[Hadoop Wiki] Trivial Update of "Hbase/DesignOverview" by EvgenyRyabitskiy

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The following page has been changed by EvgenyRyabitskiy:
http://wiki.apache.org/hadoop/Hbase/DesignOverview

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+ '''This page was created on 06.03.09 and now is in progress of construction....'''
+ 
  = Table of Contents =
  
   * [#intro Introduction]
@@ -16, +18 @@

  
  This paper is HBase oriented analogue of Google [http://labs.google.com/papers/bigtable.html Bigtable paper]. This paper will be self-sufficient. 
  
- '''This page was created on 06.03.09 and now is in progress....'''
- 
- HBase is an [http://apache.org/ Apache] open source project whose goal is to provide Bigtable-like storage for the Hadoop Distributed Computing Environment. HBase leverages the distributed data storage provided by the [http://hadoop.apache.org/core/docs/current/hdfs_design.html Hadoop Distributed File System (HDFS)].
+ HBase is an [http://apache.org/ Apache] open source project whose goal is to provide Bigtable-like storage for the Hadoop Distributed Computing Environment. HBase leverages the distributed data storage provided by the [http://hadoop.apache.org/core/docs/current/hdfs_design.html Hadoop Distributed File System (HDFS)] and use [http://hadoop.apache.org/zookeeper/docs/current/zookeeperOver.html ZooKeeper] for coordination between HBase nodes.
  
  Data is logically organized into tables, rows and columns.  An iterator-like interface is available for scanning through a row range and, of course, there is the ability to retrieve a column value for a specific row key. Any particular column may have multiple versions for the same row key.