Twitter system design | twitter Software architecture | twitter interview questions

Learn how to design Twitter and Prep for the system design interviews.
system design diagram: imgur.com/6TFkVL2
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[@atulyadav21j]

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! :)

[@TechDummiesNarendraL]

Thanks @Atul :)

[@mooa6554]

@@TechDummiesNarendraL Thanks for your videos. Just wanted to know how can we be sure this is the technical stack used in the companies? Any checks you made with the developers of those company?

[@terigopula]

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.

[@alexeyovriakh2450]

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!!!

[@hnasr]

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

[@ramendu2812]

Aaayee captain! Nice to see you here, your content is awesome as well. Fun fact, I listen to your podcast on Spotify daily while evening walks :D

[@deepakzworld]

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!!

[@chhltq]

When I research the design for a particular product, I watched at least 3 - 4 videos that explain it on KZbin. 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.

[@amith89rm]

I came here after clicking on an KZbin 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.

[@renon3359]

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.

[@vercorrobers2278]

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

[@moviesandchill7869]

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

[@leonemax6972]

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

[@mahesh23343]

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

[@goodbyetube9545]

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

[@philipg.5316]

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

[@schenschen-xf2ub]

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

[@Rekha-pk1ut]

Shen Chen please help me too.. Am. Also preparing for same

[@adistutorials5399]

Rekha Mor good luck!

[@sagarjaiswal8131]

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

[@ajaycj6449]

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

[@kumar16pawan]

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,

[@mattleahy3951]

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.

[@logicboard7746]

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

[@jlecampana]

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

[@aplbep]

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

[@balajibala2607]

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.

[@navsmail]

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

[@raisshaikh2105]

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

[@prasadpulaguntla9255]

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

[@clarencegomes6076]

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

[@sanjaysrivastava1100]

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. 👍👍

[@nehamahajan181]

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

[@rkd9915]

Good job Naren. This design video is very well done

[@ankurkesar]

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

[@avvarisaiabhinav2751]

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

[@navpreetkaur4902]

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

[@flamesdestroy5935]

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

[@chankibiswas532]

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

[@MuhammadIrshadAli]

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

[@jamess5330]

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.

[@akshaywahi3214]

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

[@zoasonafan1419]

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

[@galeop]

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.

[@gsb22]

links to those videos?

[@RS-vu5um]

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

[@erikadsouza5207]

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

[@hkshetty]

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

[@prashantkhisti9617]

Great clarity in the explanation.. demystifies so nicely

[@pallavisingh1673]

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

[@hemantyadav5034]

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

[@ss53210]

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

[@ghanshyam014]

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 💐

[@prashantponnala7570]

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.

[@TechDummiesNarendraL]

@Prashant thanks, Yes Thats the problem. with my day job I dont have much time to make it a series of videos explaining everything / cover every bits and pieces so i keep it simple and important points only.

[@dharmendrabhojwani]

@@TechDummiesNarendraL Nice videos. Now extend them in details please for each component. Would help a lot to everyone. Again Thanks for everything.

[@Rupesh209]

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

[@abhilashsulibela1414]

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

[@ujagarlamudi]

Amazing work, crystal clear concepts. Thank you!

[@sumankumar5126]

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

[@rewapatilokendra6291]

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

[@mayurijain5029]

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

[@shreejitnair2174]

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

[@bhupindermanhas1679]

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

[@hanibaro790]

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

[@ravitiwari2160]

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!!!

[@devqikGaming]

Thanks for spreading your knowledge man. Greetings from Egypt.

[@LevKozlodoev]

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

[@life-is-cat]

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

[@krakwal]

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

[@crankerson]

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

[@ibrahimshaikh3642]

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

[@deepgsingh]

Great , You are helping the community a lot

[@utkarshtripathi2349]

The best video i have ever watched on twitter system design

[@babulbhanu8213]

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

[@samirav608]

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

[@xolanimaphumulo6820]

Amazing video , I like how you explained the fanout concept and how you explained that some of the daemon processes are delegated to streaming technologies like kafka. Would you recommend for a start-up that is trying to save on hosting , to use background jobs/workers instead of using Kafka or Apache Storm?

[@VenkeeN17]

Very good explanation. Extremely informative. Thank you :)

[@srinivasanvk57]

very good video. Nicely covered all the topics. Thanks

[@akshayrana3840]

you are the gem master and your videos are gems

[@shivaprasad.v.g7526]

awesome description Naren .

[@dankokozar]

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

[@MrThepratik]

Really great video, in the upcoming ones could you spend some time explaining the intuition behind coming up with capacity & traffic estimates.

[@samgeorge3817]

super introduction to the architecture! thank you

[@vatsalagrawal4102]

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

[@ketansomvanshi3522]

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

[@abhijeetkumar3569]

Hey Narendra, It's really a great explanation and it couldn't be more better. Also this makes perfect sense to me. The problem which I'm facing right now is with microservice architecture. I mean if the same has to be designed in a proper microservice architecture, how we are going to do that? Like in this case the same Redis cluster is shared across different services, which means tight coupling. I would be really thankful if you make a system design video of any system by following microservice architecture. I mean each module will have a context bound and data ownership. And if you already have any video available for the same, please point me to that. Thank you, keep up the great work!

[@adilahmed4199]

Amazing Man! instantly subscribed. Godspeed to you.

[@mukeshbarman]

Hi Naren, do you have any suggestion for a book/reading materials for learning high level design. What I am looking for is a systematic approach towards designing and basic principles listed down somewhere. Great videos though. keep doing them.

[@sukhdevcrazy]

Simply awesome. Keep up good work.

[@KailashSharma-zv6lh]

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

[@hiteshbitscs]

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

[@nandhakumarkr3147]

Thank you Narendra, your videos really helpful

[@SPeri6]

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

[@ChitrankDixit]

very nice video, I regularly watch your videos for system designing or preparing myself for system design interviews. I also want to know what resource is best to understand the system design trends over the years. can you suggest some website or resource where we can find them.

[@kumarmayank8832]

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.

[@prashanttanksali5247]

Hi Narendra, Really liked your video in which you have made things very clear. Just one question about the choice of the Database - why did you choose Cassandra over opther options like mongodb aur a graph database (which sounds like a good option for a social networking website)?

[@supunkavinda8660]

keep it up bro. this is the nice video with very good explanation

[@jamessunderland9284]

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

[@BikasKatwalK]

In Redis is it hash-based lookup from K-V pair or does it use the binary search to find the cache names?

[@jamessunderland9284]

Bikas Katwal that’s a good point. Redis runs in memory, any kv store that uses disk behind the scenes is usually using b-trees

[@f.pulido440]

This gave me a huge insight, thank you.

[@nuclearpsyche]

Excellent and thorough explanation!

[@rockdrigomartineza]

Amazing videos! Congrats! One suggestion could be to use a different microphone to reduce echo and noise and make your voice more clear since for me it seems that every word you say is important! Keep the good work!

[@prathmeshmaurya5776]

Thanks for all the hard work that you put in creating such quality content. I have a request, can you suggest me some reference to resource explaining the system design of Facebook's like system and how to find the number of viewers of a video stream in real time. Thank You.

[@omi4508]

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

[@user-oy4kf5wr8l]

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!

[@yuvinal]

Great job. Please continue your work.

[@vin0summers]

Amazing job! It helped me learn a good deal.