Shulou(Shulou.com)06/02 Report--

Hadoop configuration HA (NN)

For configuration information, please refer to the hadoop configuration name node HA principle.

1. Stop all processes

Stop-dfs.sh

2. Configure hdfs-site.xml and core-site.xml

3. Send the id_rsa of s201 to S205 (make sure that two NN can be ssh to each DN at the same time)

4. Copy the working directory of s201 to S205

5. Start the service journalnode

Hadoop-daemons.sh start journalnode

6. Initialize journalnode

Hdfs namenode-initializeShareEdits / / generate working directory

7. Format the file system and start the service

Hdfs namenode-format / / must be formatted on the premise of starting journalnode to copy the working directory of s201 to S205

Start-dfs.sh

8. Activate NN (only one NN is active and the other is standby)

Hdfs haadmin-transitionToActive nn1

9. Check NN status through WebUI

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.