Best ways to add indices to an existing ES instance

whats the best way to move over an index from one server to another, which already has its own index that is unrelated to the first server ?

basically the scenario is,
I have an index on server-1, which is used by website-1, and due to server cost, i want to move website-2 that will use its own ES index from server-2 on server-1.


Would this be what you're looking for? Snapshot & Restore to a different cluster?

This actually worked! thanks!

curl -XPUT 'http://localhost:9200/_snapshot/s1' -d '{"type": "fs","settings": {"location": "/var/es_backups/s1","compress": true}}'
curl -XPOST "http://localhost:9200/_snapshot/s1/2015_0513/_restore"

"/var/es_backups/s1" from old server.