In the face of zonal outages, ensuring seamless server recovery is critical for maintaining business continuity. With this new enhancement in Dec 2024, your mission-critical MySQL workloads on Azure Database for MySQL – Flexible Server Business Critical service tier are now zone-resilient by default—at no additional cost. Even if you don’t configure high availability (HA), Flexible Server will host your data and log files in zone-redundant storage by default. Existing servers configured for zone-redundant HA continue to benefit from the 99.99% uptime service level agreement (SLA) provided by built-in zonal redundancy and hot standby. In addition, servers configured for same-zone HA and non-HA also benefit—they can recover quickly from zonal outages using the zone-redundant backups.