How do I create multiple nodes on the same computer

Elastic Stack Elasticsearch
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I currently have one node running on my machine, but I'm curious how I can get 3 nodes running. Does each node require a separate yml config file with the same cluster.name or is there a way to specify within the one elasticsearch.yml file? I'm sure there's documentation out there for this, but I haven't been able to find anything specific to this topic.

My ES version:
Version: 5.1.1, Build: 5395e21/2016-12-06T12:36:15.409Z, JVM: 1.8.0_77

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You can read this:

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Thank you @dadoonet - that's what I needed. It looks like I'm just telling elasticsearch to give the data node (hopefully my terminology is correct here) and log file location different names. I'm assuming I can do the same right within my default yml config file on my dev machine and that's all I really need?

Thank you!

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I see this thread on Stack Overflow which I think will give me some insight into doing this. https://stackoverflow.com/questions/35717790/how-to-add-a-new-node-to-my-elasticsearch-cluster

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