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Many types and sizes of virtual machines are available in Microsoft Azure, and we will learn what types and sizes of virtual machines Microsoft provides to facilitate evaluation during the project.

Types

Size

Description

General use

B, Dsv3, Dv3, DSv2, Dv2, Av2, DC

The CPU / memory ratio is balanced. Suitable for testing and development, small to medium-sized databases, and low-to medium-flow Web servers.

Calculation and optimization

Fsv2 、 Fs 、 F

High CPU to memory ratio. Suitable for medium-traffic Web servers, network devices, batch processing, and application servers.

Memory optimization

Esv3 、 Ev3 、 M 、 GS 、 G 、 DSv2 、 Dv2

High memory to CPU ratio. Suitable for relational database servers, medium to large-scale caching and in-memory analysis.

Storage optimization

Lsv2 、 Ls

High disk throughput and IO are ideal for big data, SQL, NoSQL databases, data warehouses and large transaction databases.

GPU

NV, NVv2, NC, NCv2, NCv3, ND, Ndv2 (Preview)

Dedicated virtual machines for a large number of graphics rendering and video editing, as well as ND designed for artificial intelligence (AI) and deep learning. You can select a single or multiple GPU.

High performance computing

H

The fastest and most powerful CPU virtual machine has an optional high-throughput network interface (RDMA).

For pricing information on virtual machines of different sizes, please refer to https://azure.microsoft.com/zh-cn/pricing/details/virtual-machines/linux/#Windows

Now that we know the type and size of Azure virtual machines, we also need to understand some of the general limitations of Azure VM.

Subscription restrictions for Azure Explorer

Resources

Default limit

Maximum limit

Number of VM per subscription

10000 per area

10000 per area

Total number of VM cores per subscription

20 per area

Contact support staff

Number of VM cores per subscription by series (Dv2, F, etc.)

20 per area

Contact support staff

For classic resources, the total number of vCPU per subscription to VM defaults to 20, with a maximum of 10000.

Cloud service virtual machine limit

Resources

Default limit

Maximum limit

Number of virtual machines per cloud service

fifty

fifty

Number of input termination points for each cloud service

one hundred and fifty

one hundred and fifty

Virtual machine size set limit

Resources

Default limit

Maximum limit

Maximum number of VM concentrated in siz

one thousand

one thousand

Maximum number of VM, depending on the custom VM image in the size set

six hundred

six hundred

The maximum number of scale sets in a region

2000

2000

The number of virtual machines per availability set is limited to 200 by default.

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