nova/releasenotes/notes/add_initial_allocation_ratio-2d2666d62426a4bf.yaml
Matt Riedemann 945e7cb2a4 Fix typo in initial_disk_allocation_ratio release note
Change-Id: Ib8becc39ce76847652d3538c3334cc3514ba7a33
Closes-Bug: #1816831
2019-02-20 14:35:01 -05:00

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YAML

---
upgrade:
- |
The default value for the "cpu_allocation_ratio", "ram_allocation_ratio"
and "disk_allocation_ratio" configurations have been changed to ``None``.
The ``initial_cpu_allocation_ratio``, ``initial_ram_allocation_ratio`` and
``initial_disk_allocation_ratio`` configuration options have been added to
the ``DEFAULT`` group:
- initial_cpu_allocation_ratio with default value 16.0
- initial_ram_allocation_ratio with default value 1.5
- initial_disk_allocation_ratio with default value 1.0
These options help operators specify initial virtual CPU/ram/disk to
physical CPU/ram/disk allocation ratios. These options are only used when
initially creating the ``computes_nodes`` table record for a given
nova-compute service.
Existing ``compute_nodes`` table records with ``0.0`` or ``None`` values
for ``cpu_allocation_ratio``, ``ram_allocation_ratio`` or
``disk_allocation_ratio`` will be migrated online when accessed or when
the ``nova-manage db online_data_migrations`` command is run.
For more details, refer to the `spec`__.
.. __: https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/initial-allocation-ratios.html