王天一的博客

Yarn的调度 yarn的默认调度器 1：Apache hadoop2.x的默认调度器是Capacity Scheduler(计算调度器) 2：CDH的默认调度器是Fair Scheduler(公平调度器) Yarn三种调度策略对比 在Yarn中有三种调度器可以选择：FIFO Scheduler ，Capacity Scheduler，FairScheduler。 1：FIFO Scheduler...

测试文件 test.md 上传: -bash-4.2$ hdfs dfs -mkdir /blockrecover -bash-4.2$ echo "test" > test.md -bash-4.2$ hdfs dfs -put test.md /blockrecover -bash-4.2$ hdfs dfs -ls /blockrecover Found 1 items -rw-r-...

1.CDH启动/关闭 1.1启动CDH 1：先启动Mysql service mysql start 2：hadoop001再启动Server：/opt/cloudera-manager/cm-5.12.0/etc/init.d/cloudera-scm-server start 3：hadoop001-003再启动Agent:/opt//cloudera-manager/cm-5.12.0/et...