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PlanetScale explains how its Neki database performs a planned primary-to-replica switchover with minimal disruption, covering preflight validation, convergence/promotion, WAL position tracking, and client recovery.
DIYgod published a blog post detailing a whole-home privacy gateway setup using two NAS devices: a Surge primary gateway and an mihomo backup gateway achieve failover by floating a virtual IP via keepalived/arping, and the post compares real-world performance of WARP, self-hosted VPS exit nodes, and WireGuard vs. SS2022 protocols.
Apache Kafka introduces native cluster mirroring to embed cross-cluster replication directly into the broker, simplifying data movement between clusters with byte-for-byte transfer and exact offset preservation.
Delta is Meta's object storage service that uses chain replication to achieve high availability and strong consistency, designed for critical bootstrap and disaster recovery workloads.
Freno is an open-source, cooperative throttler service from GitHub that limits writes to MySQL clusters based on replication lag, using Raft for high availability.