Specify the data format to be printed. Supported formats are msgpack, json, json_lines and json_stream.
msgpack
json_date_key
Specify the name of the time key in the output record. To disable the time key just set the value to false.
date
json_date_format
Specify the format of the date. Supported formats are double, epoch, iso8601 (eg: 2018-05-30T09:39:52.000681Z) and java_sql_timestamp (eg: 2018-05-30 09:39:52.000681)
double
workers
The number of workers to perform flush operations for this output.