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Multi-AZ Valkey: Replica Placement, Failover Priority and Zone-Aware Clients
Lay out self-managed Valkey Cluster and Sentinel across availability zones so a zone loss keeps a voting majority, a replica for every shard and a predictable failover.
Planned Valkey Switchovers Without Client Errors: CLIENT CAPA REDIRECT and FAILOVER
Switch a standalone Valkey primary to a replica with FAILOVER, and use CLIENT CAPA redirect so clients follow the new primary instead of failing with READONLY.
Sentinel on Valkey 9: Coordinated Failover and the ACL Change That Broke Failovers
Fix the Valkey 9.0.0 Sentinel ACL regression, set the right Sentinel ACL for 9.x, use coordinated failover safely, and upgrade Sentinel from 7.2 or 8.x to 9.1.
Valkey Cluster vs Sentinel: Choosing an HA Topology
Decide between Valkey Sentinel and Valkey Cluster on Valkey 9: data size limits, hash tags, numbered databases, client support, failover timing, and a migration runbook.
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