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How to disable accelerated network on cluster nodearray which seems to conflict with InfiniBand?

Josselin Guillozet 21 Reputation points
2021-02-05T15:57:09.893+00:00

I have been running HPC cluster with HB-series VMs in West Europe for a few months without issue.

Recently, I have had trouble with the Mellanox InfiniBand driver.
It seems to be due to the Accelerated Networking option enabled for the nodeararrays (VM scale set) created by CycleCloud.

I would like to be able to disable this Accelerated Network from the CycleCloud template.

Azure CycleCloud
Azure CycleCloud
A Microsoft tool for creating, managing, operating, and optimizing high-performance computing (HPC) and big compute clusters in Azure.
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  1. Paul Edwards 81 Reputation points Microsoft Employee
    2021-03-26T11:07:31.533+00:00

    To disable accelerated networking in the UI:

    • Select the "Arrays" tab
    • Select the row and click "Edit"
    • Click the "+" at the bottom of the dialog box
    • Type in "EnabledAcceleratedNetworking" and "false" in to the new line that appears and save

    New nodes will now get this setting.

    1 person found this answer helpful.

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  1. TravisCragg-MSFT 5,681 Reputation points Microsoft Employee
    2021-02-05T22:01:28.543+00:00

    I do not believe that this is directly possible. Accelerated Networking is enabled / disabled via the NIC. CycleCloud's Templates do not have an option for enabling / disabling accelerated Netoworking on a NIC, but they do allow specifying an existing NIC. You can use this to specify an existing NIC that has accelerated networking disabled.