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From Feng AtWork <>
Subject Which Persistence Adapter to Use for Shared File System Master/Slave
Date Mon, 05 Apr 2010 07:36:08 GMT
Hi, There,

I have been evaluating ActiveMQ for our new project for the past few weeks,
and I cannot find a conclusive answer about exactly which persistence
adapters can be used with a shared file system master/slave set up.

There seems to be some conflicting information out there, for example:

1) according to Bruce Snyder in this thread,,
it seems journaledJBDC can only be used with shared JDBC master/slave,

but 2) the example in shows to use
just the journaledJDBC adapter with shared file system master/slave;

and 3), according to the same thread in 1), AMQ persistence should be used
with shared file system master/slave.

And what about  kahaPersistenceAdapter, it is file based, but the above
thread mentions, which
uses zookeeper and is not supported.

Finally, what is the different between kahaPersistenceAdapter in
<kahaPersistenceAdapter dir="target/kaha-data"/> and just kaha in <kahaDB
directory="activemq-data" journalMaxFileLength="32mb"/>.   Are
kahaPersistenceAdater and kahaDB the same thing?   If kahaPersistenceAdapter
cannot be used with shared file system JDBC, can kahaDB be used instead?

Any clarification will be much appreciated.  We load tested journaledJDBC
with default derby data source and an Oracle data source, the performance
were not satisfactory.



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