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2020-08-14:数据任务的执行引擎用的哪些?
2020-11-06 21:55:00 【福大大架构师每日一题】
福哥答案2020-08-14:
最基础的是 crontab 定时任务。
考虑到分布式分片定时任务和高可用,可以用elastic-job这样的框架。但是这样的框架无法处理复杂的任务依赖关系。
大数据处理框架一般用的是DAG(有向无环图)工作流类调度系统,通过DAG图描述任务之间的复杂的依赖关系。在Spark作业调度系统中,就是基于DAG描述rdd之间的依赖关系。
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