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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hbase/ZookeeperIntegration" by JeanDanielCryans
Date Wed, 25 Jun 2008 17:35:44 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 JeanDanielCryans:
http://wiki.apache.org/hadoop/Hbase/ZookeeperIntegration

------------------------------------------------------------------------------
  = HBase/Zookeeper Integration Documentation =
+ 
+ == Introduction ==
+ 
+ Yahoo! Zookeeper is for HBase what Chubby is for Bigtable. The goal of using ZK is that
a coordination manager is useful to decentralize the master's job and it improves availability.
In Bigtable's paper, Chubby is used to :
+ 
+  * Ensure there is at most 1 active master at any time
+  * Store the bootstrap location
+  * Discover tablet servers and finalize tablet server death
+  * Store the schema information
+  * Store access control lists
+ 
+ It has been discussed that, for the moment, only the three first bullets will be implemented.
Also, in order to have a lesser impact on current users, ZK will be optional and a basic implementation
will be provided in HBase. For those that will use ZK, the overhead will be like using HDFS.
+ 
+ For updates, see [https://issues.apache.org/jira/browse/HBASE-546 HBASE-546]
+ 
+ == The Interface ==
  
  Soon...
  
+ 
+ == The HBase Implementation ==
+ 
+ Soon...
+ 
+ 
+ == The ZK Integration ==
+ 
+ Not so soon...
+ 

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