笔记

CM

http://hadoop01:7180/cmf

 

presto

http://192.168.88.80:8090/ui/

 

 

查询 hdfs是否有块缺失

[hadoop@hadoop01 ~]hdfs fsck / | egrep -v '^\.+$' | grep -v replica | grep -v Replica

 

修复块缺失

1、首先退出hdfs namenode safe mode

hadoop dfsadmin -safemode leave

2、修复hdfs丢失的块

  hadoop fsck /
  hdfs fsck  /  -delete //此方式会将丢失的块全部删除

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