How much does storage increase when I add an instance to an Amazon ElasticSearch?

Question

My question is how much storage increases when the instance is added to amazon ElasticSearch?

Also when another instance is added to a cluster does it automatically re-balance the existing indexes or do we need to rebuild them?

Answer 1

If you go from one instance to two you basically double the storage. A when nodes join the cluster ES will automatically rebalance the shards to the new nodes.

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