Azure Premium Storage features up to 64 TB of storage and 80,000 IOPS per VM with 2,000 MB per second disk throughput per VM. The back-end of Azure Premium Storage uses dedicated connections between the SSDs in storage and the compute clusters. Azure Premium Storage uses locally redundant storage to replicate data three times within the same region for high availability needs.
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Azure Premium Storage uses three provision disk sizes: P10, P20 and P30. P10 disks have 128 GB disk size, 500 IOPS per disk and 100 MB per second throughput per disk. P20 disks have a size of 512 GB; 2,300 IOPS per disk and 150 MB per second throughput per disk. P30 disk types have a disk size of 1 TB; 5,000 IOPS per disk and throughput of 200 MB per second.
Azure Premium Storage is not available in all Azure regions; users are asked to check the services by region listing on the Microsoft Azure site.
Developers can access Azure Premium Storage through Azure's Storage REST API, Service Management REST API and Azure PowerShell. However, Premium Storage analytics is not currently available and administrators will need to use OS-based diagnostics, such as Windows Performance Monitor or enable Azure VM Diagnostics.
Azure Premium Storage was introduced in April 2015.