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---
features:
- |
Added traits support to the scheduler. A new flavor extra spec is added to
support specifying the required traits. The syntax of extra spec is
``trait:<trait_name>=required``, for example:
- trait:HW_CPU_X86_AVX2=required
- trait:STORAGE_DISK_SSD=required
The scheduler will pass required traits to the
``GET /allocation_candidates`` endpoint in the Placement API to include
only resource providers that can satisfy the required traits. Currently
the only valid value is ``required``. Any other value will be considered
invalid.
This requires that the Placement API version 1.17 is available before
the ``nova-scheduler`` service can use this feature.
The FilterScheduler is currently the only scheduler driver that supports
this feature.
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