Design a Key-Value Store - System Design Mock Interview (with Microsoft Software Engineer)

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Praveen, a software engineer at Microsoft, designs a key-value store like Memcache: an LRU cache with a hash table and doubly linked list, consistent hashing, read replicas, security, and monitoring.

0:00 - Intro
0:23 - Key value store for caching
2:54 - System availability, scalability, and performance requirements
4:15 - Simple cache implementation for one system
6:15 - Cache policy discusses data evictions
6:49 - LRU vs Hash table for tracking usage
11:26 - Scaled cache deployment with multiple approaches
13:04 - Deploy caches on different hosts, avoid maintenance overhead
14:47 - Deploying caches pros a…