Hadoop- HDFS的API操作
1、引入依赖 <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</arti...
Hadoop- HDFS的Safemode
Hadoop- HDFS的Safemode hadoop启动时，NameNode启动完后就开始进入安全模式，等待DataNode向NameNode发送block report ，当data...