Large databases on single Redis shard cause slow failover and recovery

Running large datasets (>25GB or 25K ops/sec per shard) on a single Redis instance means failover, backup, and recovery all take significantly longer. If the instance fails, the entire dataset blast radius and recovery time are unacceptable for production systems.

Sources

• https://alex.dzyoba.com/blog/redis-experience/
• https://redis.io/tutorials/redis-anti-patterns-every-developer-should-avoid/?hmsr=joyk.com
• https://techleader.pro/a/414-Some-initial-thoughts-on-Redis

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