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Realtime Messaging Services Design

Functional Requirnments one to one / group chat support for multimedia – text / images / video / loccationRead receipt / Message status Last seen Push notifications Non Functional Requirnments No latency / lag HA ( high availibilty ) + Fault tolerent scalablity ( 2 billion users , 1.6 Monthly ative users ) traffic 64 billion msgs / day Administrative req – GDPR so on Design…