I have a ES cluster (3 data nodes + 1 coordinate-only node) currently running, having a number of indices.
I am planning to migrate to another cluster. Is there a way I can migrate all my current indices to new cluster?
If i just copy my data directory to new cluster, will that be sufficient?
One more thing, if I go for re-indexing, the host name that we mention, should it be coordinate-only node?
And, query is not mandatory, right? I mean I can just mention index name, example config below mentioned.