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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "ZooKeeper/PoweredBy" by StuHood
Date Tue, 09 Jun 2009 15:19:27 GMT
Dear Wiki user,

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

The following page has been changed by StuHood:
http://wiki.apache.org/hadoop/ZooKeeper/PoweredBy

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   * [http://hadoop.apache.org/hbase/ HBase] - HBase is the Hadoop database. Its an open-source,
distributed, column-oriented store modeled after the Google paper, Bigtable: A Distributed
Storage System for Structured Data by Chang et al.
     We use ZooKeeper for master election, server lease management, bootstrapping, and coordination
between servers.
  
+  * [http://www.rackspace.com/email_hosting Rackspace] - The Email & Apps team uses ZooKeeper
to coordinate sharding and responsible changes in a distributed e-mail client that pulls and
indexes data for search. ZooKeeper also provides distributed locking for connections to prevent
a cluster from overwhelming servers.
+ 

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