Max data node throughput during ES recovery to new data nodes

We use ES 6.0 hosted on EC2 boxes with AWS EBS as the storage layer.
I was digging into the ES recovery API(https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-recovery.html).
Below is the recovery settings for my cluster:

{

  "persistent": {

    "cluster": {

      "routing": {

        "allocation": {

          "cluster_concurrent_rebalance": "2",

          "node_concurrent_recoveries": "2",

          "disk": {

            "watermark": {

              "low": "15.0gb",

              "flood_stage": "5.0gb",

              "high": "10.0gb"

            }

          },

          "node_initial_primaries_recoveries": "4"

        }

      },

      "blocks": {

        "create_index": "false"

      }

    },

    "indices": {

      "recovery": {

        "max_bytes_per_sec": "60mb"

      }

    }

  },

  "transient": {

    "cluster": {

      "routing": {

        "allocation": {

 "cluster_concurrent_rebalance": "2",

          "node_concurrent_recoveries": "2",

          "disk": {

            "watermark": {

              "low": "15.0gb",

              "flood_stage": "5.0gb",

              "high": "10.0gb"

            }

          },

          "exclude": {},

 "node_initial_primaries_recoveries": "4"

        }

      }

    },

    "indices": {

      "recovery": {

 "max_bytes_per_sec": "60mb"

      }

    }

  }

}

Questions:

  • Is there any recommendation on tuning above params?
  • Can someone explain based on above settings what is the max IOPS that can be seen per data node during recovery part from normal traffic?
    Is it node_concurrent_recoveries * max_bytes_per_sec ?