摘要:
在Spark中,Dataframe简直可以称为内存中的文本文件。 就像在电脑上直接操作txt、 csv、 json文件一样简单。 val sparkConf = new SparkConf().setAppName("df2db").setMaster("local[1]") val sc = ne 阅读全文
摘要:
I will just give the analogy with which I understand memory consistency models (or memory models, for short). It is inspired by Leslie Lamport's semin 阅读全文