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Assuming I have 5 machines I want to run an elasticsearch cluster on, and they are all connected to a shared drive. I put a single copy of elasticsearch onto that shared drive so all three can see it. Do I just start the elasticsearch on that shared drive on eall of my machines and the clustering would automatically work its magic? Or would I have to configure specific settings to get the elasticsearch to realize that its running on 5 machines? If so, what are the relevant settings? Should I worry about configuring for replicas or is it handled automatically?
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There are two ways to connect to your Elasticsearch cluster: Through the RESTful API or through the Java transport client. Both ways use an endpoint URL that includes a port, such as https://ec47fc4d2c53414e1307e85726d4b9bb.us-east-1.aws.found.io:9243 .
It is best to have a minimum of three nodes.
its super easy.
You'll need each machine to have it's own copy of ElasticSearch (simply copy the one you have now) -- the reason is that each machine / node whatever is going to keep it's own files that are sharded accross the cluster.
The only thing you really need to do is edit the config file to include the name of the cluster.
If all machines have the same cluster name elasticsearch will do the rest automatically (as long as the machines are all on the same network)
Read here to get you started: https://www.elastic.co/guide/en/elasticsearch/guide/current/deploy.html
When you create indexes (where the data goes) you define at that time how many replicas you want (they'll be distributed around the cluster)
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