YugabyteDB Resiliency vs. PostgreSQL High Availability Solutions: High availability has traditionally been achieved through enhanced disaster recovery solutions, but these measures still result in complete downtime for the application during failover processes. In contrast, YugabyteDB's high availability is based on resiliency, which ensures continuous application operation even in the event of failures. This approach eliminates the need for failover and recovery, providing additional protection against disasters. Unlike traditional databases, YugabyteDB's resiliency allows replication to be cross-version, enabling rolling upgrades without downtime.