How to format a Hadoop Master Node

0 votes

Hi Guys,

I am new in Hadoop technology. I have configured the hadoop namenode. But how to format the namenode?

Sep 20, 2020 in Big Data Hadoop by akhtar
• 38,170 points
78 views

1 answer to this question.

0 votes

Hi@akhtar,

To start the Hadoop NameNode, you need to format the node first. Otherwise, the NameNode service will not start. You can use the below command to format your NameNode.

$ hadoop namenode -format
answered Sep 20, 2020 by MD
• 95,060 points

Related Questions In Big Data Hadoop

0 votes
1 answer

How to install and configure a multi-node Hadoop cluster?

I would recommend you to install Cent ...READ MORE

answered Mar 21, 2018 in Big Data Hadoop by Shubham
• 13,480 points
1,219 views
0 votes
7 answers

How to run a jar file in hadoop?

I used this command to run my ...READ MORE

answered Dec 10, 2018 in Big Data Hadoop by Dasinto
13,877 views
0 votes
1 answer

How to delete a directory from Hadoop cluster which is having comma(,) in its name?

Just try the following command: hadoop fs -rm ...READ MORE

answered May 7, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
936 views
0 votes
1 answer

What is the command to find the free space in HDFS?

You can use dfsadmin which runs a ...READ MORE

answered Apr 29, 2018 in Big Data Hadoop by Shubham
• 13,480 points
768 views
0 votes
1 answer

How to find the used cache in HDFS

hdfs dfsadmin -report This command tells fs ...READ MORE

answered May 4, 2018 in Big Data Hadoop by Shubham
• 13,480 points
865 views
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
6,854 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
1,098 views
0 votes
1 answer

How to create a group in Hadoop?

Hi@akhtar, Generally, to create a group in the ...READ MORE

answered Oct 1, 2020 in Big Data Hadoop by MD
• 95,060 points
65 views
0 votes
1 answer

How to find the number of blocks for a file in Hadoop?

Hi@akhtar, You can use Hadoop file system command to ...READ MORE

answered Oct 13, 2020 in Big Data Hadoop by MD
• 95,060 points
273 views