Stream Analytics now offers support for Availability Zones with Dedicated Cluster. Availbility Zones are fault-isolated locations within an Azure region, providing redundant power, cooling, and networking. Azure Availability Zones enabled Stream Analytics allows you to run mission-critical applications with higher availability and fault tolerance to datacenter failures. Any new Dedicated Cluster will automatically benefit from Availability Zones, and in case of disaster in a zone will continue to run seamlessly by failing over to the other zones without the need of any user action.
Learn more about Azure Availability Zones.