基于DataX的crontab定时同步功能——CentOS7.6下DataX完美详细安装配置使用解析，和crontab灵魂结合
DataX crontab亵玩 学习
0.环境
现在JDK版本是需要1.8了，官方源码都进行了升级
| ITEM | VERSION |
|---|---|
| CentOS | 7.6 |
| JDK | 1.8.0_232 |
| Python | 2.7.15 |
| Maven | 3.6.3 |
1.JDK安装配置【完美】
# 卸载默认环境
yum -y remove java-1.8.0-openjdk*
yum -y remove tzdata-java*
# 下载安装依赖
yum install -y java-1.8.0-openjdk java-1.8.0-openjdk-devel
# 查到系统默认安装jdk的位置/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.el7_6.x86_64/jre/bin/java
[root@ansible-server randolph]# ls -lrt /usr/bin/java
lrwxrwxrwx 1 root root 22 8月 23 13:42 /usr/bin/java -> /etc/alternatives/java
[root@ansible-server randolph]# ls -lrt /etc/alternatives/java
lrwxrwxrwx 1 root root 73 8月 23 13:42 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.el7_6.x86_64/jre/bin/java
# 加到环境变量
vim /etc/profile
# jdk
export JAVA_HOME=/usr/lib/jvm/java-1.8.0
export JRE_HOME=$JAVA_HOME/jre
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
source /etc/profile
# 检测
java -version
javac
2.Maven安装配置——用于编译git clone下来的源码
cd /opt/
wget https://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
tar -zxvf apache-maven-3.6.3-bin.tar.gz
mv apache-maven-3.6.3/ maven # 改名方便操作
vim /etc/profile # 修改配置文件，并在末尾添加
# maven
M2_HOME=/opt/maven # 这里的路径注意下
export PATH=${M2_HOME}/bin:${PATH}
# 重载文件立即生效
source /etc/profile
检查maven安装是否成功
mvn -v
检查maven已经安装
[root@ansible-server opt]# mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /opt/maven
Java version: 1.8.0_222, vendor: Oracle Corporation, runtime: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.el7_6.x86_64/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "linux", version: "3.10.0-957.27.2.el7.x86_64", arch: "amd64", family: "unix"
3.检查系统版本、python版本
实际上有python2/3都OK，后面datax的bin文件夹下的三个py文件datax.py也有python2/3版本，在执行命令的时候只需要对应即可。
[root@client-1 ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@ansible-server DataX]# java -version
openjdk version "1.8.0_232"
OpenJDK Runtime Environment (build 1.8.0_232-b09)
OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode)
[root@ansible-server ~]# python -V
Python 2.7.15
[root@ansible-server ~]# python3 -V
Python 3.6.8
1.DataX安装部署
git clone https://github.com/alibaba/DataX.git
cd DataX
mvn -U clean package assembly:assembly -Dmaven.test.skip=true # maven打包
等待编译好久…
竟然编译了39分钟！！！
留个纪念：
[INFO] datax/lib/slf4j-api-1.7.10.jar already added, skipping
[INFO] datax/lib/logback-classic-1.0.13.jar already added, skipping
[INFO] datax/lib/logback-core-1.0.13.jar already added, skipping
[INFO] datax/lib/commons-math3-3.1.1.jar already added, skipping
[INFO] datax/lib/hamcrest-core-1.3.jar already added, skipping
[WARNING] Assembly file: /opt/DataX/target/datax is not a regular file (it may be a directory). It cannot be attached to the project build for installation or deployment.
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for datax-all 0.0.1-SNAPSHOT:
[INFO]
[INFO] datax-all .......................................... SUCCESS [03:23 min]
[INFO] datax-common ....................................... SUCCESS [ 22.458 s]
[INFO] datax-transformer .................................. SUCCESS [ 25.734 s]
[INFO] datax-core ......................................... SUCCESS [01:02 min]
[INFO] plugin-rdbms-util .................................. SUCCESS [ 20.741 s]
[INFO] mysqlreader ........................................ SUCCESS [ 1.096 s]
[INFO] drdsreader ......................................... SUCCESS [ 2.539 s]
[INFO] sqlserverreader .................................... SUCCESS [ 1.885 s]
[INFO] postgresqlreader ................................... SUCCESS [ 5.029 s]
[INFO] oraclereader ....................................... SUCCESS [ 1.047 s]
[INFO] odpsreader ......................................... SUCCESS [ 43.033 s]
[INFO] otsreader .......................................... SUCCESS [ 31.965 s]
[INFO] otsstreamreader .................................... SUCCESS [ 16.498 s]
[INFO] plugin-unstructured-storage-util ................... SUCCESS [03:08 min]
[INFO] txtfilereader ...................................... SUCCESS [ 5.172 s]
[INFO] hdfsreader ......................................... SUCCESS [06:13 min]
[INFO] streamreader ....................................... SUCCESS [ 1.028 s]
[INFO] ossreader .......................................... SUCCESS [ 12.157 s]
[INFO] ftpreader .......................................... SUCCESS [ 6.172 s]
[INFO] mongodbreader ...................................... SUCCESS [ 9.056 s]
[INFO] rdbmsreader ........................................ SUCCESS [ 1.186 s]
[INFO] hbase11xreader ..................................... SUCCESS [04:06 min]
[INFO] hbase094xreader .................................... SUCCESS [02:57 min]
[INFO] tsdbreader ......................................... SUCCESS [ 7.664 s]
[INFO] opentsdbreader ..................................... SUCCESS [02:45 min]
[INFO] cassandrareader .................................... SUCCESS [ 35.874 s]
[INFO] mysqlwriter ........................................ SUCCESS [ 0.861 s]
[INFO] drdswriter ......................................... SUCCESS [ 1.111 s]
[INFO] odpswriter ......................................... SUCCESS [ 1.895 s]
[INFO] txtfilewriter ...................................... SUCCESS [ 3.672 s]
[INFO] ftpwriter .......................................... SUCCESS [ 3.045 s]
[INFO] hdfswriter ......................................... SUCCESS [ 6.932 s]
[INFO] streamwriter ....................................... SUCCESS [ 0.863 s]
[INFO] otswriter .......................................... SUCCESS [ 1.609 s]
[INFO] oraclewriter ....................................... SUCCESS [ 1.247 s]
[INFO] sqlserverwriter .................................... SUCCESS [ 0.855 s]
[INFO] postgresqlwriter ................................... SUCCESS [ 1.073 s]
[INFO] osswriter .......................................... SUCCESS [ 3.064 s]
[INFO] mongodbwriter ...................................... SUCCESS [ 3.227 s]
[INFO] adswriter .......................................... SUCCESS [ 20.076 s]
[INFO] ocswriter .......................................... SUCCESS [ 37.687 s]
[INFO] rdbmswriter ........................................ SUCCESS [ 1.196 s]
[INFO] hbase11xwriter ..................................... SUCCESS [ 6.453 s]
[INFO] hbase094xwriter .................................... SUCCESS [ 4.315 s]
[INFO] hbase11xsqlwriter .................................. SUCCESS [03:24 min]
[INFO] hbase11xsqlreader .................................. SUCCESS [02:09 min]
[INFO] elasticsearchwriter ................................ SUCCESS [ 21.244 s]
[INFO] tsdbwriter ......................................... SUCCESS [ 1.477 s]
[INFO] adbpgwriter ........................................ SUCCESS [ 24.980 s]
[INFO] gdbwriter .......................................... SUCCESS [01:30 min]
[INFO] cassandrawriter .................................... SUCCESS [ 5.859 s]
[INFO] hbase20xsqlreader .................................. SUCCESS [02:00 min]
[INFO] hbase20xsqlwriter .................................. SUCCESS [ 1.659 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 39:28 min
[INFO] Finished at: 2019-12-12T14:39:51+08:00
[INFO] ------------------------------------------------------------------------
[root@ansible-server DataX]#
2.DataX使用/踩坑
1.配置一个简单例子
做什么好呢，正好手上有三个虚机absible-server client-1 client-2；
我们将absible-server mysql数据库test.user同步到client-1数据库test.user吧；
配置的任务是json格式的，我们假设任务的配置文件叫做mysql2mysql.json
需要用datax.py执行，看一眼datax.py就知道项目是python2的；
mysql2mysql.json位置在上一层目录job文件夹下存放；
1.如何跑任务呢：
python /opt/DataX/target/datax/datax/bin/datax.py /opt/DataX/target/datax/datax/job/mysql2mysql.json
成功的话会是这样的：
但是我相信你需要仔细看一下任务的json文件该如何去配置
2.配置文件格式说明：
可以看到job分为reader和writer两部分，正体现了datax的架构特征：
阿里云开源离线同步工具DataX3.0介绍
部分参数说明：
- jdbcUrl jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8
里面需要配置源IP/目标IP:数据库端口/数据库名?characterEncoding=utf8 控制编码格式，防止写入中文出现错误 - username 这个用户，需要在数据库中创建，并赋予其增删改查等权限
创建的可以用来读取主库/修改从库的用户，我直接使用的root用户，并且后面试错后给root用户【允许所有远程机器访问】的权限
参考MySQL用户授权（GRANT）
/opt/DataX/target/datax/datax/job/mysql2mysql.json ：
{
"job": {
"content": [
{
"reader": {
"name": "mysqlreader",
"parameter": {
"column": [
"id",
"name"
],
"connection": [
{
"jdbcUrl": ["jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8"],
"table": ["user"]
}
],
"password": "asdf",
"username": "root"
}
},
"writer": {
"name": "mysqlwriter",
"parameter": {
"column": [
"id",
"name"
],
"connection": [
{
"jdbcUrl": "jdbc:mysql://192.168.255.134:3306/test?characterEncoding=utf8",
"table": ["user"]
}
],
"password": "asdf",
"username": "root"
}
}
}
],
"setting": {
"speed": {
"channel": "1"
}
}
}
}
上面的文件配置完，就可以用datax.py跑这个json文件了，当然，我第一次跑，遇到了几处错误
3.跑任务出错与测试
1.Host ‘ansible-server’ is not allowed to connect to this MySQL server
原因：mysql服务器出于安全考虑，默认只允许本地登录数据库服务器
因此主服务器133不能用root访问从服务器数据库：
[root@ansible-server job]# mysql -h192.168.255.134 -uroot -p
Enter password:
ERROR 1130 (HY000): Host '192.168.255.133' is not allowed to connect to this MySQL server
从服务器将mysql的root用户的host从"localhost"改成"%"，允许所有远程端访问：
主服务器的root用户也作同样修改，进入mysql库，看下root的host，然后改成%，确认下：
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select host, user from user;
+-----------+---------------+
| host | user |
+-----------+---------------+
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+---------------+
3 rows in set (0.28 sec)
mysql> update user set host = '%' where user = 'root';
Query OK, 1 row affected (0.59 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.14 sec)
mysql> select host, user from user;
+-----------+---------------+
| host | user |
+-----------+---------------+
| % | root |
| localhost | mysql.session |
| localhost | mysql.sys |
+-----------+---------------+
3 rows in set (0.00 sec)
2.跑同步任务成功【但中文插入错误】
检查下有没有将主库的test.user表同步到从库134的test.user表：
出现了错误，将中文数据显示错误，jdbcurl末尾加上?characterEncoding=utf8
主库test.user表插入一条数据：
[root@ansible-server job]# python /opt/DataX/target/datax/datax/bin/datax.py /opt/DataX/target/datax/datax/job/mysql2mysql.json
DataX (DATAX-OPENSOURCE-3.0), From Alibaba !
Copyright (C) 2010-2017, Alibaba Group. All Rights Reserved.
2019-12-12 17:04:18.115 [main] INFO VMInfo - VMInfo# operatingSystem class => sun.management.OperatingSystemImpl
2019-12-12 17:04:18.122 [main] INFO Engine - the machine info =>
osInfo: Oracle Corporation 1.8 25.232-b09
jvmInfo: Linux amd64 3.10.0-957.27.2.el7.x86_64
cpu num: 4
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
2019-12-12 17:04:18.143 [main] INFO Engine -
{
"content":[
{
"reader":{
"name":"mysqlreader",
"parameter":{
"column":[
"id",
"name"
],
"connection":[
{
"jdbcUrl":[
"jdbc:mysql://127.0.0.1:3306/test"
],
"table":[
"user"
]
}
],
"password":"****",
"username":"root"
}
},
"writer":{
"name":"mysqlwriter",
"parameter":{
"column":[
"id",
"name"
],
"connection":[
{
"jdbcUrl":"jdbc:mysql://192.168.255.134:3306/test",
"table":[
"user"
]
}
],
"password":"****",
"username":"root"
}
}
}
],
"setting":{
"speed":{
"channel":"1"
}
}
}
2019-12-12 17:04:18.161 [main] WARN Engine - prioriy set to 0, because NumberFormatException, the value is: null
2019-12-12 17:04:18.163 [main] INFO PerfTrace - PerfTrace traceId=job_-1, isEnable=false, priority=0
2019-12-12 17:04:18.164 [main] INFO JobContainer - DataX jobContainer starts job.
2019-12-12 17:04:18.165 [main] INFO JobContainer - Set jobId = 0
2019-12-12 17:04:18.467 [job-0] INFO OriginalConfPretreatmentUtil - Available jdbcUrl:jdbc:mysql://127.0.0.1:3306/test?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true.
2019-12-12 17:04:18.484 [job-0] INFO OriginalConfPretreatmentUtil - table:[user] has columns:[id,name].
2019-12-12 17:04:18.930 [job-0] INFO OriginalConfPretreatmentUtil - table:[user] all columns:[
id,name
].
2019-12-12 17:04:18.967 [job-0] INFO OriginalConfPretreatmentUtil - Write data [
INSERT INTO %s (id,name) VALUES(?,?)
], which jdbcUrl like:[jdbc:mysql://192.168.255.134:3306/test?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true]
2019-12-12 17:04:18.967 [job-0] INFO JobContainer - jobContainer starts to do prepare ...
2019-12-12 17:04:18.968 [job-0] INFO JobContainer - DataX Reader.Job [mysqlreader] do prepare work .
2019-12-12 17:04:18.968 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do prepare work .
2019-12-12 17:04:18.968 [job-0] INFO JobContainer - jobContainer starts to do split ...
2019-12-12 17:04:18.969 [job-0] INFO JobContainer - Job set Channel-Number to 1 channels.
2019-12-12 17:04:18.973 [job-0] INFO JobContainer - DataX Reader.Job [mysqlreader] splits to [1] tasks.
2019-12-12 17:04:18.974 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] splits to [1] tasks.
2019-12-12 17:04:18.990 [job-0] INFO JobContainer - jobContainer starts to do schedule ...
2019-12-12 17:04:18.993 [job-0] INFO JobContainer - Scheduler starts [1] taskGroups.
2019-12-12 17:04:18.996 [job-0] INFO JobContainer - Running by standalone Mode.
2019-12-12 17:04:19.007 [taskGroup-0] INFO TaskGroupContainer - taskGroupId=[0] start [1] channels for [1] tasks.
2019-12-12 17:04:19.010 [taskGroup-0] INFO Channel - Channel set byte_speed_limit to -1, No bps activated.
2019-12-12 17:04:19.010 [taskGroup-0] INFO Channel - Channel set record_speed_limit to -1, No tps activated.
2019-12-12 17:04:19.019 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] attemptCount[1] is started
2019-12-12 17:04:19.024 [0-0-0-reader] INFO CommonRdbmsReader$Task - Begin to read record by Sql: [select id,name from user
] jdbcUrl:[jdbc:mysql://127.0.0.1:3306/test?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true].
2019-12-12 17:04:19.043 [0-0-0-reader] INFO CommonRdbmsReader$Task - Finished read record by Sql: [select id,name from user
] jdbcUrl:[jdbc:mysql://127.0.0.1:3306/test?yearIsDateType=false&zeroDateTimeBehavior=convertToNull&tinyInt1isBit=false&rewriteBatchedStatements=true].
2019-12-12 17:04:19.226 [0-0-0-writer] WARN CommonRdbmsWriter$Task - 回滚此次写入, 采用每次写入一行方式提交. 因为:Duplicate entry '1' for key 'PRIMARY'
2019-12-12 17:04:19.243 [0-0-0-writer] ERROR StdoutPluginCollector -
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'PRIMARY'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_232]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_232]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_232]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_232]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.Util.getInstance(Util.java:360) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:971) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2530) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1907) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1199) ~[mysql-connector-java-5.1.34.jar:5.1.34]
at com.alibaba.datax.plugin.rdbms.writer.CommonRdbmsWriter$Task.doOneInsert(CommonRdbmsWriter.java:382) [plugin-rdbms-util-0.0.1-SNAPSHOT.jar:na]
at com.alibaba.datax.plugin.rdbms.writer.CommonRdbmsWriter$Task.doBatchInsert(CommonRdbmsWriter.java:362) [plugin-rdbms-util-0.0.1-SNAPSHOT.jar:na]
at com.alibaba.datax.plugin.rdbms.writer.CommonRdbmsWriter$Task.startWriteWithConnection(CommonRdbmsWriter.java:297) [plugin-rdbms-util-0.0.1-SNAPSHOT.jar:na]
at com.alibaba.datax.plugin.rdbms.writer.CommonRdbmsWriter$Task.startWrite(CommonRdbmsWriter.java:319) [plugin-rdbms-util-0.0.1-SNAPSHOT.jar:na]
at com.alibaba.datax.plugin.writer.mysqlwriter.MysqlWriter$Task.startWrite(MysqlWriter.java:78) [mysqlwriter-0.0.1-SNAPSHOT.jar:na]
at com.alibaba.datax.core.taskgroup.runner.WriterRunner.run(WriterRunner.java:56) [datax-core-0.0.1-SNAPSHOT.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_232]
2019-12-12 17:04:19.246 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '1' for key 'PRIMARY'","record":[{"byteSize":1,"index":0,"rawData":1,"type":"LONG"},{"byteSize":3,"index":1,"rawData":"cad","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.257 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '8' for key 'PRIMARY'","record":[{"byteSize":1,"index":0,"rawData":8,"type":"LONG"},{"byteSize":3,"index":1,"rawData":"半同步","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.263 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '9' for key 'PRIMARY'","record":[{"byteSize":1,"index":0,"rawData":9,"type":"LONG"},{"byteSize":4,"index":1,"rawData":"影响性能","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.267 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '10' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":10,"type":"LONG"},{"byteSize":8,"index":1,"rawData":"数据量小没啥区别","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.270 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '11' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":11,"type":"LONG"},{"byteSize":4,"index":1,"rawData":"雨女无瓜","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.285 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '12' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":12,"type":"LONG"},{"byteSize":3,"index":1,"rawData":"马冬梅","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.289 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '13' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":13,"type":"LONG"},{"byteSize":4,"index":1,"rawData":"马什么梅","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.294 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '14' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":14,"type":"LONG"},{"byteSize":4,"index":1,"rawData":"马冬什么","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.297 [0-0-0-writer] ERROR StdoutPluginCollector - 脏数据:
{"exception":"Duplicate entry '15' for key 'PRIMARY'","record":[{"byteSize":2,"index":0,"rawData":15,"type":"LONG"},{"byteSize":4,"index":1,"rawData":"什么冬梅","type":"STRING"}],"type":"writer"}
2019-12-12 17:04:19.523 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] taskId[0] is successed, used[508]ms
2019-12-12 17:04:19.524 [taskGroup-0] INFO TaskGroupContainer - taskGroup[0] completed it's tasks.
2019-12-12 17:04:29.015 [job-0] INFO StandAloneJobContainerCommunicator - Total 11 records, 60 bytes | Speed 6B/s, 1 records/s | Error 10 records, 56 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00%
2019-12-12 17:04:29.016 [job-0] INFO AbstractScheduler - Scheduler accomplished all tasks.
2019-12-12 17:04:29.016 [job-0] INFO JobContainer - DataX Writer.Job [mysqlwriter] do post work.
2019-12-12 17:04:29.016 [job-0] INFO JobContainer - DataX Reader.Job [mysqlreader] do post work.
2019-12-12 17:04:29.016 [job-0] INFO JobContainer - DataX jobId [0] completed successfully.
2019-12-12 17:04:29.017 [job-0] INFO HookInvoker - No hook invoked, because base dir not exists or is a file: /opt/DataX/target/datax/datax/hook
2019-12-12 17:04:29.018 [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
2019-12-12 17:04:29.018 [job-0] INFO JobContainer - PerfTrace not enable!
2019-12-12 17:04:29.019 [job-0] INFO StandAloneJobContainerCommunicator - Total 11 records, 60 bytes | Speed 6B/s, 1 records/s | Error 10 records, 56 bytes | All Task WaitWriterTime 0.000s | All Task WaitReaderTime 0.000s | Percentage 100.00%
2019-12-12 17:04:29.020 [job-0] INFO JobContainer -
任务启动时刻 : 2019-12-12 17:04:18
任务结束时刻 : 2019-12-12 17:04:29
任务总计耗时 : 10s
任务平均流量 : 6B/s
记录写入速度 : 1rec/s
读出记录总数 : 11
读写失败总数 : 10
从库结果：
再次尝试：
但是之前错误的没有改正
相较于mysql自带的主从复制功能，这里阿里的DataX同步“主从库”不会因为数据不一致而直接同步不成功，IO线程挂掉，而是选择忽略，接着同步其他数据。蛮像Noteability软件的。
3.结合crontabs，使DataX可以配置定时任务
1.确保安装crontabs
yum install crontabs
# crontabs-1.11-6.20121102git.el7.noarch 已安装并且是最新版本
常用命令：
service crond start # 启服务
service crond stop # 停服务
service crond restart # 重启服务
service crond reload # 重载配置
service crond status # 查看服务状态
crontab -l # 查看当前用户的定时任务
2.如何创建crontab定时任务
我们在/opt/DataX/target/datax/datax/job下创建定时任务文件，因为是crontabs+datax，就叫做crondatax吧：
vim crondatax
30,31,32,33 19 * * * python /opt/DataX/target/datax/datax/bin/datax.py /opt/DataX/target/datax/datax/job/mysql2mysql.json >>/opt/DataX/target/datax/datax/job/log.`date +\%Y\%m\%d\%H\%M\%S` 2>&1
格式说明：参照下图，解释下上面的测试例子：19时的30,31,32,33分分别做一次这个任务python /opt/DataX/target/datax/datax/bin/datax.py /opt/DataX/target/datax/datax/job/mysql2mysql.json，然后将每次执行的日志记录下，下图的log.xxxx就是，内容不赘述，都成功了。
填写说明：再新建一个任务，就在crondatax文件换一行写入即可。
跑任务，看下有没有：
跑起來了，这主库加的一条：
还未刷新navicat：
刷新，数据已经同步进来了，【我手速太慢，截图】：
4.未来计划
深入使用mysql自带的主从同步功能，并注重了解边界；
结合更常见的场景去使用crontab+datax做定时异步任务，与前者作对比，争取多发现几个各自的特点；
我知乎搜下然后去实验
下面还有基于datax的web项目，我还没看，不过要是我们去开发，调用api实现前端设置对一些库的同步，备份，等操作；
碍于经验和眼光，我暂时没别的想法。
大家都知道 mysql有自带的主从同步功能，也是需要从库去建立连接，然后开启对二进制文件的IO和SQL线程
但是同步过程中若因为同步问题出错，IO线程挂掉，还要人工干预
阿里的datax牺牲了相较于mysql主从同步(半同步模式)实时性较高的优势，提高了同步的稳定性能，再与crontab定时工具灵魂相融合，将运维的数据备份、同步等任务变得个性化，完美化。