c语言sscanf函数的用法是什么
232
2022-11-19
Hadoop
2)启动集群
(a)启动前必须保证namenode和datanode已经启动
(b)启动resourcemanager
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start resourcemanager
(c)启动nodemanager
[atguigu@hadoop101 hadoop-2.7.2]$ sbin/yarn-daemon.sh start nodemanager
(3)集群操作
(a)yarn的浏览器页面查看
"mycats"="/opt/modules/mycat/bin/mycat status"alias "mycatstop"="/opt/modules/mycat/bin/mycat stop"alias "hive"="/opt/modules/hive/bin/hive"alias "namenode"="/opt/modules/hadoop-2.7.2/sbin/hadoop-daemon.sh start namenode"alias "datanode"="/opt/modules/hadoop-2.7.2/sbin/hadoop-daemon.sh start datanode"alias "resourcemanager"="/opt/modules/hadoop-2.7.2/sbin/yarn-daemon.sh start resourcemanager"alias "nodemanager"="/opt/modules/hadoop-2.7.2/sbin/yarn-daemon.sh start nodemanager"alias "hadoop"="namenode ; datanode;nodemanager"alias "dates"="date '+%Y-%m-%d %H:%M:%S' "alias "dates"="ntpdate cn.pool.ntp.org ;ntpdate ntp1.aliyun.com ; date '+%Y-%m-%d %H:%M:%S' "
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