Most viewed questions in Big Data Hadoop

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How to create Hive tables that can be partitioned Using HiveQL?

Hey, You can create a Hive table using ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
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462 views
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1 answer

What are the basic concepts for video data structure and processing?

1.  Make use of hadoop storm framework. ( ...READ MORE

Sep 7, 2018 in Big Data Hadoop by Frankie
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462 views
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How to create table in cassandra?

Hi@akhtar, To create table in cassandra, you have ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
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460 views
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Classes implementing InputFormat frequently

FileInputFormat : Base class for all file-based InputFormats Other ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Reshma
460 views
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Factorial function in Impala

There are two ways to do this: select ...READ MORE

Jun 7, 2019 in Big Data Hadoop by Reshma
460 views
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SQOOP Import command failure

Try this command where the student table ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Suri
459 views
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Hive ACID semantics

ACID stands for Atomicity, Consistency, Isolation, and Durability.  Until ...READ MORE

Jan 4, 2019 in Big Data Hadoop by Omkar
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459 views
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Where Big Data tools like Hadoop and Spark comes into picture when we talk about ETL?

When we talk about ETL, ETL means ...READ MORE

May 3, 2018 in Big Data Hadoop by nitinrawat895
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459 views
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Declaring separator in the MapReduce(Hadoop 0.20)

In the new API you have to ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
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458 views
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Differentiate between FileSink and FileRollSink

Hey, The major difference between HDFS FileSink and ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Gitika
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457 views
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How to set LDAP server in Hue?

You have to set the Hue server url ...READ MORE

May 28, 2019 in Big Data Hadoop by Kumar
454 views
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What does a Hadoop tester do?

Hadoop tester, like any other tester, has ...READ MORE

Nov 6, 2018 in Big Data Hadoop by Omkar
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454 views
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Hive: grant privileges on an object to a role

Use the GRANT <Privilege> statement to grant ...READ MORE

May 31, 2019 in Big Data Hadoop by Sooraj
451 views
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Hadoop: Reading and Writing Sequencefile using Apis?

public class SequenceFilesTest { @Test ...READ MORE

Nov 9, 2018 in Big Data Hadoop by Omkar
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451 views
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Why do we need the FOR EACH operation in Pig Scripts?

The operation FOREACH in Apache Pig is ...READ MORE

Apr 30, 2019 in Big Data Hadoop by Gitika
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450 views
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what are the commonly used Spark ecosystem?

Can someone mention what are the commonly ...READ MORE

Jul 2, 2019 in Big Data Hadoop by ranjan
449 views
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Why to check status in zookeper?

Hello, Status describes the metadata of a specified znode. ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
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449 views
0 votes
1 answer

How to create an objects using a keyword new?

Example import java.io._ class Point(val xc: Int, val yc: ...READ MORE

Nov 17, 2020 in Big Data Hadoop by Gitika
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448 views
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Command to initiate MapReduce which provide decent UI?

I am new to MapReduce and want ...READ MORE

Jun 14, 2019 in Big Data Hadoop by Rachna
447 views
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How to replicate task so that a task will be computed by two mappers? Or each task will be done twice.

i want replicate task of mapper but ...READ MORE

Aug 21, 2019 in Big Data Hadoop by dodo aly
446 views
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Allowing hue to connect to sentry service

If you have enabled Kerberos for the ...READ MORE

May 30, 2019 in Big Data Hadoop by Jimmy
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Hadoop with Python: How to use python to stop Hadoop tasktracker?

Here you go os.system('sudo -u hadoop bin/hadoop-daemon.sh stop ...READ MORE

Nov 16, 2018 in Big Data Hadoop by Omkar
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446 views
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Channel in Flume

 A transient store that receives the events ...READ MORE

Jul 17, 2018 in Big Data Hadoop by Ashish
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446 views
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How Hadoop scalabality linear or proportional depends on the number of nodes?

Hey, These jobs are often IO based not ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
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445 views
0 votes
1 answer

Relationship between Hadoop and Database

HDFS is a software framework designed for ...READ MORE

Jul 4, 2019 in Big Data Hadoop by ravikiran
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444 views
0 votes
1 answer

Query regarding Parquet File type conversion

Suppose I have the below parquet file ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Stuart
444 views
0 votes
1 answer

Deleting a directory with comma throwing an error

As comma is an escape sequence character, ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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442 views
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1 answer

Explain to me the difference between HadoopHDFS and HBase.

Let me explain the major differences between ...READ MORE

May 13, 2019 in Big Data Hadoop by ravikiran
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edited May 14, 2019 by Omkar 441 views
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Why Watch keyword is used in zookeeper?

Hey, Watches show a notification when the specified ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
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440 views
0 votes
1 answer

Hadoop Distribution Differences

The Yahoo distribution is a version of ...READ MORE

Feb 18, 2019 in Big Data Hadoop by Frankie
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440 views
0 votes
1 answer

what is big data concept

Big data refers to extremely large, and ...READ MORE

Feb 4, 2022 in Big Data Hadoop by CoolCoder
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438 views
0 votes
1 answer

Setting REST service in Hue

To be able to browse the znode, ...READ MORE

May 30, 2019 in Big Data Hadoop by Esha
437 views
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What is the motivation behind developing Hive?

Hey, I am learning Hive in a basic ...READ MORE

May 9, 2019 in Big Data Hadoop by dyna
436 views
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1 answer
0 votes
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what is big data concept

Big data refers to extremely large, and ...READ MORE

Feb 1, 2022 in Big Data Hadoop by CoolCoder
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433 views
0 votes
1 answer

I went to datadir/hdfs/nn/current but no folder called current

Hi@Wlssam, I am not able to understand your ...READ MORE

Sep 14, 2020 in Big Data Hadoop by MD
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433 views
0 votes
1 answer

How to create Scala Maps?

Maps can be created in different ways ...READ MORE

Nov 17, 2020 in Big Data Hadoop by Gitika
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432 views
0 votes
1 answer

Is StandBy NameNode a daemon?

StandBy NameNode is not a separate daemon. ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Raman
432 views
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Cloudera Managing and Compatibality

With more partners than any other Hadoop ...READ MORE

Aug 6, 2018 in Big Data Hadoop by kurt_cobain
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429 views
0 votes
1 answer

Mention Job Flow parameter in Oozie?

Hey, You can use this job flow parameter ...READ MORE

Jun 17, 2019 in Big Data Hadoop by Gitika
• 65,910 points
428 views
0 votes
1 answer

How Hadoop distributes block writes into HDFS?

So, what happens is the slave node ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
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428 views
0 votes
1 answer

What is Big Data?

Big data is a term that refers ...READ MORE

Nov 24, 2021 in Big Data Hadoop by Edureka
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426 views
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1 answer

What skills do I need to become Hadoop Admin?

You have heard it right. There is ...READ MORE

Nov 8, 2018 in Big Data Hadoop by anonymous
426 views
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What is the necessity of slave node in Oozie workflow?

Hey, A topology runs in a distributed manner, ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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422 views
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1 answer

HDFS usage for small files

Well, the HDFS works more reliably with ...READ MORE

Jun 12, 2018 in Big Data Hadoop by BigData_is_my_ex
422 views
0 votes
1 answer

What is Hadoop?

Hadoop is simply a free and open-source ...READ MORE

Nov 24, 2021 in Big Data Hadoop by Edureka
• 12,690 points
421 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
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420 views
0 votes
0 answers

Docker: Access a service on host from a container

Mar 26, 2018 in Big Data Hadoop by shubham
• 7,340 points
420 views
–1 vote
1 answer

How to start pyspark?

Follow these steps: First start hadoop daemons: cd $HADOOP_HOME/sbin ./start-all.sh Now ...READ MORE

Jan 3, 2019 in Big Data Hadoop by Omkar
• 69,230 points
418 views
+1 vote
1 answer

How to switch off Cloudera Manager Service?

First list the running services: chkconfig --list And then ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
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415 views