第一部分核心设计篇第1章HDFS的数据存储………….......………………………………………········…........21.1HDFS内存存储...............…············································…….................….........................21.1.lHDFS内存存储原理..................….........……......…………………………………21.1.2Linux虚拟内存盘........………………………………………………………………………………41.1