Comprehensive master guide to caching strategies, Redis eviction policies, consistent hashing, cache stampede mitigations, and distributed Redis cluster topology.

Cache Strategies & Design Patterns

Redis Eviction Policies

Redis `maxmemory-policy` Settings

Policy	Scope	Behavior
`noeviction`	All Keys	Returns error on writes when memory limit reached. Best for critical caches.
`allkeys-lru`	All Keys	Evicts Least Recently Used keys across entire dataset. (Most popular choice).
`volatile-lru`	Keys with TTL	Evicts Least Recently Used keys among keys configured with expiration TTL.
`allkeys-lfu`	All Keys	Evicts Least Frequently Used keys using logarithmic access counters.
`volatile-ttl`	Keys with TTL	Evicts keys with the shortest remaining Time-To-Live.

Cache Stampede & Hot Key Mitigation

Redis Cluster vs Redis Sentinel

Cache Strategies & Design Patterns

Redis Eviction Policies

Redis maxmemory-policy Settings

Cache Stampede & Hot Key Mitigation

Redis Cluster vs Redis Sentinel

Redis `maxmemory-policy` Settings