There is lot of homework done in any of your video. You just not come up with a any generic solution which could be applied, but actually the solutions which are currently being used in the company (be it twitter/Netflix). Kudos man, great work! :)

There is a lot of work done! You are amazing sir

I loved the way you keep the videos informative enough for the experienced to stay glued and simple enough for the beginners to understand. Great work Narendrea. Appreciate the way you are converting PAPERS to these great VIDEOS.

It is almost impractical to cover each and every aspect of all components that make up a system in a single video, unless it is several hours long. However, Naren does a great job in putting the most important information across in a way that is simple and easy to understand. He also makes sure he uses the exact keywords and terms that interested users can later research on for a more holistic view into every design. Thanks a ton!!

Your work is brilliant. You always include small details like "What is Fanout? Fanout is moving from a single point to different directions.". That level of detail is amazing because you are not taking things for granted (i.e. that everyone knows what a fanout is; I initially always got confused by the concept of fanout actually) it makes it much easier to grasp the material! Thanks!!!

When I research the design for a particular product, I watched at least 3 - 4 videos that explain it on KZfaq. And your is always the most complete and relevant. Great job! I think you can consider write a book about system design focusing on interview purpose.

He is doing fantastic job. Ton to learn from the videos.

Just saw the Wpp video from 2 months before this. And the difference is enormous kkkkkk. This video is much better. Good work and thank you for the video

This is a really detailed walk-through of newsfeed system design. Thanks!

I came here after clicking on an KZfaq recommendation video. I am so glad I got this channel through the recommended videos. I referred so many videos and your video was the best explanation I came across for System Design interview especially taking Twitter as an example. Thanks so much for your videos. Hats off !!! great job. Such an amazing explanation. I wish I had teacher like you!!! Thanks a lot.

Read "Grokking the System Design Interview" could not understand much and then came here, and everything made sense. Thank you Narendra for these great videos.

Absolutely love your work man. Gives so much more confidence when you mention what these companies are actually using. Highly, highly appreciated, thank you!

I am preparing for an interview of Amazon, and your video taught me a lot. Thanks and keep it coming!

Now I understand the importance of reading books. I remember this celebrity example was provided in the book name "Designing Data-Intensive Applications: The Big Ideas Behind Reliable, Scalable, and Maintainable Systems". Great Work. More power to you,

Narendra, I'm a big fan of your work. I want you to know that I really appreciate the time and effort that you've put into this. It has helped me a lot to improve my understanding of system design.

Best Twitter system design video I've seen so far.

Brilliant. Well done managing the details+clarity in 35 mins!

Thank you for posting design questions in such a fast pace. I really like your videos...Keep it coming :)

Thank you for explaining the overall system design in a such a clear, very easy to understand manner!!

I was truly amazed when i discovered your channel . Keep the good work mate!

This is so thorough and specific yet explained in a great way! Shows true mastery of the topic. Thank you very much for your work, really appreciated :D

I think for every video you must have read lot of articles , book and compile all the information and delivered in 40 Mins. Keep up the great Job Naren.

I will call you SIR. You are an amazing teacher. Best explanation.

Outstanding System Design video. I think this Twitter Design is more realistic than what other videos on the same topic show. Great work!

Best content so far I have come across in days. Really good!!

the best video on twitter system design I've ever seen before in my life

Keep Coming. Really appreciate the efforts you are taking to make such valuable source of Information.

I agree with the comment from Atul.K.Yadav. Great Job Narendra. You are exceptional in your explanation.

Great explanations! The only additional things that I learned from other videos (of lesser pedagogical quality): - Regional distribution of cached data (for Reddis) is done thanks to the Writer API (that writes the tweet in the primary region for Reddis + additional regions). - in order to have quick response times between the client and the Write API, the client actually talks to a queue; and the write API picks up messages from that queue.

Amazing !! 👍 Simple straight forward explanation, well structured in parts, well connected explained in a very nice clear voice. This is complete and comprehensive. I don't know of any video on these topics which comes anywhere near it. Great job man!! keep going !! You do us proud. 👍👍

On going through your lectures able to get horizontal approach on many new concepts . very good work. Thank you

Thanks Narendra....your videos are really useful. It is very difficult to get such system design explanation with so much details.

Thank you very much for the simplified explanation!! It cannot be any simpler than this.

There is lot of preparation that you do to come up with these videos. Excellent work!

Many thanks for making this video :-) You start from basic and go up to advanced concepts in very a easy to understand manner.

Great clarity in the explanation.. demystifies so nicely

Thank you also for mentioning the concepts involved (eventual consistency, gather & scatter, fan out, ifti)

Thank you for putting up this tutorial! Study vidoes like this and then practice at Meetapro with mock interviews will help you land multiple offers.

Told all my friends. You are doing a great job.

This was very clear and simple to understand. Thank you so much!

Your videos are jammed with so much useful knowledge... It's just wonderful... Big thanks

Hey man! Great work! Well explained! Love to see more coming from you!

fantastic work bro. You have scaled to a new level :)

very well explained, I could get every bit of the system and much better than many other videos on youtube.

One of the best videos of its own kind. Thank you!!

Great , You are helping the community a lot

I am still at 7:45 but have to say you are very good technically ! Thanks a ton !

The best video i have ever watched on twitter system design

Crystal clear system design. Thanks for your time and effort 👍

Thank you for your help, your videos are really very helpful in understanding the real life design system. Thanks much :)

Thanks Narendra! All your videos are nicely articulated and informative. I am a fan :)

Really like all of your videos. Thank you for doing the hard work and sharing your knowledge with the community.

Good job Naren. This design video is very well done

Thanks for spreading your knowledge man. Greetings from Egypt.

Awesome one, mate. Wonderful and neat explanation of such a large scale system. Thanks.

super introduction to the architecture! thank you

I am short of words .. Awesome stuff man !!

Fantastic Job Narendra...keep it up...your videos are really very informative and helps to understand core concept of system .Thanks

Thank u so much for such a detailed explanation of each important topic

very good compilation Naren, really like your videos as they are detailed and good quality :)

You are so amazing and knowledgeable!! Thanks for sharing these informative Videos!!

Bravo. This is one of the better system design videos.

@Naren L: Simply the best and smart. You have acquired such a great knowledge. Wow !!!

you are the gem master and your videos are gems

Amazing work, crystal clear concepts. Thank you!

Very happy to see you pasted design diagram image too.. (y)

Hey, Thank you so much all your knowledge sharing. I am able to perform very nice in all my interviews. Keep up the good work. More power to you. Keep rocking!!!

Simply awesome. Keep up good work.

I nailed Amazon system design interview question by watching your videos. Just wanted to say thank you and thank you.

You're a great tutor. Keep up a good work!

This is an amazing video! extremely detailed & well designed... Thank you for this... (Subscribed!)

Nice, methodical approach

Thank you Narendra, your videos really helpful

Small nit pick, you want to reverse the order of your redis keys. +- is less efficient than -, think of redis keys as multi-column indices, if you put the random id in front your you effectively double the binary search time. The way you have it the order of your keys might looks like Current Redis --------------------- 123-user 124-tweet 125-tweet 126-user Should Be ---------------- tweet-124 tweet-125 user-123 user-126 If the ratio of tweets to users is not 1:1 you will increase the user lookup time by a factor of the ratio

I've seen so many system design videos and your's are the best. You know your stuff, you keep it to the point, go deep and overall really helpful. Awesome job and many thanks for all your work. A single video cannot cover everything but I would have liked to see how twitter shards users in this design.

I am gonna wish you teachers day forever . Thanks for awesome tutorial :)

awesome description Naren .

Well explained with impressive attitude 😉 We're not curious but more eagerly watching how you are doing and finally you done it..😁 Thanks much bro 👊 for your effort and efficiency....😊 Please make more videos and spread your wisdom.. so early you gonna crossing in millions subscriber..... Congrats in advance 💐

This was amazing

God bless you my friend.

Very good explanation. Extremely informative. Thank you :)

Excellent and thorough explanation!

Great video, thanks for the simple and clear explanation of concepts

The great information on twitter architecture....Keep up the good work.

This gave me a huge insight, thank you.

Redis itself has its own zookeeper called "Redis Sentinel" which monitors the redis nodes and if any node is down it will make the another node master.. the selection of the node is based on the priority of the nodes specified with in the redis.conf..

awesome video man ... ! this is relevant to any social media platform design like FB , Linkedin , Instagram.

Great presentation...Thanks..

very good video. Nicely covered all the topics. Thanks

Amazing Man! instantly subscribed. Godspeed to you.

Great presentation, thanks!

learned a ton❤️ and btw your blue bird drawing is the best lol

Thanks a lot for explaining it very clearly....

This system design is really awesome.... i super like it :D it gives me a lot inspiration of designing app like instagram :D thank you!

Amazing Video.....Nice and simple explanation.

Hi Naren.... Nice and really informative videos !!! Would request you to put videos for 1) Travel Sites like makemytrip 2) Stock Exchange sites like : Dowjones , Sharekhan 3) Banking Sites - Barclays,ICICI.

Amazing job! It helped me learn a good deal.

Great video! Thank you!

you are great bro.. awesome video. thanks for helping out.

Great job. Please continue your work.