NVMe

In the Ultra Transcenders books

AI-200AZ-802

Each book explains NVMe in context, with comparison tables and the common traps.

Terms in this definition

• Azure Managed Redis

  Successor to Azure Cache for Redis: a managed, Redis Enterprise-based in-memory store, with Memory Optimized, Balanced, Compute Optimized and Flash Optimized tiers.

• Hot

  The online blob access tier where storing data costs the most but accessing it costs the least.

• VALUES

  Returns in DAX the distinct column values, or table rows, still visible after filters are applied, sometimes with an extra blank entry. CALCULATE often takes the result as a table filter.

• Capacity

  A reserved block of compute for a tenant whose size is fixed by its SKU; Fabric F SKUs express it in capacity units (CUs). Workspaces assigned to it unlock features like Copilot, and from F64 upwards people with free licences can view Power BI content.

• General-purpose v1

  The older storage account kind (Storage), which lacks access tiers, Archive and premium file shares and retires on 13 October 2026. Converting to ZRS requires first upgrading to GPv2, a one-way change.

Related terms

• Discrete Device Assignment

  A Hyper-V capability that hands an entire PCIe device, a graphics card or NVMe drive for example, directly to a single virtual machine.

• PCIe

  Bus standard used by NVMe drives, GPUs and similar cards. With Discrete Device Assignment, one VM gets an entire such device to itself.

• SATA

  A local disk interface, usually slower than NVMe or SAS. vSAN ESA cannot use it since that architecture requires NVMe.

• Serial Attached SCSI

  SAS for short: the interface typically found on server drives and shared JBOD enclosures; Storage Spaces handles it alongside NVMe and SATA. Don't mix it up with Azure's shared access signatures.

• vSAN ESA

  Newer vSAN design built for NVMe, with one tier and storage pools rather than disk groups. OSA is the older design, using two tiers.