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Sandboxes in VM sizes not supporting nested virtualization

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In this article, we'll cover the limitations of sandboxes in VM sizes that don't support nested virtualization.

Prerequisites and limitations

Sandboxes that run on non-modern VM sizes are subject to the following limitations:

  • The sandbox image is fixed - either Python 3.6.5 or R 3.4.4.
  • Data engines that enable both disk encryption and sandboxes features must run on a VM size that supports encryption at host. For more information on supported VM sizes, see Virtual machine sizes.
    • If encryption is enabled on the cluster before encryption at host is adopted as the default for supported VM sizes, the cluster may not support both features side by side. In this case, stop and start the cluster.
  • The required packages (images) for running the sandboxes are deployed to every cluster node and require dedicated SSD space to run.
    • The estimated size is 20 GB, that is roughly 2.5% the SSD capacity of a D14_v2 VM, for example, or 0.7% the SSD capacity of a L16_v1 VM.
    • This affects the cluster's data capacity, and may affect the cost of the cluster.
  • Hyper-threading is disabled for hyper-threaded VM sizes when sandboxes are enabled. For more information on hyper-threaded VM sizes, see Virtual machine sizes.
  • Child processes: The sandbox in the following VM sizes is blocked from spawning child processes.

Virtual machine sizes

The following table lists all VM sizes not supporting nested virtualization, and whether they support both encryption and sandbox features running side by side, and hyper-threading:

Name Category Supports sandboxes and encryption Supports hyper-threading
Dev(No SLA) Standard_D11_v2 compute-optimized No No
Dev(No SLA) Standard_E2a_v4 compute-optimized No No
Standard_D11_v2 compute-optimized No No
Standard_D12_v2 compute-optimized No No
Standard_D13_v2 compute-optimized No No
Standard_D14_v2 compute-optimized No No
Standard_E2a_v4 heavy compute No Yes
Standard_E4a_v4 heavy compute No Yes
Standard_E8a_v4 heavy compute No Yes
Standard_E16a_v4 heavy compute No Yes
Standard_DS13_v2 + 1 TB PS storage-optimized Yes No
Standard_DS13_v2 + 2 TB PS storage-optimized Yes No
Standard_DS14_v2 + 3 TB PS storage-optimized Yes No
Standard_DS14_v2 + 4 TB PS storage-optimized Yes No
Standard_E8as_v4 + 1 TB PS storage-optimized Yes Yes
Standard_E8as_v4 + 2 TB PS storage-optimized Yes Yes
Standard_E16as_v4 + 3 TB PS storage-optimized Yes Yes
Standard_E16as_v4 + 4 TB PS storage-optimized Yes Yes
Standard_L4s storage-optimized Yes No
Standard_L8s storage-optimized Yes No
Standard_L16s storage-optimized Yes No
Standard_L8s_v2 storage-optimized Yes Yes
Standard_L16s_v2 storage-optimized Yes Yes
Standard_E64i_v3 isolated compute No No
Standard_E80ids_v4 isolated compute No Yes