This is Maxwell's daemon, a change data capture application that reads MySQL binlogs and writes data changes as JSON to Kafka, Kinesis, and other streaming platforms.

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What's it for?

• ETL of all sorts
• maintaining an audit log of all changes to your database
• cache building/expiring
• search indexing
• inter-service communication

  mysql> insert into `test`.`maxwell` set id = 1, daemon = 'Stanislaw Lem';
  maxwell: {
    "database": "test",
    "table": "maxwell",
    "type": "insert",
    "ts": 1449786310,
    "xid": 940752,
    "commit": true,
    "data": { "id":1, "daemon": "Stanislaw Lem" }
  }