Caching Strategy for High-Performance Data Access
OVERVIEW
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Implement a multi-layer caching system to improve response times for frequently accessed data.
CACHE LAYERS
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1. Application Cache (Redis)
- Store user sessions
- Cache API responses for 5-15 minutes
- Use LRU eviction policy
2. Database Query Cache
- Cache complex aggregation queries
- Invalidate on data changes
- Use query fingerprinting for cache keys
3. CDN/Edge Cache
- Cache static assets
- Cache API responses for public data
- Geographic distribution for global users
IMPLEMENTATION DETAILS
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Cache Keys Format:
- User data: "user:{user_id}:{version}"
- API responses: "api:{endpoint}:{params_hash}"
- Query results: "query:{table}:{query_hash}"
TTL Strategy:
- User sessions: 30 minutes
- API responses: 5-15 minutes based on data volatility
- Query results: 10-60 minutes based on update frequency
Cache Warming:
- Pre-populate frequently accessed data during low-traffic periods
- Use background jobs to refresh cache before expiration
- Implement cache warming for new deployments
MONITORING
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- Track cache hit/miss ratios
- Monitor cache memory usage
- Alert on cache performance degradation
- Track cache invalidation patterns