Limit of users for each hostpool

Question

Hello,
We are using standard storage with Multisession VMs. We want to move 3000+ users on AVD.
Per VM we are having 8 users configured.
We using Nerdio as our Integration tool.
All those users belongs to one Location but multiple departments.
Is there any limitations for each host pool i.e. we should not allow more than 500 users to connect to one Host Pool.
Please advise.

Answer 1

Hello

The Azure Virtual Desktop Service limits can be found here. https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/azure-subscription-service-limits#azure-virtual-desktop-service-limits (Shared below as well)

Azure Virtual Desktop Object	Per Parent Container Object	Service Limit
Workspace	Azure Active Directory Tenant	1300
HostPool	Workspace	400
Application group	Azure Active Directory Tenant	500<sup>1</sup>
RemoteApp	Application group	500
Role Assignment	Any Azure Virtual Desktop Object	200
Session Host	HostPool	10,000

Using these numbers you can have up to 10,000 VM's per host pool which would be more than enough for your 3000 users.

As you are looking at setting up multi session hosts for 8 users, I would recommend you read the guidance here. https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/virtual-machine-recs?toc=%2Fazure%2Fvirtual-desktop%2Ftoc.json&bc=%2Fazure%2Fvirtual-desktop%2Fbreadcrumb%2Ftoc.json

While there is no limit to the number of users per session, the limits will be relating to the number of resources available on the session host per user (CPU, Memory, Disk I/O)

I hope this answers your question

Alistair

Answer 2

Hello @Pankaj Gupta (IT)

We don't have a limit of 500 users per host pool. Nevertheless, you should consider using Premium SSDs for the OS disk on Multi-session VMs as Standard HDD will run into IOPS limits when multiple users are working on a single VM.
Also, at that scale of users, you will be concerned over network (egress) or on-prem dependencies. Depending on the profile requirements, your best bet is using ANF, but AzFiles can work with this number of users with some effort/planning to balance IOPS and Throughput limits on storage accounts.

We have remote desktop sizing guidance that you should check out along with the below Service Limits: Azure subscription limits and quotas - Azure Resource Manager | Microsoft Docs

AVD Service Limits

Azure subscription limits and quotas - Azure Resource Manager | Microsoft Learn

https://docs.microsoft.com/en-us/azure/architecture/example-scenario/wvd/windows-virtual-desktop#azure-limitations

You can currently deploy 399 VMs per Azure Virtual Desktop ARM template deployment without Availability Sets, or 200 VMs per Availability Set. You can increase the number of VMs per deployment by switching off Availability Sets in either the ARM template or the Azure portal host pool enrollment.

Subscription, Service, Resource Group Limits

Resources per resource group, per resource type: 800 - Some resource types can exceed the 800 limit. See Resources not limited to 800 instances per resource group.

ARM Limits - Request limits and throttling - Azure Resource Manager | Microsoft Learn

Azure Resource Manager (ARM) subscription API throttling limits don't allow more than 600 Azure VM reboots per hour via the Azure portal. You can reboot all your machines at once via the operating system, which doesn't consume any Azure Resource Manager subscription API calls. For more information about counting and troubleshooting throttling limits based on your Azure subscription, see Troubleshoot API throttling errors.

Image Limits - Overview of Azure Compute Gallery - Azure Virtual Machines | Microsoft Learn

For non-Virtual Machine Scale Set deployments - For every 20 VMs that you create concurrently, we recommend you keep one replica. For example, if you are creating 120 VMs concurrently using the same image in a region, we suggest you keep at least 6 replicas of your image.

For Virtual Machine Scale Set deployments - For each scale set you create concurrently, we recommend you keep one replica.

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