ElasticSearch – Quick Recovery

PUT /_cluster/settings
{
  "persistent": {
    "cluster": {
      "routing": {
        "allocation.node_concurrent_recoveries": 500,
        "allocation.node_concurrent_outgoing_recoveries" :500,
        "allocation.node_concurrent_incoming_recoveries" :500,
        "allocation.node_initial_primaries_recoveries": 500
      }
    }
  }
}