Cache Eviction
Recycling RAM when limits are reached: Least Recently Used (LRU), LFU, and FIFO.
What you'll learn
- Cache Invalidation Policies
- Decoupled Message Queues
- Dynamic Load Distribution
TL;DR
Recycling RAM when limits are reached: Least Recently Used (LRU), LFU, and FIFO.
Visual System Topology
Cache Eviction Dynamic Load Scaling
Concept Overview
Cache Eviction is an optimization and scaling pattern engineered to optimize latency, distribute heavy client traffic, and prevent processing bottlenecks under high-volume spikes. Recycling RAM when limits are reached: Least Recently Used (LRU), LFU, and FIFO.
As systems scale, simple single-server architectures break down. The key to handling millions of concurrent users lies in distributed optimization: caches to shield slow databases, load balancers to distribute compute resources, and messaging queues to process transactions asynchronously. Designing this layer correctly protects systems from crashing during viral traffic events.
Key Architectural Pillars
Cache Invalidation Policies
Managing cache correctness when master database updates occur, preventing stale client reads.
Decoupled Message Queues
Piping event streams asynchronously to absorb high traffic peaks and guarantee backend durability.
Dynamic Load Distribution
Deploying intelligent reverse proxies to split load equally across pools of stateless app servers.