Josh Patterson <j...@cloudera.com>
Subject Re: Enabling LZO compression of map outputs in Cloudera Hadoop 0.20.1
Date Thu, 05 Aug 2010 22:59:34 GMT

We're working hard to make compression easier, the biggest hurdle
currently is the licensing issues around the LZO codec libs (GPL,
which is not compatible with ASF bsd-style license).

Outside of making the changes to the mapred-site.xml file, with your
setup would do you view as the biggest pain point?

Josh Patterson

On Thu, Aug 5, 2010 at 6:52 PM, Bobby Dennett
<bdennett+software@gmail.com> wrote:
> We are looking to enable LZO compression of the map outputs on our
> Cloudera 0.20.1 cluster. It seems there are various sets of
> instructions available and I am curious what your thoughts are
> regarding which one would be best for our Hadoop distribution and OS
> (Ubuntu 8.04 64-bit). In particular, hadoop-gpl-compression
> (http://code.google.com/p/hadoop-gpl-compression) vs. hadoop-lzo
> (http://github.com/kevinweil/hadoop-lzo).
> Some of what appear to be the better instructions/guides out there:
> * Josh Patterson's reply on June 25th to the "Newbie to HDFS
> compression" thread --
> http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201006.mbox/%3CAANLkTileo-q8USEiP8Y3Na9pDYHlyUFIPpR0In0LkpJm@mail.gmail.com%3E
> * hadoop-gpl-compression FAQ --
> http://code.google.com/p/hadoop-gpl-compression/wiki/FAQ
> * "Hadoop at Twitter (part 1): Splittable LZO Compression" blog post
> -- http://www.cloudera.com/blog/2009/11/hadoop-at-twitter-part-1-splittable-lzo-compression/
> Thanks in advance,
> -Bobby

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