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Overview Field Details Title [Concise decision name] Date @Date Status [Proposed / Accepted / Deprecated / Superseded] Author [Your Name / Team] 🧭 Background & Drivers Why this decision matters now.Summarize the problem or technical/business context that prompted this decision. Example:Our backend caching layer must support a projected 10x traffic increase ahead of the Q3 product launch. We’re currently using Redis 5 in standalone mode, which does not scale horizontally. We need a more robust, distributed approach. ✅ Final Decision Summarize the outcome, clearly and concisely.We will adopt Redis Cluster as our new caching infrastructure to enable horizontal scalability and prepare for increased traffic volume. 🧩 Options Considered Option Pros Cons Redis Sentinel Simple setup; team has experience Doesn’t support sharding or horizontal scaling Memcached Fast and lightweight No persistence; limited compatibility Redis Cluster Scales horizontally; active community Higher operational complexity 💡 Why We Chose This Path Explain the reasoning behind the final choice. Consider: Long-term scalability Operational maintainability Team familiarity and ramp-up effort Risk and failure tolerance Performance and resilience Cost implications Example:Redis Cluster offers native sharding and failover support. While setup is more complex than Redis Sentinel, the benefits in scale and availability outweigh the added overhead. The team has prior experience with Redis and is comfortable managing clusters with automation tools. 🔍 Impact & Trade-offs Expected Outcomes: ✅ Handles higher load with built-in scaling ✅ Enables multi-node resilience ⚠️ Slightly higher complexity in local development and testing ⚠️ Requires additional monitoring setup 📚 Reference Links