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 /blockrecoverFound 1 items-rw-r-...

单独启动和关闭hadoop服务启动名称节点 ：hadoop-daemon.sh start namenode启动数据节点：hadoop-daemons.sh start datanode slave启动secondarynamenode：hadoop-daemon.sh start secondarynamenode启动resourcemanager：yarn-daemon.sh st...

1：架构原理2 block(块)解析块的大小128M 块的副本数3 <property> <name>dfs.blocksize</name> <value>134217728</value></property><property> <n

1.创建用户和上传hadoop软件：useradd hadoopsu - hadoop[hadoop@hadoop002 ~]$ mkdir app[hadoop@hadoop002 ~]$ cd app/[hadoop@hadoop002 ~]$ wget http://archive.cloudera.com/cdh5/cdh/5/hadoop-2.6.0-cdh5.7.0.tar....