Hadoop HDFS Commands and MapReduce with Example: Step-by-Step Guide | Hadoop Tutorial | IvyProSchool

In this video, we will demonstrate the Hadoop ecosystem and deep dive into the core Hadoop commands, providing clear explanations and practical examples of how to interact with the Hadoop Distributed File System (HDFS) and manage your data effectively.

Next, we will explore MapReduce, a powerful programming model and algorithm that lies at the heart of Hadoop's data processing capabilities. You will learn how to execute MapReduce tasks to process and analyse vast amounts of data in a distributed manner, enabling parallel processing and maximising performance.

Throughout the tutorial, we will walk you through some commands and MapReduce tasks, breaking them down into easy-to-follow steps and explaining the underlying concepts along the way. By the end of this tutorial, you will have a solid understanding of Hadoop commands and MapReduce, empowering you to confidently tackle big data challenges and extract valuable insights from your datasets.

00:00:00 - Introduction
00:00:35 - Launch the hadoop cluster
00:01:26 - Check hadoop cluster from web browser
00:02:00 - Hdfs commands
00:03:04 - Upload a file into hdfs from local
00:04:07 - Upload a folder into hdfs from local
00:04:37 - Run a wordcount program in hadoop
00:05:49 - Java Heap Space Error solve
00:08:23 - copy a file from hdfs to local
00:09:45 - Conclusion

#hadooptutorial #mapreduce #dataengineering #hadoopcommands



Liked the video? Check out below more playlists on Data Science and Data Engineering learning tutorial, alumni interview experiences, live data science case studies,etc:

For more updates on courses and tips don’t forget to follow us on:

[AnkitYadav-up]

sir after running the jar file command i not able to create output file for wordcount it showing map 0% reduce 0% but after that it gave error for exception message '/tmp/hadoop-Ankit' is not recognized as internal or external command not able to found solution I searched it everywhere

[viswanathvankadara]

Hey, thanks a ton for your videos.

I tried to replicate what you did in this video, but I'm encountering this error when trying to execute wordcount

[2023-07-03 12:20:31.201]Container exited with a non-zero exit code 1. Last 4096 bytes of stderr :
'"C:\Program Files\Java\jdk-11.0.17"' is not recognized as an internal or external command,
operable program or batch file.

Not sure where exactly this is going wrong

[zarahassan]

The problem of Posix permission arrived in my case too, when i was using hadoop version 3.4.2, then i simply switched the version from 3.4 to 3.3.6, and guys everything worked smoothly.

[ApiiiitaaaaPakoooodaaaaaa]

i m recieveing posix permissions error
plx help, when i run the wordcount cmd

[prateektiwari]

sir this error showin up Unable to find 'resource-types.xml'.

[ChelseaMayen]

Hi, thank you for your tutorial! When I execute the wordcount program, it keeps getting stuck at Map job is 100%, but reduce job is 0%... I installed and configured hadoop from your previous video. Could you please help me with this?

[shahul]

where are the practice files
I couldn't find that
Thanks Good Job

[ardian]

Thank you so much, teacher. Please you can dedicated to teach more in Hadoop :) God bless you

[mamathagoolla]

Thank you so much sir.🙏
You entered commands in video is not clear sir. Can you please provide the screenshots of those in the description.

[ridazouga]

Hello sir when running mapreduce job it shows error with exception 'tmp/haddop-Rida' is not recognized as intern or extern command, i searched everywhere (stack overflow youtube ...) for solution but no hope

[yallayaswanth]

hey, when i try to run hdfs dfs -ls / command its not showing any tmp file, but my tmp file is creating in the c drive. and even when i check in utilities its not showing any tmp file.

[vksaisushmitha]

I have executed the wordcount successfully, but i am unable to see the application in the cluster, but the output is executed and successfully returned in hdfs path i gave.
what could be the missing element.

[rathnakumari]

Hi,
First of all thanks for your support.
I followed all the steps as mentioned.
And yes it is working.

But when I execute jps comment it is not returning anything.

Just returning to the comment prompt again with sbin.

Can you plz explain it why?

And my both localhosts are running

[SalmaBoudehane]

when i execute the hadoop jar command it show Exception in thread "main" 'posix:permissions' not supported as initial attribute. is there a solution

[-hw]

What could be the problem here: WARN datanode.DataNode: Exiting Datanode
INFO datanode.DataNode: SHUTDOWN_MSG: ?

[lokamanisowmya]

Sir till browse directory its opened but not able find the temp folder or create new folder

[yaswanthmarni]

when i run start-all.cmd, the namnode and datanode are not launched
please guide how to resolve this

[ParasKumar-fsvq]

Bro, when i am running the jps command its showing nothing, and also port 8088 is not running

[tyrakeech]

start-yarn.cmd command is not working. what should I do?

[lakshagajyothi]

Localhost namenode alone is not opening in browser.please help what to do