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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "Hbase/HbaseArchitecture" by JimKellerman
Date Thu, 01 Feb 2007 03:47:22 GMT
Dear Wiki user,

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

The following page has been changed by JimKellerman:
http://wiki.apache.org/lucene-hadoop/Hbase/HbaseArchitecture

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    * Scans METADATA table to find all tablets and adds those that have not been assigned
to the set of unassigned tablets
  
  
- = Chubby =
+ = Distributed Lock Server - a ''Chubby'' clone =
  
+  * [:DistributedLockServer:see also Hadoop Distributed Lock Server]
-  * Distributed Lock Service
-  * Provides a namespace of directories and small files
-  * Reads and writes to a file are atomic
-  * Locking
-   * Both directories and files can be used as locks
-  * Chubby client maintains a "session" with a Chubby service, which expires if it is unable
to renew it's session lease with ''SessionTimeout'' seconds.
-  * Chubby client provides consistent caching of Chubby files
   * Uses
    1. To ensure that there is at most one active master at any time
    1. To store bootstrap location of Bigtable data

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