Most answered questions in Big Data Hadoop

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1 answer

Use of Describe keyword in HBase?

Hey, The describe command returns the description of ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 641 views
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1 answer

Command to listing all the tables In HBase?

Hey, list is the command that is used ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,687 views
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How to create a Table using HBase shell ?

Hey, You can create a table using the create command, ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,211 views
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1 answer

How to access HBase shell and navigate and navigate to the HBase home folder?

Hey, To access the HBase shell, you have ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,086 views
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1 answer

How to set communicate between Hbase with Java Libraries ?

Hey, We can also communicate with HBase using ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,064 views
0 votes
1 answer

How do you start and stop region server in HBase?

Hey, You can run multiple region servers from ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,341 views
0 votes
1 answer

How to kill a Backup Master in HBase?

Hey, To kill a backup master, you need ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,568 views
0 votes
1 answer

How to start and stop Master in HBase?

Hello, Using the “local-master-backup.sh” you can start up ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 862 views
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1 answer

Which code do we use to open the connection in HBase?

Hey, To open a connection, following code: Configuartion myconf ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,408 views
0 votes
1 answer

Map-reduce code for finding average salary

You can choose your mapper output key ...READ MORE

May 22, 2019 in Big Data Hadoop by Yogi
 • 3,875 views
0 votes
1 answer

Hive: LOCATION and WITH DBPROPERTIES command in create table command

By default, the Hive database will be ...READ MORE

May 22, 2019 in Big Data Hadoop by Firoz
 • 4,263 views
0 votes
1 answer

OOZIE Connectivity: "Unable to Connect"

You have to run the start command ...READ MORE

May 22, 2019 in Big Data Hadoop by Quil
 • 951 views
0 votes
1 answer

Unable to run Name node and datanode on Single Node cluster: Does not contain a valid host:port

Add the following properties in the core-site.xml file, it ...READ MORE

May 22, 2019 in Big Data Hadoop by Sanam
 • 1,455 views
0 votes
1 answer

Query regarding Temporary table's metadata in HIVE

Registered tables are not cached in memory. ...READ MORE

May 22, 2019 in Big Data Hadoop by Tina
 • 1,600 views
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1 answer

Sqoop error while trying to connect to MySql

Please use the below command to solve ...READ MORE

May 22, 2019 in Big Data Hadoop by Bhagavath
 • 2,782 views
0 votes
1 answer

Hadoop version problem: System is launching different version of Hadoop

When you run sudo service hadoop-master command, it internally runs ...READ MORE

May 22, 2019 in Big Data Hadoop by Tina
 • 626 views
0 votes
1 answer

Hadoop Namenode start issue

Try restarting the master: $ sudo reboot $ sudo ...READ MORE

May 22, 2019 in Big Data Hadoop by Rishi
 • 933 views
0 votes
1 answer

Should the region server be located on all DataNodes?

Hey, Absolute Yes, because Region server runs on ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,789 views
0 votes
1 answer

How will you backup an HBase cluster?

Hey, In 2 ways we can perform HBase ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,645 views
0 votes
1 answer

What do you understand by Filters in Hbase?

 Hey, Basically,  by allowing users to add limiting ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 909 views
+1 vote
1 answer

Hello all! I try to install hadoop but I have a problem when trying to format data folder with command "hdfs namenode -format". Error: Could not find or load main class Username

Hey! The error seems like the problem is ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,361 views
0 votes
1 answer

Hive: Execute MapReduce jobs locally

You can set Hive to run MapReduce ...READ MORE

May 21, 2019 in Big Data Hadoop by Gani
 • 1,517 views
0 votes
1 answer

How many files can hive create in HDFS duringbMapReduce job?

There is a limit on how many ...READ MORE

May 21, 2019 in Big Data Hadoop by Charuni
 • 1,393 views
0 votes
1 answer

How to set maximum dynamic partitions in MapReduce mode?

There is a default maximum number of ...READ MORE

May 21, 2019 in Big Data Hadoop by Likith
 • 1,499 views
0 votes
1 answer

Hive: Dynamic partition without using static partition

Hive asks for a static partition as ...READ MORE

May 21, 2019 in Big Data Hadoop by Suman
 • 1,268 views
0 votes
1 answer

Disable dynamic partition in hive

Dynamic partition is set to true by ...READ MORE

May 21, 2019 in Big Data Hadoop by Vishwa
 • 2,252 views
0 votes
1 answer

Replace Column names and datatype in Hive

You can replace the column name and ...READ MORE

May 21, 2019 in Big Data Hadoop by John
 • 29,815 views
0 votes
1 answer

Can I use pattern matching in Hive?

Yes, it is possible to use pattern ...READ MORE

May 21, 2019 in Big Data Hadoop by Khan
 • 1,568 views
0 votes
1 answer

Hive: Display logs on console

You can emit the logs on the ...READ MORE

May 21, 2019 in Big Data Hadoop by Jishnu
 • 2,091 views
0 votes
1 answer

How to loacte data cell in Hbase?

Hey, Hbase uses the coordinates to locate a ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 828 views
0 votes
1 answer

What are different types of blocks in Hbase?

Hey, Block is a single smallest amount / ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 776 views
0 votes
1 answer

Explain the Data Model operation in Hbase?

Hi, The Data Model operations in Hbase are ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 732 views
0 votes
1 answer

What are the components of Hbase?

Hey, Components of Hbase are as follows: Zookeeper:- It ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 643 views
0 votes
1 answer

What is REST keyword in Hbase?

Hey, REST stands for Representational State transfer, which ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 774 views
0 votes
1 answer

What is the use of ZooKeeper in Hbase?

Hey, The zookeeper is used to maintain the ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,305 views
0 votes
1 answer

What is Memstore in Hbase?

Hey, In HBase the the store contains memory ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,005 views
0 votes
1 answer

What are the operational commands of HBase?

Hey, These are the following operational commands: Get- Returns ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,770 points
edited May 21, 2019 by Gitika • 1,130 views
0 votes
1 answer

How to increase reducers in Hive?

By default, only one reducer is assigned ...READ MORE

May 21, 2019 in Big Data Hadoop by Lohit
 • 3,238 views
0 votes
1 answer

what is Region keyword and and store keyword in Hbase?

Hey, In HBase, tables are split into regions ...READ MORE

May 20, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 901 views
0 votes
1 answer

Application of Hbase?

Hey, Here are the following applications as follows: HBase is ...READ MORE

May 20, 2019 in Big Data Hadoop by Gitika
 • 65,770 points
edited May 20, 2019 by Gitika • 998 views
0 votes
1 answer

Hive: How to compress intermediate jobs?

The option hive.exec.compress.output will only compress the output. To ...READ MORE

May 20, 2019 in Big Data Hadoop by Raman
 • 1,244 views
0 votes
1 answer

How to compress output of the mapreduce output in Hive?

To compress the output of the MapReduce ...READ MORE

May 20, 2019 in Big Data Hadoop by Hiran
 • 1,337 views
0 votes
1 answer

Hive: Change data format for DDL output

By default, the DDL output is set ...READ MORE

May 20, 2019 in Big Data Hadoop by Karan
 • 1,419 views
0 votes
1 answer

Why HBase is column oriented database?

Hey, Yes, Hbase is known to be a ...READ MORE

May 20, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,846 views
0 votes
1 answer

How to change the Hive table comment?

Yes, it is possible to change the ...READ MORE

May 20, 2019 in Big Data Hadoop by Tina
 • 3,404 views
0 votes
1 answer

How to replace Hive table name?

Yes, it is possible to change the ...READ MORE

May 20, 2019 in Big Data Hadoop by Firoz
 • 1,099 views
0 votes
1 answer

How to find the default database in Hive?

Yes, you can find out which database ...READ MORE

May 20, 2019 in Big Data Hadoop by Shiro
 • 5,045 views
0 votes
1 answer

Hive: "SET LOCATION" command not changing the location of the database

The SET LOCATION command does not change ...READ MORE

May 20, 2019 in Big Data Hadoop by Yash
 • 3,543 views
0 votes
1 answer

Hive: Dropping a not empty database

This behavior is because Hive by default ...READ MORE

May 20, 2019 in Big Data Hadoop by Rakshit
 • 2,997 views
0 votes
1 answer

How to create a Hive Database and store it in HDFS?

You will have to exclusively mention the ...READ MORE

May 20, 2019 in Big Data Hadoop by Jishnu
 • 2,779 views
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