# Class InstanceSelection (5.28.0)

5.28.0 (latest) 5.27.0 5.26.0 5.25.0 5.24.0 5.23.0 5.22.0 5.21.0 5.20.0 5.18.1 5.17.1 5.16.0 5.15.1 5.14.0 5.13.0 5.12.0 5.10.2 5.9.3 5.8.0 5.7.0 5.6.0 5.5.1 5.4.3 5.3.0 5.2.0 5.1.0 5.0.3 4.0.3 3.3.2 3.2.0 3.1.1 3.0.0 2.6.2 2.5.0 2.4.0 2.3.1 2.2.0 2.0.2 1.1.3 1.0.1 0.8.2 0.7.0 0.6.1 0.5.0

    InstanceSelection(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Defines machines types and a rank to which the machines types
belong.

| ## Attributes ||
|---|---|
| **Name** | **Description** |
| `machine_types` | `MutableSequence[str]` Optional. Full machine-type names, e.g. "n1-standard-16". |
| `rank` | `int` Optional. Preference of this instance selection. Lower number means higher preference. Dataproc will first try to create a VM based on the machine-type with priority rank and fallback to next rank based on availability. Machine types and instance selections with the same priority have the same preference. |