On 2/22/07, spiderman2 <[EMAIL PROTECTED]> wrote:

I'm looking into clustered HA deployments with zero message loss under one
point-of-failure.

My best options seem to be:
  A) Network of Brokers with fast journaling and jdbc persistance

Networks of brokers are for store and forward, not for HA of messages.
i.e. a message only exists on one broker in a network at any point in
time - its never HA across brokers


  B) JDBC Master Slave

Yes - the 3 master/slave alternatives are what you need
http://activemq.apache.org/masterslave.html


BUT, what if broker dies before it writes its batch to the database, but
after it completes its fast-journal?

It depends which of the 3 master/slave alternatives you are using -
but with JDBC Master/Slave you don't use the journal


--

James
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http://radio.weblogs.com/0112098/

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