A company is planning to migrate a mission-critical, transaction-heavy online transaction processing (OLTP) database to an Azure Virtual Machine. The database workload requires extreme performance with up to several hundred thousand IOPS, high throughput in gigabytes per second, and consistently sub-millisecond disk latency. Which Azure managed disk type should the company choose for this workload?

Ultra Disk: ### What Ultra Disk Is **Azure Ultra Disk** is Azure's highest-performing managed disk storage option, engineered specifically for top-tier, I/O-intensive workloads running on **Azure Virtual Machines**. ### How It Meets The Requirements Ultra Disk is designed for the most demanding enterprise workloads, providing: - **Extreme IOPS**: Scales up to **400,000 IOPS** per disk depending on capacity and configuration. - **High throughput**: Delivers throughput caps of up to **10,000 MB/s**, perfectly accommodating heavy data stream requirements. - **Sub-millisecond latency**: Provides consistent sub-millisecond disk latency suitable for top-tier **OLTP databases**. ### Key Advantages and Capabilities - **Dynamic performance configuration**: Allows granular tuning of IOPS and throughput independently from disk capacity without restarting the virtual machine. - **Massive scalability**: Supports disk capacities up to **65,536 GiB (64 TiB)**. - **Tailored for heavy enterprise systems**: Ideal for enterprise databases such as SAP HANA, Oracle Database, and Microsoft SQL Server. - **Flexible performance scaling**: Avoids over-provisioning storage capacity simply to obtain higher I/O capabilities. ### Why This Is Optimal While **Premium SSD** provides high performance for standard production systems, it cannot reach the hundreds of thousands of IOPS or 10,000 MB/s throughput limits offered by **Ultra Disk**. This makes Ultra Disk the ideal and necessary choice for extreme database workloads.

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