activemq

History

Hiram R. Chirino d761e80ae4 - added some handy generic visitors to the BTreeVisitor class. - Updated the recovery process so it now rollsback changes applied to the index which did not get synced to the journal. git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@741659 13f79535-47bb-0310-9956-ffa450edef68		2009-02-06 18:19:31 +00:00
..
src	- added some handy generic visitors to the BTreeVisitor class.	2009-02-06 18:19:31 +00:00
README	Moving the kahadb work from the sandbox into trunk now that 5.2 has been released.	2008-11-21 18:19:50 +00:00
pom.xml	applied patch from https://issues.apache.org/activemq/browse/AMQ-2068 with thanks	2009-01-16 11:47:02 +00:00

README

=======================================================================
 KahaDB : An Embedded Lightweight Non-Relational Database
=======================================================================

Goals:
  * Provide a simple collections based interface for storing persistent
    data.
  * Provide a lower level key value interface for storing data. Secondary
    keys should be supported.
  * Fast recovery

Status:
  * Moved the org.apache.activemq.kaha package into this module
    and renamed it as org.apache.kahadb
  * Moved a refactored version of the low level indexing logic
    used by Apache xindice to the org.apache.kahadb.xindice page.
  
TODO:
  * None of our current index support fast recovery.  They suffer
    from partial page write failures so on a crash, they have
    to be fully rebuilt from the data logs.
  * Indexes should know what the last transaction id that updated
    it, so that missing operations can be replayed. 
  * Investigate implementing data log replication for HA.