Is there a scale limit for host pools created in the Azure portal?
在 Azure 门户中创建的主机池是否存在规模限制？
These factors can affect scale limit for host pools:
The Azure template is limited to 800 objects. To learn more, see Azure subscription and service limits, quotas, and constraints. Each VM also creates about six objects, so that means you can create around 132 VMs each time you run the template.
There are restrictions on how many vCPUs you can create per region and per subscription. For example, if you have an Enterprise Agreement subscription, by default you can create 350 vCPUs. You need to divide 350 by either the default number of vCPUs per VM or your own vCPU limit to determine how many VMs you can create each time you run the template. Learn more at Virtual Machines limits - Azure Resource Manager and Check vCPU quotas.
The VM prefix name can't exceed 11 characters, so that when a sequential number is added the total name is a maximum of 15 characters. To learn more, see Naming rules and restrictions for Azure resources.
这些因素可能会影响主机池的规模限制：
Azure 模板限制为 800 个对象。 有关详细信息，请参阅 Azure 订阅和服务限制、配额和约束。 每个 VM 还会创建约 6 个对象，因此，每次运行该模板时，都可以创建约 132 个 VM。
每个区域和每个订阅可以创建的核心数有限制。 例如，如果你有企业协议订阅，则可以创建 350 个核心。 你需要将 350 除以每个 VM 的默认核心数或你自己的核心限制，以确定每次运行模板时可以创建多少个 VM。 请在虚拟机限制 - Azure 资源管理器中了解详细信息。
VM 前缀名称和 VM 数量少于 15 个字符。 若要了解详细信息，请参阅 Azure 资源的命名规则和限制。