Hadoop Tutorial: Intro to HDFS

[@nevmoveik36]

This is literally the best presentation ive ever seen regarless the subject of Computer Science. Thank you very much. Extremely helpful for my Big Data Uni exam

[@blueplasticvideos]

Hah, thanks for the kind words!

[@caryleedavisvideo]

Awesome Sameer. I'm a SQL BI Developer just starting to investigate Big Data. You have such a nice ability to make the complex seem simple. It's a real gift for any teacher. I appreciate it.

[@NareshKumar-cn9bf]

I must appreciate the clarity of the presentation. Thanks a lot Sameer !!!!!

[@SuperDilsan]

Crystal clear explanation about HDFS and about High Availability. Thank you so much for the presentation.

[@JohnHeitmuller]

Excellent, concise, overview of the HDFS component of Hadoop.

[@BigKens]

Great intro to Hadoop. This talk was specific enough to be informative and useful without information overload. The Yahoo example was a very interesting real-world example, also. Thanks very much!

[@AJAYGovindaram]

I really like the way you presented the information. It's easy to understand and analyse the contents you were talking about. I appreciate and thank you for the information.

[@kumarforsongs]

Excellent presentation Sameer. Very precise and up to the point.

[@TheJazzmaster777]

I agree this is certainly the best and professionally clean and detailed tutorial I have listened to. Thank you for simplicity and friendly knowledge sharing :)

[@Sengup]

Excellent Sameer. Greatly presented and wonderfully explained the concepts.

[@RobBates]

Excellent presentation, both content, pace, & delivery. Thanks!

[@Harshavardhan-hv8do]

Simple and easy way to understand for new learners. Thank you..

[@maddalam]

Thankyou Sameer, for this lucid yet insightful presentation. Just the right detail for any stater. Great job:)

[@jsidhu2832]

Really great video...specially because they charge £ 1200-2500 for this introduction and u did it for FREE!!!! Thank you !

[@WilliamGates888]

Thanks, the level of detail and clarity in this video was really good. Appreciate it!

[@nishantkalyankarr]

Thanks Sameer. Really wonderful. This video helped me to clearly understand the basics of HDFS. Keep posting such videos.

[@sudhamoksh8516]

Very Help full for Beginner, Eager to learn more on Hadoop,..........Thanks Sameer

[@michelletalluto49]

Sameer Great job on delivery of content and knowledge! One tip. when presenting stay to left or the right of the screen. Too much movement across the screen makes it difficult to follow what you 're saying as one may end up focusing on your constant moving back and forth.

[@fiddlefan5]

What a great presentation! Learned so much and for someone not in IT, you made it extremely understandable!

[@yundavadi]

Simple and excellent tutorial to get into basics of HDFS Thank you for sharing

[@CheewaphatL]

best tutorial till now

[@forexforex8889]

Very clear and helpful, will check out more of your presentations. Thanks Sameer.

[@meifan4917]

Excellent presentation, very clear and easy to understand.

[@paragkhadye8502]

Great explanation in a short amount of time to explain the fundamental concepts clearly

[@tinaareddy]

Totally awesome! I know everybody down there, have already said that , but I had to tell too! Super useful!! Thanks

[@PMestry007]

Nicely explained. Got the HDFS concept after watching this video. Thank you Sameer :-)

[@olulakun1]

New to Hadoop and watched this video the first time and completely understood the whole process and architecture behind it - great video, please let us know when you are going to do more of these.

[@timqi1616]

Great tutorial, step by step, clear and easy to understand!

[@akhtarmnnit]

awsome presentation...awsome presenter...He must be a developer turned consultant

[@washimrajaakash6262]

nice presentation.Read, write, blocking & distributing of files concept described is very good

[@pratapkudupudi]

Very nice presentation Sameer.. Excellent presentation deck and good flow of thought process

[@DonVaillancourt]

Thanks for the first intro. Lots to learn. Good job.

[@ramdasnarayanan3345]

excellent presentation, the slides especially related to storage on HDFS were really good.

[@lakshminarayanachowdary2575]

Thanks for very good explanation of Hadoop HDFS.. I really impressed with your way of presenting.. Hope to see more videos on different topic of HADOOP.. Thanks again sameer for your time in sharing great knowledge with us.. :)

[@ashikpanchangam3379]

Great tutorial with a simple explanation. Thanks a lot Sameer!

[@MortifiedU]

Great presentation.. Thank you very much for taking the time to explain this. Was a bit freaky in a capturing the audience kind of way when you did the disappearing act..

[@smcwai]

It is truly great presentation and indepth explanation in HDFS.

[@kylemarkwilliams]

This is a great talk. Very clear and descriptive. Thanks very much!

[@RockPT]

Great video! It really helped me understand what Hadoop is and how HDFS works!! Thumbs up!!

[@kerrsv]

Very clear. Smooth transition from general to detailed level. Thanks!

[@avinashrulz]

No need to stay at one place while giving presentation...you did gr8....

[@ramsimransingh550]

one of the best tutorial till now :) GOOD JOB Sameer :)

[@alexanderzhang7593]

very good tutorial , without indian accent

[@liying469]

only you care about accent

[@abhishekpareek1983]

hear hear! says someone who in general can't even say "thanks" that's even partially understandable!

[@klausdupont6335]

The video is a perfect illustration of how HDFS works. Thanks for your sharing :-)

[@vikashkumarsingh4822]

Very good presentation and explanation. Awesome Job. Thanks!!!!

[@blueplasticvideos]

Thanks for the feedback. Will try to stay more in place.

[@pokran123]

Neat & Clear Presentation. Good Job.

[@fuu812]

Great intro. Very clean presentation, thank you

[@blueplasticvideos]

Hi Max. Yes, the client connects directly to the DataNodes to get/put the blocks. However, before the client goes to the DN, it first goes to the NameNode to get a list of locations to write the block to (3 DNs). The NN is not in the read/write path as far as the block goes. Client just have to go to the NN to find out where to do the writes.

[@rss222ify]

Great presentation, hope to see more about Hadoop and HBase.

[@knowallgoodworks]

Thank you very much Sameer.. I am beginner for Hadoop .. I got an idea about HDFS..

[@vinayutube1000]

very good explanation. Lot of information in a just 33 mnts.

[@gopishivakrishna9707]

Fantastic presentation.. Very clear and cool. Good Job!!

[@rkb8379]

Gr8...stuff Sameer...it helped me understand and I believe it helps others too to begin with Hadoop ! Cheers...and Looking forward to other sessions from you

[@sutben]

Awesome. Bring clarity & connection from theoretical to codes. Next maybe automatic upload to HDFS rather than manual. Will tune for next Hadoop tutorial.

[@ChanduAndhe]

Great job on the presentation, very informative about the concept.

[@aartichugh5975]

Thanks a lot. Speaker have make concepts simple for the beginners. Excellent work.

[@satya.jaiswal]

Well designed. Clean and neat video. Thanks for sharing.

[@V7884542]

Awesome Video.Understood the concepts better and how really works in realtime. Thanks Sameer:-) Good Job

[@gomathynatarajan6739]

Excellent Overview, exactly what I was looking for. Thank you.

[@federicomoreno7165]

Great presentation Sameer, good job!

[@TechKnow88]

Really good introduction to the world of Hadoop. Thanks for this!

[@sankithas6494]

Good persentatation. Job well done! Keep it going, Sameer

[@dineshprasadgupta4625]

excellent! very impressive. Please share more on this series.

[@akhilnegi100]

Very Helpful for to start.Very Good presentation.thanks sameer

[@Hammett849]

Well delivered! definitely need more of these quality of presentations!

[@mohetaleel]

Good Job. Keep at it. Stay focused and I am sure we will be hearing about you in the future.

[@rahulagrawal5306]

Worth watching the video, indeed helpful ....Would like to see more technical details in this space .....

[@dosais]

cool presentation Sameer, hope you have a similar session on MR

[@luisnevarez812]

good Intro looking forward to other classes.

[@RashidOmar]

Insightful. We need more of these!

[@ANILMAHADEV]

Thank you very much Sameer for these videos! Great Introduction

[@ajaynarang7]

really really good presentation...precise and understandable

[@trent797]

Great video...very nice visuals and presentation style.

[@maverick-ind-17]

Really good presentation, HELPFUL!

[@SteveN-gt2ur]

Thank you very much, Sameer. Excellent tutorial! and you are talented

[@b39ctr]

I love your presentation that make me easy to understand, Thanks

[@MilanLamichhane]

Very nicely done. Thanks for a good explanation.

[@srinivaspithani7645]

Very well explained & to the point... it helped me.. thank you.

[@bhayz00]

Thank you very much for this video. I am new and still confused. Does anyone know any resources that differentiate between the 'big names'? (Hadoop, HBase, Cassandra, etc.) I'm looking for something that explains overlap in features and differences in use.

[@robind999]

Great presentation. learned so much from this.

[@afterworkguinness2452]

Best intro I've seen.

[@akparanta]

Great job explaining the basics!

[@acmsundar]

Really great job...Thank you so much for giving me this wonderful introduction to hdfs...

[@sjksingh]

very educational presentation and very well presented. Thank you!

[@EasonLiao13]

a very good video, clearly state the principle of the hadoop!

[@buildlackey]

Hey, Sameer - good presentation. And a quick point about you moving around, which someone criticized. I think you _should_ move a bit rather than standing like a wooden block. Especially when you are presenting to a room of people, if you stand in one place then some people won't see. If you move, they get a chance to see the slides. So, keep it moving. ;^) And tell Alex and Rooz that Chris Bedford said Hi.

[@simha1982]

Very nice presentation Sameer.

[@ten2the6]

Sir, that was an excellent presentation!

[@JustinHermann]

Great explanation and introduction!

[@woo-jinchokim6441]

this is it, this is exactly what I was looking for!

[@dave308ek92646]

Clear and concise, Thanks for your contribution.

[@JaradDeLorenzo]

That was an extremely well done introduction. I'll definitely be back for more knowledge =)

[@manjunathj1187]

Very simple and well presented!!

[@bharathks12]

a fantastic piece of work.. Love it ...

[@blueplasticvideos]

Hi bhayz00, that's not an easy question to answer in a comment. Hadoop (HDFS+MR) is just for batch analysis like doing full scans of your files. HBase and Cassandra are both column family databases for low latency (

[@aggelosg6224]

Very helpful tutorial! One question. How is it possible that i have less blocks than the number of files? Shouldn't every file break down to at least 1 block? Which means blocks >= total files?

[@rajasekhard8623]

Really awesome demo. It is more helpfull to understanding Hadoop concept. I have one question, when client reading the data from data nodes it will read the data parellely or sequentially? Thanks in advance.

[@ChandanVenkatesh]

awesome presentation! enlightened the HDFS Concept! thank you! :)

[@slvherliu7962]

the talk is great~ very clear about HDFS. Thank you for sharing !