Consensus problem in distributed systems

A fundamental problem in a distributed system is obtaining consensus on some data value to achieve overall system reliability on top of unreliable system components. In the real world, system components are never perfect. They are prone to hardware failures, packet drops, slow network and clock skews.
In this talk, Geethanjali Eswaran walks us through common scenarios in a distributed system where all the components should agree on the state of the system for it to be reliable.