activemq

History

Gary Tully 76f842d371 improve async task concurrency, contention over indexMutex for transactions and taskMap, not per destination. Added some metrics enabled by system properties to help further diagnosis of journal usage git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@960060 13f79535-47bb-0310-9956-ffa450edef68		2010-07-02 17:11:00 +00:00
..
src	improve async task concurrency, contention over indexMutex for transactions and taskMap, not per destination. Added some metrics enabled by system properties to help further diagnosis of journal usage	2010-07-02 17:11:00 +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	AMQ-2602: avoid activemq osgi bundles to import their own packages	2010-02-11 09:57:46 +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.