You work as a systems architect for a medium$-$sized e$-$commerce company that relies heavily on its online platform for revenue generation. The company operates several data centers across different geographical locations to ensure redundancy and availability.

Recently, the company experienced a major outage in one of its primary data centers due to a hardware failure, resulting in significant revenue loss and damage to its reputation. As a result, the executive team has mandated the implementation of a robust High Availability $($HA$)$ and Disaster Recovery $($DR$)$ solution to prevent such incidents in the future.