Elastic Search Index, Shards and Replicas
Index, Shards and Replicas An index is automatically created when a document is inserted into the Elastic search. we can define the number shards, while creating the index or it will take default 5 shards It means elastic search will create 5 primary shards that will contain our data
Every time we index a document, elasticsearch will decide which primary shard is supposed to hold that document and will index it there.
