Elasticsearch Cluster Shards rebalancing

[DavidTurner]

@Nikesh

1. Will the unassigned shards to assigned to the newly added node?

Yes.

@Nikesh

2. To achieve the above, what are the configuration changes that I am supposed to do? Do I have to mention the IP of the newly added node in discovery.zen.ping.unicast.hosts?

No, you only need to list the addresses of the master-eligible nodes in discovery.zen.ping.unicast.hosts.

@Nikesh

1. When I add a new node,will the shards be rebalanced, by rebalance I mean will the existing shards be assigned to newly added node?

Yes.

(assuming a default configuration, i.e. you have nothing in your configuration that stops the shards being allocated to the new node, such as an allocation filtering rule, and you haven't disabled rebalancing)