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Websphere MQ dilemmas, inquiries and issues

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We have an application (app1) residing in server1. We also have an another application (app2) residing in server2. App1 is a web application, App2 is an executable java program. App1 communicates with App2 through JMS implemented using Oracle AQ.

Now there has been an initiative to move server2 to be hosted by the client, therefore moving it outside our network. We said it would be an issue since it both app communicates using the queue in Oracle database hosted inside our network. They suggested for the apps to communicate using JMS implemented through Websphere MQ instead.

My questions:

1. Would this just be an easy switch? or is it much more complicated than what we think?
2. Is setting up JMS in Websphere just as easy as creating queues and factories and you're done?
3. Where are the queues saved in websphere mq? is it saved at a certain folder in the websphere installation
path? as text files?
4. Is there a facility or a capability by websphere to switch the queue contents to another instance (this is for data recovery process in case something goes wrong with the production instance and we have to temporarily point applications to a backup instance)?

thanks and i would appreciate any help or advice.
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1) You likely have a firewall, so there are probably changes you aren't thinking of.
2) I recommend reading up on this in an IBM Redbook or in the help. I found queues finicky to set up. (also read up on buses and the activation spec) so you can make proper decisions.
3) I'm not sure exactly; I never went looking. I'm reasonably sure it isn't a text file though.
4) Yes. Search for "websphere mq failover" to read up on this. Some problems are helped by knowing the right search words. This is one of them .
I didn't say it. I'm just telling you what this tiny ad said.
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