Can somebody outline the various differences between the various Hadoop Distributions available:
using the Apache Hadoop distro as a baseline.
Is there a good reason to using one of these distributions over the standard Apache Hadoop distro?
SquareCog is right on almost all points except: The Yahoo! distribution is what is run on all the production clusters at Yahoo!, not a subset of them. This is more than 25,000 machines in total. The Yahoo! distribution has had the extensive, end-to-end testing necessary to ensure reliable, consistent operation. The other distribution is more liberal about applying patches and so may have more features, but has not been tested as extensively.
