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I've been reading about hadoop and multi-node setups, and it says in the documentation that you must have a JVM and hadoop software already running on those nodes.

My question is, do people install this software on each of these computers individually? or is there a software solution that automates this process?

I've also read about KVM switches, but I'm not sure whether this is what people usually use in these situations.

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It depends on your architecture. On UNIX systems, tools like puppet are really usefull : http://www.puppetlabs.com/ .

You have also deployement tools on windows systems throw groups management.

Then, you'll also need a monitoring tool.

I can't be really precise, as long as you don't give many information to build on.

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What information do you need? –  Mahmoud Hossam Jul 5 '11 at 16:50

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