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Posts with the tag bigtable:

System Design Weekly 017: July - August 2021

Highlights How WhatsApp enables multi-device capability WhatsApp phone client was previously a source of truth. If someone wanted to use WhatsApp on another device, the messages would be transferred through the smartphone app. If the smartphone battery was drained, such a companion app would not be able to work. The smartphone kept the data. WhatsApp now allows connecting 4 additional devices that are independent of the smartphone. Each device gets an identity key.