question Re: Changing Namenode & DataNode directories in HDP 2.4.2 in Archives of Support Questions (Read Only)

Changing Namenode & DataNode directories in HDP 2.4.2

kaz_narasimhan — Wed, 31 Aug 2016 01:30:05 GMT

The Namenode & Datanode directories in HDFS default pointing to sda1(which has less space). I want to point the directories to sdb1 which has larger space. what is the procedure to change the Namenode & Datanode directories. As of now i do not have any data on HDFS so do not have problem of losing data while changing directories. Please let me know the steps. Below is the screen shot.

image.png

Re: Changing Namenode & DataNode directories in HDP 2.4.2

KuldeepK — Mon, 19 Aug 2019 10:00:52 GMT

@Narasimhan Kazhiyur

Login to Ambari UI --> Click on HDFS service --> Click on configs --> Search for data.dir --> Change the location --> Restart required services via Ambari

Please refer below screenshot

Please note - This procedure will not take care of data migration.

Re: Changing Namenode & DataNode directories in HDP 2.4.2

kaz_narasimhan — Wed, 31 Aug 2016 02:09:06 GMT

Hi @Kuldeep Kulkarni. In the datanode & namenode directories path i am giving "/mnt/resource/hadoop/hdfs/namenode & /mnt/resource/hadoop/hdfs/data" .Is this right ?

Please refer the attached screen shot of available partitions image.png.

Thank you.

Re: Changing Namenode & DataNode directories in HDP 2.4.2

nshetty — Wed, 31 Aug 2016 13:24:03 GMT

Hi @Narasimhan Kazhiyur

Yes above change should work and also you should format the new name directory