使用 DataX 增量同步数据

使用 DataX 做增量更新的一种方法， 希望对大家有用。

https://beginor.github.io/2018/06/29/incremental-sync-with-datax.html

有更好的方法，欢迎指正！

Read the linked article, incremental-sync-with-datax.html; the issue names no repository file, test, or entry point. First confirm whether maintainers want this external method turned into DataX documentation and define its target location and acceptance criteria; done would be an agreed, reviewed documentation update.

Written by the indexing model from the issue text.