Developers should avoid using Redis as the primary database for data that must not be lost, as Redis's in-memory design risks data loss if RDB and AOF persistence are not properly configured. Avoid storing large values over 1MB because large payloads increase memory pressure and network bandwidth costs. Do not run Redis without setting memory limits and eviction policies configured. Avoid Redis Cluster for simple caching purposes where Redis Sentinel offers sufficient high availability with less operational complexity.
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