What is the difference between POST an PUT in the ElasticSearch API?

[dadoonet (David Pilato)]

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When to use PUT versus POST?

It's all about REST semantics. POST basically that you are posting a request which is going to modify the server state. POST index/type { "foo": "bar" } will generate an _id server side and will index the document with this _id. PUT is used to send a resource to the server. PUT index/type/id { "foo": "bar" } will put or update a document named index/type/id in the server. Makes sense? More details here: https://en.wikipedia.org/wiki/Representational_state_transfer