Spark程序编译报错: [INFO] Compiling 2 source files to E:\Develop\IDEAWorkspace\spark\target\classes at 1567004370534[ERROR] E:\Develop\IDEAWorkspace\spark\src\main\scala\cn\itcast\wordCount\WordCount.scala:3: error: object apache is not a member of package
Lifetime-Based Memory Management for Distributed Data Processing Systems (Deca:Decompose and Analyze) 一.分布式数据处理系统像Spark.FLink中的优缺点: 1.优点: in-memory中可以通过缓存中间数据以及在shuffle buffer中组合和聚合数据最小化重复 计算和I/O花销来提升多阶段和迭代计算性能. 2.缺点: (1)会在堆中产生大量的长期生存的对象,因而产生很多GC,尤