DataX增量抽取数据
项目地址：
https://github.com/WeiYe-Jing/datax-web
datax作业配置文件
datax.json
{
"job": {
"setting": {
"speed": {
"channel": 16
}
},
"content": [
{
"reader": {
"name": "mysqlreader",
"parameter": {
"splitPk": "id",
"username": "root",
"password": "root",
"column": [
"*"
],
"connection": [
{
"jdbcUrl": [
"jdbc:mysql://localhost:3306/test?characterEncoding=utf8"
],
"querySql": [
"select * from test_list where operationDate >= FROM_UNIXTIME(${lastTime}) and operationDate < FROM_UNIXTIME(${currentTime})"
]
}
]
}
},
"writer": {
"name": "mysqlwriter",
"parameter": {
"username": "root",
"password": "123456",
"column": [
"*"
],
"batchSize": "4096",
"connection": [
{
"jdbcUrl": "jdbc:mysql://localhost:3307/test?characterEncoding=utf8",
"table": [
"test_list"
]
}
]
}
}
}
]
}
}
- 增量时间字段：${lastTime}增量开始时间, 注意：定时任务启动之后，第一次的开始时间为页面输入时间，当任务执行成功后，该时间被更新为上一次的任务触发时间，任务失败不更新。${currentTime}任务的触发时间
- 拼接结果： -p "-DlastTime=1577009172 -DcurrentTime=1577023572"
- JVM启动参数拼接结果为： -j "-Xms2G -Xmx2G"
Demo
Datax启动命令
python datax.py -j "-Xms2G -Xmx2G" -p "-DlastTime=1577009172 -DcurrentTime=1577023572" datax.json
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