Datax助力轻松迁移SQLServer数据至GreatSQL

1.环境说明 1.1源端SQLSserver 版本IP端口Microsoft SQL Server 2017192.168.140.1601433 1.2目标端GreatSQL 版本IP端口GreatSQL-8.0.32192.168.139.863308 2.安装环境 2.1安装SQLServer环境 环境说明：借助Docker使用镜像启动数据库 2.1.1安装docker 1.安装基础软件包 $ yum install -y wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel wget vim ncurses-devel autoconf automake zlib-devel python-devel epel-release openssh-server socat ipvsadm conntrack yum-utils 2.配置 docker-ce 国内 yum 源（阿里云） $ yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo 3.安装 docker 依赖包 $ yum install -y device-mapper-persistent-data lvm2 4.安装 docker-ce $ yum install docker-ce -y 5.启动容器 $ systemctl start docker && systemctl enable docker 2.1.2 拉取镜像 $ docker pull mcr.microsoft.com/mssql/server:2017-latest 2.1.3运行容器 $ docker run -e "ACCEPT_EULA=Y" -e "SA_PASSWORD=********" \ -p 1433:1433 --name sqlserver2017 \ -d mcr.microsoft.com/mssql/server:2017-latest 此处记得密码设置为复杂密码 参数解释：

• -e "ACCEPT_EULA=Y"：默认选择同意协议许可证
• -e "SA_PASSWORD=********":设置连接密码，密码不能太短太简单，否则不满足sqlserver密码规范，容器会停止运行
• -p 1433:1433: 宿主机端口映射到容器端口（前者为宿主机）
• --name sqlserver2017：容器别名
• -d: 后台运行
• mcr.microsoft.com/mssql/server:2017-latest：镜像名称:标签

2.1.4使用数据库 1.进入容器 $ docker exec -it sqlserver2017 bash 2.连接数据库 $ /opt/mssql-tools/bin/sqlcmd -S localhost -U SA -P "********" 3.查询数据库 1> select name from sys.Databases; 2> go 4.创建数据库 1> create database testdb; 2> go 5.创建表并插入数据 use testdb create table t1(id int) go Insert into t1 values(1),(2) go 2.2安装GreatSQL环境 使用Docker镜像进行安装，直接拉取GreatSQL镜像即可 $ docker pull greatsql/greatsql 并创建GreatSQL容器 $ docker run -d --name greatsql --hostname=greatsql -e MYSQL_ALLOW_EMPTY_PASSWORD=1 greatsql/greatsql 2.3安装datax DataX安装需要依赖的环境

• JDK(1.8以上，推荐1.8)
• Python(推荐Python2.6.X及以上)

安装步骤，解压即用，但是解压完成不做其他操作运行job会报错 $ cd /soft $ ll total 3764708 -rw-r--r-- 1 root root 853734462 Dec 9 04:06 datax.tar.gz $ tar xf datax.tar.gz $ python /soft/datax/bin/datax.py /soft/datax/job/job.json DataX (DATAX-OPENSOURCE-3.0), From Alibaba ! Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved. 2023-07-19 11:19:17.483 [main] WARN ConfigParser - 插件[streamreader,streamwriter]加载失败，1s后重试... Exception:Code:[Common-00], Describe:[您提供的配置文件存在错误信息，请检查您的作业配置 .] - 配置信息错误，您提供的配置文件[/soft/datax/plugin/reader/._mysqlreader/plugin.json]不存在. 请检查您的配置文件. 2023-07-19 11:19:18.488 [main] ERROR Engine - 经DataX智能分析,该任务最可能的错误原因是: com.alibaba.datax.common.exception.DataXException: Code:[Common-00], Describe:[您提供的配置文件存在错误信息，请检查您的作业配置 .] - 配置信息错误，您提供的配置文件[/soft/datax/plugin/reader/._mysqlreader/plugin.json]不存在. 请检查您的配置文件. at com.alibaba.datax.common.exception.DataXException.asDataXException(DataXException.java:26) at com.alibaba.datax.common.util.Configuration.from(Configuration.java:95) at com.alibaba.datax.core.util.ConfigParser.parseOnePluginConfig(ConfigParser.java:153) at com.alibaba.datax.core.util.ConfigParser.parsePluginConfig(ConfigParser.java:125) at com.alibaba.datax.core.util.ConfigParser.parse(ConfigParser.java:63) at com.alibaba.datax.core.Engine.entry(Engine.java:137) at com.alibaba.datax.core.Engine.main(Engine.java:204) 解决报错:删除plugin目录下以及plugin/reader和plugin/writer目录下的所有._开头的文件 需要删除三个目录下的隐藏文件

• plugin/
• plugin/reader/
• plugin/writer/

$ rm -rf /opt/app/datax/plugin/._* $ rm -rf /opt/app/datax/plugin/reader/._* $ rm -rf /opt/app/datax/plugin/writer/._* 运行一个测例，检测datax是否安装成功 $ python /soft/datax/bin/datax.py /soft/datax/job/job.json DataX (DATAX-OPENSOURCE-3.0), From Alibaba ! Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved. 2023-07-19 11:22:12.298 [main] INFO VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl 2023-07-19 11:22:12.305 [main] INFO Engine - the machine info => osInfo: Oracle Corporation 1.8 25.251-b08 jvmInfo: Linux amd64 4.19.25-200.1.el7.bclinux.x86_64 cpu num: 48 totalPhysicalMemory: -0.00G freePhysicalMemory: -0.00G maxFileDescriptorCount: -1 currentOpenFileDescriptorCount: -1 GC Names [PS MarkSweep, PS Scavenge] MEMORY_NAME | allocation_size | init_size PS Eden Space | 256.00MB | 256.00MB Code Cache | 240.00MB | 2.44MB Compressed Class Space | 1,024.00MB | 0.00MB PS Survivor Space | 42.50MB | 42.50MB PS Old Gen | 683.00MB | 683.00MB Metaspace | -0.00MB | 0.00MB 2023-07-19 11:22:12.320 [main] INFO Engine - {"content":[{"reader":{"name":"streamreader", "parameter":{"column":[ {"type":"string","value":"DataX"}, {"type":"long","value":19890604}, {"type":"date","value":"1989-06-04 00:00:00"}, {"type":"bool","value":true}, {"type":"bytes","value":"test"} ],"sliceRecordCount":100000} },"writer":{"name":"streamwriter","parameter":{"encoding":"UTF-8","print":false}}}], "setting":{"errorLimit":{"percentage":0.02,"record":0}, "speed":{"byte":10485760}}} 2023-07-19 11:22:12.336 [main] WARN Engine - prioriy set to 0, because NumberFormatException, the value is: null 2023-07-19 11:22:12.337 [main] INFO PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0 2023-07-19 11:22:12.338 [main] INFO JobContainer - DataX jobContainer starts job. 2023-07-19 11:22:12.339 [main] INFO JobContainer - Set jobId = 0 2023-07-19 11:22:12.352 [job-0] INFO JobContainer - jobContainer starts to do prepare ... 2023-07-19 11:22:12.352 [job-0] INFO JobContainer - DataX Reader.Job [streamreader] do prepare work . 2023-07-19 11:22:12.352 [job-0] INFO JobContainer - DataX Writer.Job [streamwriter] do prepare work . 2023-07-19 11:22:12.352 [job-0] INFO JobContainer - jobContainer starts to do split ... 2023-07-19 11:22:12.353 [job-0] INFO JobContainer - Job set Max-Byte-Speed to 10485760 bytes. 2023-07-19 11:22:12.354 [job-0] INFO JobContainer - DataX Reader.Job [streamreader] splits to [1] tasks. 2023-07-19 11:22:12.354 [job-0] INFO JobContainer - DataX Writer.Job [streamwriter] splits to [1] tasks. 2023-07-19 11:22:12.371 [job-0] INFO JobContainer - jobContainer starts to do schedule ... 2023-07-19 11:22:12.375 [job-0] INFO JobContainer - Scheduler starts [1] taskGroups. 2023-07-19 11:22:12.376 [job-0] INFO JobContainer - Running by standalone Mode. 2023-07-19 11:22:12.384 [taskGroup-0] INFO TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks. 2023-07-19 11:22:12.388 [taskGroup-0] INFO Channel - Channel set byte_speed_limit to -1, No bps activated. 2023-07-19 11:22:12.388 [taskGroup-0] INFO Channel - Channel set record_speed_limit to -1, No tps activated. 2023-07-19 11:22:12.396 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started 2023-07-19 11:22:12.697 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[302]ms 2023-07-19 11:22:12.698 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] completed it's tasks. 2023-07-19 11:22:22.402 [job-0] INFO StandAloneJobContainerCommunicator - Total 100000 records, 2600000 bytes | Speed 253.91KB/s, 10000 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.020s | All Task WaitReaderTime 0.033s | Percentage 100.00% 2023-07-19 11:22:22.402 [job-0] INFO AbstractScheduler - Scheduler accomplished all tasks. 2023-07-19 11:22:22.402 [job-0] INFO JobContainer - DataX Writer.Job [streamwriter] do post work. 2023-07-19 11:22:22.403 [job-0] INFO JobContainer - DataX Reader.Job [streamreader] do post work. 2023-07-19 11:22:22.403 [job-0] INFO JobContainer - DataX jobId [0] completed successfully. 2023-07-19 11:22:22.403 [job-0] INFO HookInvoker - No hook invoked, because base dir not exists or is a file: /soft/datax/hook 2023-07-19 11:22:22.404 [job-0] INFO JobContainer - [total cpu info] => averageCpu | maxDeltaCpu | minDeltaCpu -1.00% | -1.00% | -1.00% [total gc info] => NAME | totalGCCount | maxDeltaGCCount | minDeltaGCCount | totalGCTime | maxDeltaGCTime | minDeltaGCTime PS MarkSweep | 0 | 0 | 0 | 0.000s | 0.000s | 0.000s PS Scavenge | 0 | 0 | 0 | 0.000s | 0.000s | 0.000s 2023-07-19 11:22:22.404 [job-0] INFO JobContainer - PerfTrace not enable! 2023-07-19 11:22:22.404 [job-0] INFO StandAloneJobContainerCommunicator - Total 100000 records, 2600000 bytes | Speed 253.91KB/s, 10000 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.020s | All Task WaitReaderTime 0.033s | Percentage 100.00% 2023-07-19 11:22:22.406 [job-0] INFO JobContainer - 任务启动时刻 : 2023-07-19 11:22:12 任务结束时刻 : 2023-07-19 11:22:22 任务总计耗时 : 10s 任务平均流量 : 253.91KB/s 记录写入速度 : 10000rec/s 读出记录总数 : 100000 读写失败总数 : 0 3.SQLServer2GreatSQL全量迁移 3.1 源端（SQLServer）造测试数据 $ docker exec -it 47bd0ed79c26 /bin/bash $ /opt/mssql-tools/bin/sqlcmd -S localhost -U SA -P "********" 1> create database testdb 1> use testdb 1> insert into t1 values(1),(2),(3); 2> go 1> select * from t1; 2> go id \----------- 1 2 3 3.2 目标端（GreatSQL）创建表结构 greatsql> create database testdb; greatsql> use testdb; greatsql> create table t1 (id int primary key); 3.3 编写Datax的job文件 $ cat /soft/datax/job/sqlserver_to_greatsql.json { "job": { "content": [ { "reader": { "name": "sqlserverreader", "parameter": { "connection": [ { "jdbcUrl": ["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table": ["t1"] } ], "password": "********", "username": "SA", "column": ["*"] } }, "writer": { "name": "mysqlwriter", "parameter": { "column": ["*"], "connection": [ { "jdbcUrl": "jdbc:mysql://10.17.139.86:3308/testdb", "table": ["t1"] } ], "password": "******", "session": [], "username": "admin", "writeMode": "insert" } } } ], "setting": { "speed": { "channel": "5" } } } } 3.4 运行Datax迁移任务 $ python /soft/datax/bin/datax.py /soft/datax/job/sqlserver_to_greatsql.json DataX (DATAX-OPENSOURCE-3.0), From Alibaba ! Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved. 2023-11-28 09:58:44.087 [main] INFO VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl 2023-11-28 09:58:44.104 [main] INFO Engine - the machine info => osInfo: Oracle Corporation 1.8 25.181-b13 jvmInfo: Linux amd64 3.10.0-957.el7.x86_64 cpu num: 8 totalPhysicalMemory: -0.00G freePhysicalMemory: -0.00G maxFileDescriptorCount: -1 currentOpenFileDescriptorCount: -1 GC Names [PS MarkSweep, PS Scavenge] MEMORY_NAME | allocation_size | init_size PS Eden Space | 256.00MB | 256.00MB Code Cache | 240.00MB | 2.44MB Compressed Class Space | 1,024.00MB | 0.00MB PS Survivor Space | 42.50MB | 42.50MB PS Old Gen | 683.00MB | 683.00MB Metaspace | -0.00MB | 0.00MB 2023-11-28 09:58:44.137 [main] INFO Engine - { "content":[ {"reader":{ "name":"sqlserverreader", "parameter":{ "column":["*"], "connection":[ {"jdbcUrl":["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table":["t1"]}], "password":"*************", "username":"SA"}}, "writer":{"name":"mysqlwriter","parameter":{"column":["*"], "connection":[{"jdbcUrl":"jdbc:mysql://10.17.139.86:3308/testdb", "table":["t1"]}], "password":"********", "session":[], "username":"admin", "writeMode":"insert"}}}], "setting":{"speed":{"channel":"5"}}} 2023-11-28 09:58:44.176 [main] WARN Engine - prioriy set to 0, because NumberFormatException, the value is: null 2023-11-28 09:58:44.179 [main] INFO PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0 2023-11-28 09:58:44.180 [main] INFO JobContainer - DataX jobContainer starts job. 2023-11-28 09:58:44.183 [main] INFO JobContainer - Set jobId = 0 2023-11-28 09:58:44.542 [job-0] INFO OriginalConfPretreatmentUtil - Available jdbcUrl:jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb. 2023-11-28 09:58:44.544 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置存在一定的风险. 因为您未配置读取数据库表的列，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary. 2023-11-28 09:58:45.099 [job-0] INFO OriginalConfPretreatmentUtil - table:[t1] all columns:[id]. 2023-11-28 09:58:45.099 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置信息存在风险. 因为您配置的写入数据库表的列为*，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. 2023-11-28 09:58:45.102 [job-0] INFO OriginalConfPretreatmentUtil - Write data [ insert INTO %s (id) VALUES(?) ], which jdbcUrl like:[jdbc:mysql://10..17.139.86:16310/testdb?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true] 2023-11-28 09:58:45.103 [job-0] INFO JobContainer - jobContainer starts to do prepare ... 2023-11-28 09:58:45.103 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do prepare work 2023-11-28 09:58:45.104 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do prepare work . 2023-11-28 09:58:45.104 [job-0] INFO JobContainer - jobContainer starts to do split ... 2023-11-28 09:58:45.105 [job-0] INFO JobContainer - Job set Channel-Number to 5 channels. 2023-11-28 09:58:45.112 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] splits to [1] tasks. 2023-11-28 09:58:45.114 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] splits to [1] tasks. 2023-11-28 09:58:45.135 [job-0] INFO JobContainer - jobContainer starts to do schedule ... 2023-11-28 09:58:45.139 [job-0] INFO JobContainer - Scheduler starts [1] taskGroups. 2023-11-28 09:58:45.142 [job-0] INFO JobContainer - Running by standalone Mode. 2023-11-28 09:58:45.151 [taskGroup-0] INFO TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks. 2023-11-28 09:58:45.157 [taskGroup-0] INFO Channel - Channel set byte_speed_limit to -1, No bps activated. 2023-11-28 09:58:45.158 [taskGroup-0] INFO Channel - Channel set record_speed_limit to -1, No tps activated. 2023-11-28 09:58:45.173 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started 2023-11-28 09:58:45.181 [0-0-0-reader] INFO CommonRdbmsReader$Task - Begin to read record by Sql: [select * from t1 ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 09:58:45.398 [0-0-0-reader] INFO CommonRdbmsReader$Task - Finished read record by Sql: [select * from t1 ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 09:58:45.454 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[284]ms 2023-11-28 09:58:45.455 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] completed it's tasks. 2023-11-28 09:58:55.175 [job-0] INFO StandAloneJobContainerCommunicator - Total 3 records, 3 bytes | Speed 0B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 09:58:55.175 [job-0] INFO AbstractScheduler - Scheduler accomplished all tasks. 2023-11-28 09:58:55.175 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do post work. 2023-11-28 09:58:55.176 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do post work. 2023-11-28 09:58:55.176 [job-0] INFO JobContainer - DataX jobId [0] completed successfully. 2023-11-28 09:58:55.176 [job-0] INFO HookInvoker - No hook invoked, because base dir not exists or is a file: /soft/datax/hook 2023-11-28 09:58:55.177 [job-0] INFO JobContainer - [total cpu info] => averageCpu | maxDeltaCpu | minDeltaCpu -1.00% | -1.00% | -1.00% [total gc info] => NAME | totalGCCount | maxDeltaGCCount | minDeltaGCCount | totalGCTime | maxDeltaGCTime | minDeltaGCTime PS MarkSweep | 1 | 1 | 1 | 0.061s | 0.061s | 0.061s PS Scavenge | 1 | 1 | 1 | 0.039s | 0.039s | 0.039s 2023-11-28 09:58:55.177 [job-0] INFO JobContainer - PerfTrace not enable! 2023-11-28 09:58:55.177 [job-0] INFO StandAloneJobContainerCommunicator - Total 3 records, 3 bytes | Speed 0B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 09:58:55.179 [job-0] INFO JobContainer - 任务启动时刻 : 2023-11-28 09:58:44 任务结束时刻 : 2023-11-28 09:58:55 任务总计耗时 : 10s 任务平均流量 : 0B/s 记录写入速度 : 0rec/s 读出记录总数 : 3 读写失败总数 : 0 3.5 到目标端验证数据 greatsql> select * from t1; +----+ | id | +----+ | 1 | | 2 | | 3 | +----+ 3 rows in set (0.01 sec) 4. SQLServer to GreatSQL增量迁移 4.1 源端（SQLServer）创建测试数据 2> create table t2 (id int,createtime datetime); 3> go 1> insert into t2 values(1,GETDATE()); 2> g (1 rows affected) 1> insert into t2 values(2,GETDATE()); 2> go (1 rows affected) 1> insert into t2 values(3,GETDATE()); 2> go (1 rows affected) 1> insert into t2 values(4,GETDATE()); 2> go (1 rows affected) 1> insert into t2 values(5,GETDATE()); 2> go (1 rows affected) 1> insert into t2 values(6,GETDATE()); 2> go (1 rows affected) 1> select * from t2; 2> go id createtime ---------- ----------------------- 1 2023-11-28 02:18:20.790 2 2023-11-28 02:18:27.040 3 2023-11-28 02:18:32.103 4 2023-11-28 02:18:37.690 5 2023-11-28 02:18:41.450 6 2023-11-28 02:18:46.330 4.2 编写Datax的全量迁移job文件 $ cat sqlserver_to_greatsql_inc.json { "job": { "content": [ { "reader": { "name": "sqlserverreader", "parameter": { "connection": [ { "jdbcUrl": ["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table": ["t2"] } ], "password": "********", "username": "SA", "column": ["*"] } }, "writer": { "name": "mysqlwriter", "parameter": { "column": ["*"], "connection": [ { "jdbcUrl": "jdbc:mysql://10.17.139.86:3308/testdb", "table": ["t2"] } ], "password": "!QAZ2wsx", "session": [], "username": "admin", "writeMode": "insert" } } } ], "setting": { "speed": { "channel": "5" } } } } 4.3 运行Datax全量迁移任务 $ python /soft/datax/bin/datax.py /soft/datax/job/sqlserver_to_greatsql_inc.json DataX (DATAX-OPENSOURCE-3.0), From Alibaba ! Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved. 2023-11-28 10:19:59.279 [main] INFO VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl 2023-11-28 10:19:59.286 [main] INFO Engine - the machine info => osInfo: Oracle Corporation 1.8 25.181-b13 jvmInfo: Linux amd64 3.10.0-957.el7.x86_64 cpu num: 8 totalPhysicalMemory: -0.00G freePhysicalMemory: -0.00G maxFileDescriptorCount: -1 currentOpenFileDescriptorCount: -1 GC Names [PS MarkSweep, PS Scavenge] MEMORY_NAME | allocation_size | init_size PS Eden Space | 256.00MB | 256.00MB Code Cache | 240.00MB | 2.44MB Compressed Class Space | 1,024.00MB | 0.00MB PS Survivor Space | 42.50MB | 42.50MB PS Old Gen | 683.00MB | 683.00MB Metaspace | -0.00MB | 0.00MB 2023-11-28 10:19:59.302 [main] INFO Engine - {"content":[{"reader":{"name":"sqlserverreader","parameter":{"column":[ "*"],"connection":[{"jdbcUrl":["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table":["t2"]}],"password":"*************","username":"SA"}}, "writer":{"name":"mysqlwriter","parameter":{"column":["*"], "connection":[{"jdbcUrl":"jdbc:mysql://10..17.139.86:16310/testdb","table":["t2"]}], "password":"********", "session":[], "username":"admin", "writeMode":"insert"}}}], "setting":{"speed":{"channel":"5"}}} 2023-11-28 10:19:59.319 [main] WARN Engine - prioriy set to 0, because NumberFormatException, the value is: null 2023-11-28 10:19:59.321 [main] INFO PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0 2023-11-28 10:19:59.321 [main] INFO JobContainer - DataX jobContainer starts job. 2023-11-28 10:19:59.324 [main] INFO JobContainer - Set jobId = 0 2023-11-28 10:19:59.629 [job-0] INFO OriginalConfPretreatmentUtil - Available jdbcUrl:jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb. 2023-11-28 10:19:59.630 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置存在一定的风险. 因为您未配置读取数据库表的列，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary. 2023-11-28 10:20:00.027 [job-0] INFO OriginalConfPretreatmentUtil - table:[t2] all columns:[ id,createtime]. 2023-11-28 10:20:00.027 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置信息存在风险. 因为您配置的写入数据库表的列为*，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. 2023-11-28 10:20:00.029 [job-0] INFO OriginalConfPretreatmentUtil - Write data [ insert INTO %s (id,createtime) VALUES(?,?) ], which jdbcUrl like:[jdbc:mysql://10..17.139.86:16310/testdb?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true] 2023-11-28 10:20:00.030 [job-0] INFO JobContainer - jobContainer starts to do prepare ... 2023-11-28 10:20:00.031 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do prepare work . 2023-11-28 10:20:00.031 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do prepare work . 2023-11-28 10:20:00.032 [job-0] INFO JobContainer - jobContainer starts to do split ... 2023-11-28 10:20:00.032 [job-0] INFO JobContainer - Job set Channel-Number to 5 channels. 2023-11-28 10:20:00.037 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] splits to [1] tasks. 2023-11-28 10:20:00.038 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] splits to [1] tasks. 2023-11-28 10:20:00.060 [job-0] INFO JobContainer - jobContainer starts to do schedule ... 2023-11-28 10:20:00.063 [job-0] INFO JobContainer - Scheduler starts [1] taskGroups. 2023-11-28 10:20:00.066 [job-0] INFO JobContainer - Running by standalone Mode. 2023-11-28 10:20:00.073 [taskGroup-0] INFO TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks. 2023-11-28 10:20:00.080 [taskGroup-0] INFO Channel - Channel set byte_speed_limit to -1, No bps activated. 2023-11-28 10:20:00.080 [taskGroup-0] INFO Channel - Channel set record_speed_limit to -1, No tps activated. 2023-11-28 10:20:00.093 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started 2023-11-28 10:20:00.101 [0-0-0-reader] INFO CommonRdbmsReader$Task - Begin to read record by Sql: [select * from t2 ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 10:20:00.262 [0-0-0-reader] INFO CommonRdbmsReader$Task - Finished read record by Sql: [select * from t2 ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 10:20:00.334 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[243]ms 2023-11-28 10:20:00.335 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] completed it's tasks. 2023-11-28 10:20:10.087 [job-0] INFO StandAloneJobContainerCommunicator - Total 6 records, 54 bytes | Speed 5B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 10:20:10.088 [job-0] INFO AbstractScheduler - Scheduler accomplished all tasks. 2023-11-28 10:20:10.088 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do post work. 2023-11-28 10:20:10.089 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do post work. 2023-11-28 10:20:10.090 [job-0] INFO JobContainer - DataX jobId [0] completed successfully. 2023-11-28 10:20:10.091 [job-0] INFO HookInvoker - No hook invoked, because base dir not exists or is a file: /soft/datax/hook 2023-11-28 10:20:10.094 [job-0] INFO JobContainer - [total cpu info] => averageCpu | maxDeltaCpu | minDeltaCpu -1.00% | -1.00% | -1.00% [total gc info] => NAME | totalGCCount | maxDeltaGCCount | minDeltaGCCount | totalGCTime | maxDeltaGCTime | minDeltaGCTime PS MarkSweep | 1 | 1 | 1 | 0.034s | 0.034s | 0.034s PS Scavenge | 1 | 1 | 1 | 0.031s | 0.031s | 0.031s 2023-11-28 10:20:10.094 [job-0] INFO JobContainer - PerfTrace not enable! 2023-11-28 10:20:10.095 [job-0] INFO StandAloneJobContainerCommunicator - Total 6 records, 54 bytes | Speed 5B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 10:20:10.097 [job-0] INFO JobContainer - 任务启动时刻 : 2023-11-28 10:19:59 任务结束时刻 : 2023-11-28 10:20:10 任务总计耗时 : 10s 任务平均流量 : 5B/s 记录写入速度 : 0rec/s 读出记录总数 : 6 读写失败总数 : 0 4.4 验证全量迁移的数据 greatsql> select * from t2; +----+---------------------+ | id | createtime | +----+---------------------+ | 1 | 2023-11-28 02:18:21 | | 2 | 2023-11-28 02:18:27 | | 3 | 2023-11-28 02:18:32 | | 4 | 2023-11-28 02:18:38 | | 5 | 2023-11-28 02:18:41 | | 6 | 2023-11-28 02:18:46 | +----+---------------------+ 还可以用 checksum table x 来验证，大表就不能全表select * 了 4.5 源端（SQLServer）插入增量数据 2> insert into t2 values(7,'202311-28 03:18:46.330'); 3> go Changed database context to 'jem_db'. (1 rows affected) 1> insert into t2 values(8,'2023-11-28 03:20:46.330'); 2> go (1 rows affected) 1> insert into t2 values(9,'2023-11-28 03:25:46.330'); 2> go (1 rows affected) 1> insert into t2 values(10,'2023-11-28 03:30:46.330'); 2> go (1 rows affected) 1> select * from t2; 2> go id createtime ----------- ----------------------- 1 2023-11-28 02:18:20.790 2 2023-11-28 02:18:27.040 3 2023-11-28 02:18:32.103 4 2023-11-28 02:18:37.690 5 2023-11-28 02:18:41.450 6 2023-11-28 02:18:46.330 7 2023-11-28 03:18:46.330 8 2023-11-28 03:20:46.330 9 2023-11-28 03:25:46.330 10 2023-11-28 03:30:46.330 4.6 编写Datax增量迁移job文件 $ cat sqlserver_to_greatsql_inc.json { "job": { "content": [ { "reader": { "name": "sqlserverreader", "parameter": { "connection": [ { "jdbcUrl": ["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table": ["t2"] } ], "password": "********", "username": "SA", "column": ["*"], "where":"createtime > '${start_time}' and createtime < '${end_time}'" } }, "writer": { "name": "mysqlwriter", "parameter": { "column": ["*"], "connection": [ { "jdbcUrl": "jdbc:mysql://10..17.139.86:16310/testdb", "table": ["t2"] } ], "password": "!QAZ2wsx", "session": [], "username": "admin", "writeMode": "insert" } } } ], "setting": { "speed": { "channel": "5" } } } } 4.7 运行Datax增量迁移任务 $ python /soft/datax/bin/datax.py /soft/datax/job/sqlserver_to_mysql_inc.json -p "-Dstart_time='2023-11-28 03:17:46.330' -Dend_time='2023-11-28 03:31:46.330'" DataX (DATAX-OPENSOURCE-3.0), From Alibaba ! Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved. 2023-11-28 10:29:24.492 [main] INFO VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl 2023-11-28 10:29:24.504 [main] INFO Engine - the machine info => osInfo: Oracle Corporation 1.8 25.181-b13 jvmInfo: Linux amd64 3.10.0-957.el7.x86_64 cpu num: 8 totalPhysicalMemory: -0.00G freePhysicalMemory: -0.00G maxFileDescriptorCount: -1 currentOpenFileDescriptorCount: -1 GC Names [PS MarkSweep, PS Scavenge] MEMORY_NAME | allocation_size | init_size PS Eden Space | 256.00MB | 256.00MB Code Cache | 240.00MB | 2.44MB Compressed Class Space | 1,024.00MB | 0.00MB PS Survivor Space | 42.50MB | 42.50MB PS Old Gen | 683.00MB | 683.00MB Metaspace | -0.00MB | 0.00MB 2023-11-28 10:29:24.524 [main] INFO Engine - {"content":[{"reader":{"name":"sqlserverreader","parameter":{"column":["*"], "connection":[{"jdbcUrl":["jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb"], "table":["t2"]}],"password":"*************","username":"SA", "where":"createtime > '2023-11-28 03:17:46.330' and createtime < '2023-11-28 03:31:46.330'"}}, "writer":{"name":"mysqlwriter","parameter":{"column":["*"],"connection":[{"jdbcUrl":"jdbc:mysql://10..17.139.86:16310/testdb","table":["t2"]}], "password":"********", "session":[], "username":"admin", "writeMode":"insert"}}}], "setting":{"speed":{"channel":"5"}}} 2023-11-28 10:29:24.542 [main] WARN Engine - prioriy set to 0, because NumberFormatException, the value is: null 2023-11-28 10:29:24.544 [main] INFO PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0 2023-11-28 10:29:24.544 [main] INFO JobContainer - DataX jobContainer starts job. 2023-11-28 10:29:24.546 [main] INFO JobContainer - Set jobId = 0 2023-11-28 10:29:24.830 [job-0] INFO OriginalConfPretreatmentUtil - Available jdbcUrl:jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb. 2023-11-28 10:29:24.831 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置存在一定的风险. 因为您未配置读取数据库表的列，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary. 2023-11-28 10:29:25.113 [job-0] INFO OriginalConfPretreatmentUtil - table:[t2] all columns:[id,createtime]. 2023-11-28 10:29:25.113 [job-0] WARN OriginalConfPretreatmentUtil - 您的配置文件中的列配置信息存在风险. 因为您配置的写入数据库表的列为*，当您的表字段个数、类型有变动时，可能影响任务正确性甚至会运行出错。请检查您的配置并作出修改. 2023-11-28 10:29:25.115 [job-0] INFO OriginalConfPretreatmentUtil - Write data [ insert INTO %s (id,createtime) VALUES(?,?) ], which jdbcUrl like:[jdbc:mysql://10..17.139.86:16310/testdb?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true] 2023-11-28 10:29:25.116 [job-0] INFO JobContainer - jobContainer starts to do prepare ... 2023-11-28 10:29:25.117 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do prepare work . 2023-11-28 10:29:25.117 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do prepare work . 2023-11-28 10:29:25.118 [job-0] INFO JobContainer - jobContainer starts to do split ... 2023-11-28 10:29:25.118 [job-0] INFO JobContainer - Job set Channel-Number to 5 channels. 2023-11-28 10:29:25.123 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] splits to [1] tasks. 2023-11-28 10:29:25.124 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] splits to [1] tasks. 2023-11-28 10:29:25.146 [job-0] INFO JobContainer - jobContainer starts to do schedule ... 2023-11-28 10:29:25.150 [job-0] INFO JobContainer - Scheduler starts [1] taskGroups. 2023-11-28 10:29:25.153 [job-0] INFO JobContainer - Running by standalone Mode. 2023-11-28 10:29:25.159 [taskGroup-0] INFO TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks. 2023-11-28 10:29:25.165 [taskGroup-0] INFO Channel - Channel set byte_speed_limit to -1, No bps activated. 2023-11-28 10:29:25.165 [taskGroup-0] INFO Channel - Channel set record_speed_limit to -1, No tps activated. 2023-11-28 10:29:25.176 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started 2023-11-28 10:29:25.183 [0-0-0-reader] INFO CommonRdbmsReader$Task - Begin to read record by Sql: [select * from t2 where (createtime > '2023-11-28 03:17:46.330' and createtime < '2023-11-28 03:31:46.330') ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 10:29:25.344 [0-0-0-reader] INFO CommonRdbmsReader$Task - Finished read record by Sql: [select * from t2 where (createtime > '2023-11-28 03:17:46.330' and createtime < '2023-11-28 03:31:46.330') ] jdbcUrl:[jdbc:sqlserver://127.0.0.1:1433;DatabaseName=testdb]. 2023-11-28 10:29:25.606 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[431]ms 2023-11-28 10:29:25.607 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] completed it's tasks. 2023-11-28 10:29:35.173 [job-0] INFO StandAloneJobContainerCommunicator - Total 4 records, 37 bytes | Speed 3B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 10:29:35.173 [job-0] INFO AbstractScheduler - Scheduler accomplished all tasks. 2023-11-28 10:29:35.174 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do post work. 2023-11-28 10:29:35.175 [job-0] INFO JobContainer - DataX Reader.Job [sqlserverreader] do post work. 2023-11-28 10:29:35.175 [job-0] INFO JobContainer - DataX jobId [0] completed successfully. 2023-11-28 10:29:35.177 [job-0] INFO HookInvoker - No hook invoked, because base dir not exists or is a file: /soft/datax/hook 2023-11-28 10:29:35.179 [job-0] INFO JobContainer - [total cpu info] => averageCpu | maxDeltaCpu | minDeltaCpu -1.00% | -1.00% | -1.00% [total gc info] => NAME | totalGCCount | maxDeltaGCCount | minDeltaGCCount | totalGCTime | maxDeltaGCTime | minDeltaGCTime PS MarkSweep | 1 | 1 | 1 | 0.052s | 0.052s | 0.052s PS Scavenge | 1 | 1 | 1 | 0.024s | 0.024s | 0.024s 2023-11-28 10:29:35.180 [job-0] INFO JobContainer - PerfTrace not enable! 2023-11-28 10:29:35.181 [job-0] INFO StandAloneJobContainerCommunicator - Total 4 records, 37 bytes | Speed 3B/s, 0 records/s | Error 0 records, 0 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00% 2023-11-28 10:29:35.183 [job-0] INFO JobContainer - 任务启动时刻 : 2023-11-28 10:29:24 任务结束时刻 : 2023-11-28 10:29:35 任务总计耗时 : 10s 任务平均流量 : 3B/s 记录写入速度 : 0rec/s 读出记录总数 : 4 读写失败总数 : 0 4.8 到目标端（GreatSQL）验证增量数据 greatsql> select * from t2; +----+---------------------+ | id | createtime | +----+---------------------+ | 1 | 2023-11-28 02:18:21 | | 2 | 2023-11-28 02:18:27 | | 3 | 2023-11-28 02:18:32 | | 4 | 2023-11-28 02:18:38 | | 5 | 2023-11-28 02:18:41 | | 6 | 2023-11-28 02:18:46 | | 7 | 2023-11-28 03:18:46 | | 8 | 2023-11-28 03:20:46 | | 9 | 2023-11-28 03:25:46 | | 10 | 2023-11-28 03:30:46 | +----+---------------------+ 10 rows in set (0.00 sec) 增量迁移总结：通过增加过滤条件达到增量迁移的目的。主要是通过过滤条件过滤掉了全量迁移的数据，进而变相的完成了增量迁移。