week4的  week5Hadoop介绍起源：Hadoopasasolution:Buildingblocks:Namenodeifothernodesfail:DataNode:Block1SecondaryNamenode:JobTracker：iffails：TopolosyclusterPig：Hive:PIGweek10week13：

下个星期的quiz答案：Eric；socialscience；laptop；Heemailsthelastversionofhisdocumenttohimself.；词汇需要自己看视频进行总结compact==micro,mini,tiny,light,small,….前缀：后缀：IT词汇；课上提问(自己提前准备，还没结束，结束了)：课上提问(