Flink CDC :

DataStream:

优点：多库多表

缺点：需要自定义反序列化

FlinkSQL:

优点：不需要自定义反序列化

缺点：单表查询

FlinkCDC Maxwell Canal 断点续传 CK MySQL 本地磁盘 SQL->数据 无 无 一对一(炸开) 初始化功能 有(多库多表) 有(单表) 无 封装格式 自定义 JSON JSON(c/s自定义) 高可用 运行集群高可用 无 集群(ZK)

读取数据的格式不同   (CDC是自定义的数据类型  在这里就不进行展示了，主要是展示一下Maxwell和Canal的区别)

1.添加的区别

INSERT INTO z_user_info VALUES(30,zhang3,13810001010),(31,li4,1389999999);

1.1 Canal

{"data":[{"id":"30","user_name":"zhang3","tel":"13810001010"},{"id":"31","user_name":"li4","tel":"1389999999"}],"database":"jdmall-2020-04","es":1589385314000,"id":2,"isDdl":false,"mysqlType":{"id":"bigint(20)","user_name":"varchar(20)","tel":"varchar(20)"},"old":null,"pkNames":["id"],"sql":"","sqlType":{"id":-5,"user_name":12,"tel":12},"table":"z_user_info","ts":1589385314116,"type":"INSERT"}

1.2 Maxwell

{"database":"jdmall-2020-04","table":"z_user_info","type":"insert","ts":1589385314,"xid":82982,"xoffset":0,"data":{"id":30,"user_name":"zhang3","tel":"13810001010"}} {"database":"jdmall-2020-04","table":"z_user_info","type":"insert","ts":1589385314,"xid":82982,"commit":true,"data":{"id":31,"user_name":"li4","tel":"1389999999"}}

2.修改的区别

UPDATE z_user_info SET user_name=wang55 WHERE id IN(30,31)

2.1Canal

{"data":[{"id":"30","user_name":"wang55","tel":"13810001010"},{"id":"31","user_name":"wang55","tel":"1389999999"}],"database":"jdmall-2020-04","es":1589385508000,"id":3,"isDdl":false,"mysqlType":{"id":"bigint(20)","user_name":"varchar(20)","tel":"varchar(20)"},"old":[{"user_name":"zhang3"},{"user_name":"li4"}],"pkNames":["id"],"sql":"","sqlType":{"id":-5,"user_name":12,"tel":12},"table":"z_user_info","ts":1589385508676,"type":"UPDATE"}

2,2Maxwell

{"database":"jdmall-2020-04","table":"z_user_info","type":"update","ts":1589385508,"xid":83206,"xoffset":0,"data":{"id":30,"user_name":"wang55","tel":"13810001010"},"old":{"user_name":"zhang3"}} {"database":"jdmall-2020-04","table":"z_user_info","type":"update","ts":1589385508,"xid":83206,"commit":true,"data":{"id":31,"user_name":"wang55","tel":"1389999999"},"old":{"user_name":"li4"}}

3.删除的区别

DELETE FROM z_user_info WHERE id IN(30,31)

3.1 Canal

{"data":[{"id":"30","user_name":"wang55","tel":"13810001010"},{"id":"31","user_name":"wang55","tel":"1389999999"}],"database":"jdmall-2020-04","es":1589385644000,"id":4,"isDdl":false,"mysqlType":{"id":"bigint(20)","user_name":"varchar(20)","tel":"varchar(20)"},"old":null,"pkNames":["id"],"sql":"","sqlType":{"id":-5,"user_name":12,"tel":12},"table":"z_user_info","ts":1589385644829,"type":"DELETE"}

3.2 Maxwell

{"database":"jdmall-2020-04","table":"z_user_info","type":"delete","ts":1589385644,"xid":83367,"xoffset":0,"data":{"id":30,"user_name":"wang55","tel":"13810001010"}} {"database":"jdmall-2020-04","table":"z_user_info","type":"delete","ts":1589385644,"xid":83367,"commit":true,"data":{"id":31,"user_name":"wang55","tel":"1389999999"}}

以上是Canal和Maxwell的数据格式区别