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To make sure that GPU capacity is always available for your nodes (virtual machines, VMs), you can reserve GPUs. A reservation represents a capacity block group, and it reserves a specific number of GPUs that are allocated to your infrastructure. GPUs from a reservation remain available, even if a VM is stopped. Without reservations, GPU capacity is taken from a shared pool and returned when a VM is stopped (for example, by you or a maintenance event). To start using reservations, send a request to your Nebius manager. In this request, specify how many GPUs you would like to reserve and for what period. If you are not in contact with a Nebius manager, you can ask technical support to connect you with one. After reservations are ready, you can add them to your existing node groups or create new ones with reservations. You can also check your capacity block groups on the Limits page and get detailed information about them. For more information, see List of capacity block groups.
GPUs allocated from reservations do not count towards quotas on the number of GPUs.

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How to add reservations to node groups

Node groups of a regular type with GPUs support reservations. Preemptible node groups and node groups without GPUs do not support reservations.
If you want to create a node group, in the creation form, under Computing resources, select With GPU and a regular VM type. After that, specify the Reservation usage settings.If you want to modify an existing node group, go to its Settings tab on the node group page. Next, update the Reservation usage settings.The Reservation usage settings are only displayed if you have capacity block groups.Available Reservation usage options:
  • With reservations: Resources are allocated from reservations. In the Reservation section, you can configure the following options:
    • Any (existing and future) (default): Compute selects among your matching capacity block groups automatically.
    • Specific capacity block groups: Select one or more capacity block groups. Each option shows the capacity block group ID, reservation period and GPU usage. Make sure the selected groups have enough capacity and do not expire soon.
    • Switch to PAYG: Choose whether the VM can start after you create or restart it without active intervals in selected capacity block groups:
      • When reservation is exhausted (default): The VM can start as a pay-as-you-go VM when no capacity is available in the selected capacity block groups.
      • Never: The VM cannot start without available capacity in the selected capacity block groups.
      This does not affect the VM when it is running. If an interval in a selected capacity block group expires while the VM is running, the VM always continues as a pay-as-you-go VM, regardless of this setting.
    If you have capacity block groups in multiple regions, select a Region first.
  • Without reservations: Resources are allocated from the common pool, and no reservations are used for the node group.

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What’s next

To find information about reservations, check the pages of your VMs (nodes). The VM page and the list of VMs show what reservation policy you have configured and what reservations currently apply. For more information, see How to find information about reservations for an already configured VM. For details about how billing works when you use reservations, see Billing for reservations.

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See also