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Daniel,

On 3/8/16 2:20 PM, Daniel Savard wrote:
> On the zero downtime deployments side, I would prefer a parallel 
> deployment approach. You can deploy a new version within the same 
> instance and have zero downtime as well without building a
> cluster.
> 
> I haven't experiment yet with this, but it is something I am
> looking forward to test in short term.

Having two JVMs also means that you can upgrade Tomcat and/or the JVM
without bringing down the service.

Of course, on a single machine, you would still need to bring down the
service for package updates, etc.

Then of course, there's VMs... it's possible to go completely crazy
unless you take a step back and decide what your uptime requirements
truly are.

- -chris
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