{

"mqtt_opts": {
  "host": "127.0.0.1",
  "port": 1883,
  "keep_alive": 15
},
"bench_opts": {
  "topic": "mqtt_bench",
  "num_clients": 5,
  "data_size": 128,
  "num_msgs": 100,
  "interval": 1,
  "time_key": "time"
}

}