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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "PseudoDistributedHadoop" by SteveLoughran
Date Mon, 05 Mar 2012 11:56:01 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "PseudoDistributedHadoop" page has been changed by SteveLoughran:
http://wiki.apache.org/hadoop/PseudoDistributedHadoop?action=diff&rev1=4&rev2=5

- Pseudo Distributed Hadoop is where Hadoop runs as set of independent JVMs, but only on a
single host, listening only on the "localhost" ports.
+ Pseudo Distributed Hadoop is where Hadoop runs as set of independent JVMs, but only on a
single host. It has much lower performance than a real Hadoop cluster, due to the smaller
number of hard disks limiting IO bandwidth. It is, however, a good way to play with new MR
algorithms on very small datasets, and to learn how to use Hadoop. Developers working in the
Hadoop codebase usually test their code in this mode before deploying their build of Hadoop
to a local test cluster.
  
  If you are running in this mode (and don't have a proxy server fielding HTML requests),
and have not changed the default port values, then both the NameNode and JobTracker can be
reached from this page
  

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