Which concept focuses on operating highly available workloads in the cloud?

Reliability in cloud design ensures workloads can recover quickly from disruptions and continue operating as expected. This concept focuses on high availability, fault tolerance, and disaster recovery. Reliability requires implementing redundancy, backup strategies, and robust monitoring.

Security ensures data protection, operational excellence covers continuous improvement, and resource hierarchy refers to organizational structures, but none focus specifically on availability and resilience.

By prioritizing reliability, organizations design cloud architectures capable of withstanding failures at multiple layers—compute, storage, networking, and even regions. This design principle ensures customer trust and compliance with service-level agreements.