activemq

History

Hiram R. Chirino 76d3b4665c - Journal will now check the data files for data corruption if checkForCorruptionOnStartup option is enabled. - The corrupted journal records can be inspected via DataFile.getCorruptedBlocks() - An OR and AND BTreeVisitor is now supported to support running more complex queries against the BTree git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@805550 13f79535-47bb-0310-9956-ffa450edef68		2009-08-18 19:44:22 +00:00
..
src	- Journal will now check the data files for data corruption if checkForCorruptionOnStartup option is enabled.	2009-08-18 19:44:22 +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.