The number of replicas to use. Replicas duplicate the compute resources and data of an index, allowing higher query throughput and availability. Setting replicas to 0 disables the index but can be used to reduce costs while usage is paused.
The number of shards to use. Increase this to provide more storage capacity.
The replica and shard counts to use for manually scaled dedicated read capacity. Both are required when creating an index; to change one of them on an existing index, see ConfigureIndexOptions.
See
Dedicated read nodes