OLAKE_DIRECTORY/source.json

{
  "hosts": [
    "host1:27017",
    "host2:27017",
    "host3:27017"
  ],
  "username": "username",
  "password": "password",
  "authdb": "admin",
  "replica_set": "rs0",
  "read_preference": "secondaryPreferred",
  "srv": false,
  "database": "database",
  "max_threads": 5,
  "backoff_retry_count": 4,
  "chunking_strategy":""
}