Seven, Hadoop cluster starts early experience
1. Start the way
you want to start a Hadoop cluster, you need to start and HDFS YARN two clusters.
Note: When you first start HDFS, you must format operation. Are some of the clean-up and essentially
preparatory work, because at this time of HDFS physically or non-existent.
hdfs namenode–format 或者 hadoop namenode –format
- Single node-by-start
- A key to start the script
2. Cluster web-ui
- NameNode http: // node01: 50070 /
- ResourceManager http://node02:8088/
3. Hadoop first experience
- HDFS use
- Running MapReduce programs