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Kaha Persistence

Kaha Persistence​

Kaha Peristence is a storage solution written especially for message persistence and is part of the ActiveMQ project. It's tuned to provide optimal performance for typical message usage patterns, which involves writing/reading and discarding messages that are persisted very quickly.

Data stored in Kaha is appended to data logs - the log files are discarded once there is no longer interest in the data contained in the log.

Configuring Kaha Persistence​

In the broker XML specify the persistence adaptor to be Kaha e.g.

ActiveMQ 5.0 and above:

<broker brokerName="broker" persistent="true" useShutdownHook="false">
  <transportConnectors>
    <transportConnector uri="tcp://localhost:61616"/>
  </transportConnectors>
  <persistenceAdapter>
    <kahaPersistenceAdapter directory="activemq-data" maxDataFileLength="33554432"/>
  </persistenceAdapter>
</broker>

ActiveMQ 4.1 and earlier:

<broker brokerName="broker" persistent="true" useShutdownHook="false">
  <transportConnectors>
    <transportConnector uri="tcp://localhost:61616"/>
  </transportConnectors>
  <persistenceAdapter>
    <kahaPersistenceAdapter dir="activemq-data" maxDataFileLength="33554432"/>
  </persistenceAdapter>
</broker>