System Design Interviews : Whatsapp | Facebook Messenger | Chat systems

In this video, I have talked about whatsapp system design and will be helpful for interviews. I have discussed about below use cases. At the end there is a discussion about Scaling strategies Authentication One to one Message, is user Online, Send receipt, Read receipt etc. Group messaging Multimedia messaging images and video offline messaging. Also, below key points are explained in detail and is a valuable addition for the system design interviews. Database : Use Hbase/Hadoop, No RDBMS like mySQL Long polling or Websockets : Websockets Message sequencing : Need the time stamp for all the messages. Db optimize : Cache server can be introduced. Load balancer : a) if multiple caches are there 2) we can have LB between client and server for scaling and distributing the traffic. Whatsapp System Design followup interview question with answers are in below link    • Whatsapp System Design followup interview ...   Other interesting System design links AirBnB and Booking.com System design:    • System Design : Airbnb | Booking.com onlin...   Content Delivery Network (CDN) System design:    • System Design: How to design CDN? Intervie...   Online Payments (QR Code) Paytm System design:    • System design interview - How online payme...   Spotify and AppleMusic System design:    • System Design: Spotify | YouTube Music | A...   Top 10 Songs in youtube/spotify:    • System Design : Top 10 Songs, Top Trending...   Amazon (Bestselling Book) System design:    • System design: Amazon.com Best sellers Ran...   WhatsApp System design (part 2):    • System Design Interviews : Whatsapp | Face...   Indian Railway Booking System design:    • IRCTC System Design | Railway Online Reser...   Distributed logging System design:    • System Design : How to design a distribute...   Redbus System design (Part 1):    • System Design: Redbus Online bus ticket bo...   Redbus System design (Part 2):    • System Design: Redbus Online bus ticket bo...   Twitter System design:    • System Design: How to design Twitter? Inte...   Tiny URL System design:    • System Design : Design a service like TinyUrl   Web Monitoring tool System design:    • System design: Web monitoring tool   #reachgoals #Systemdesign