SQL Server HA and DR Options: A Field Guide
Log shipping, replication, mirroring, FCIs, and Availability Groups compared: what each protects, sync vs async, failover, editions, and versions.
Distributed Availability Groups: Architecture, Failover, and the Gotchas Nobody Mentions
A practical guide to SQL Server Distributed Availability Groups, covering architecture, failover mechanics, scripted runbooks, and the FileStream bug that TF 5597 fixes.