2019年9月3日
【Hadoop高级】Hadoop HA、hdfs安全模式
摘要： Hadoop HA Safemode（安全模式） During start up the NameNode loads the file system state from the fsimage and the edits log file. It then waits for DataNodes 阅读全文
posted @ 2019-09-03 20:35 BIG_BOSS_ZC 阅读(160) 评论(0) 推荐(0)
【Hadoop】namenode与secondarynamenode的checkpoint合并元数据
摘要： Checkpoint Node(检查点节点) NameNode persists its namespace using two files: fsimage, which is the latest checkpoint of the namespace and edits, a journal 阅读全文
posted @ 2019-09-03 11:44 BIG_BOSS_ZC 阅读(220) 评论(0) 推荐(0)