Apache Spark 面试题与答案
Question: What is the significance of Spark's lineage graph (DAG)?Answer: Spark's lineage graph (DAG) is a directed acyclic graph that represents the sequence of transformations and actions on RDDs. It helps in recovering lost data in case of node failure.Example:
|
保存以便复习
收藏此条目、标记为困难题，或将其加入复习集合。
这有帮助吗？ 是 否
用户评价最有帮助的内容：
- What is the purpose of the Spark SQL module?
- Explain the difference between narrow and wide transformations in Spark.