{
    "demo_address": ["127.0.0.1:1234"],
    "demo_host": ["demo-server:1234"],
    "master_address_list": ["127.0.0.1:10245", "127.0.0.1:10246", "127.0.0.1:10247"],
    "demo_record_num": 50000,
    "job_num": 2,
    "file_num": 5
}