zookeeper在hbase中的节点梳理

 


zookeeper在hbase中的利用梳理
相关的节点说明,
root-region-server:ROOT表所在的regionserver(HMaster查找root表并分配给一个NodeServer上后,注册在zookeeper上)
rs:子节点表示在线的region server(regionserver上线后,注册在rs下面)
draining:(HDFS currently has a way to exclude certain datanodes and prevent them from getting new blocks. HDFS goes one step further and even drains these nodes for you. This enhancement is a step in that direction.
The idea is that we mark nodes in zookeeper as draining nodes. This means that they don't get any more new regions. These draining nodes look exactly the same as the corresponding nodes in /rs, except they live under /draining.)
master:存储hmaster节点(Master启动后,注册在该节点中)
backup-masters:存储backup master节点(Backup master注册在该节点下)
shutdown:关闭的regionserver(关闭的失效的regionserver)
unassigned:子节点表示未分配的region(HMaster启动后,扫描HDFS中ROOT,META表,把所有的region放在这个节点下,待分配)
table:子节点表示表名称,内容表示表的状态,缓存表状态(如果无该表节点,表示未enabled的状态)
hbaseid:集群id
splitlog:http://blog.csdn.net/macyang/article/details/7744162(分布式split log,子节点是    所有的需要split的WAL日志文件,在region server中有woker线程领取任务《锁住》,对该文件进行拆分,按照region分组,拆分到HDFS中的regioninfo下)

 

 

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