All,
Currently I am looking into this type pf deployment to provide HA application. 
After couple of weeks of investigation I came up with a theory of how the 
deployment model would be. Before I go ahead and go on in my project, I would 
like to get your feedback on that matter (real experiance is far better than 
theories :-) )



- Database
The plan is to use clustred MySQL with x no of nodes (blades)

- AS
Jboss 4.03 + ejb3, running in a clustred deployment on y number of nodes 
(blades)
All the AS are conntectd to the same MySQL cluster

Questions:
- First. Is this deployment configuration possible?
- To address the clusterd MySQL, I have to specify "," seprated host/port in 
the uri. Will jboss accept this in the -ds.xml?
- In case of a filure in the active MySQL, MySQL will throw exception (switch 
over is not 100% transparent)... will this exception be treated as other 
"Transaction-Retry" exception?
- (I know the answer of this one but I will ask it to be on the safe side) In 
case of datbase lock time-out, will the AS retry the transaction (ex. call my 
stateless session bean method AGAIN)
- As a part of the appliction I have in-band JCA (converts socket requests into 
JMS to be processed later on by MDB), how can I make this part of the 
application HA ???
- MDB can be deployed in clustred mode but how can I make the JMS queue itself 
HA?


Thanks in advance for your help
Hamdy

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