Master caching patterns, writing strategies, and eviction policies for high-performance system design.
Application manages the cache. Reads from DB if cache miss, then populates cache. Data is loaded on demand.
Data is written to cache and DB simultaneously. Ensures strong consistency but higher write latency.
Data written to cache immediately. Updated to DB asynchronously later. Fast writes, risk of data loss.
Data expires after a set time period. Useful for data that changes frequently or shouldn't be stale.
Least Recently Used. Discards the least recently used items first when the cache is full.
Cache automatically refreshes recently accessed keys before they expire to prevent latency spikes.