activemq

History

Timothy A. Bish 334ade2f5d Some updates and changes to support some work on https://issues.apache.org/jira/browse/AMQ-3467 Enhance the ListIndex to improve performance of the remove and put operations, put is now a real put and will update the element with the given key if it exists in the list, otherwise it will add it to the end. Also adds the ability for a single key/value pair to span more than one page when needed, multiple elements will still reside on one page whenever possible. git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1170849 13f79535-47bb-0310-9956-ffa450edef68		2011-09-14 21:15:39 +00:00
..
src	Some updates and changes to support some work on https://issues.apache.org/jira/browse/AMQ-3467	2011-09-14 21:15:39 +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	[maven-release-plugin] prepare for next development iteration	2011-03-28 18:02:03 +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.