activemq

History

Gary Tully 9e40b914de resolve https://issues.apache.org/jira/browse/AMQ-3122 - ignore zero length journal files on start, sync write state on shutdown to ensure metadata is not ahead of journal in the event of no space on disk and journal write failure git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1056327 13f79535-47bb-0310-9956-ffa450edef68		2011-01-07 14:12:46 +00:00
..
src	resolve https://issues.apache.org/jira/browse/AMQ-3122 - ignore zero length journal files on start, sync write state on shutdown to ensure metadata is not ahead of journal in the event of no space on disk and journal write failure	2011-01-07 14:12:46 +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	2010-11-26 10:01:45 +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.