e76ec7af4d
This change updated the default of [compute]/packing_host_numa_cells_allocation_strategy to False making nova spread vms across numa nodes by defualt. This should significantly improve scheduling performace when there are a large number of host and guest numa node and non empty hosts. see bug 1978372 for details. Related-Bug: #1978372 Change-Id: I6fcd2c6b58dd36674be57eee70894ce04335955a
13 lines
628 B
YAML
13 lines
628 B
YAML
---
|
|
upgrade:
|
|
- |
|
|
During the triage of https://bugs.launchpad.net/nova/+bug/1978372
|
|
we compared the performance of nova's numa allocations strategies
|
|
as it applied to the large numbers of host and guest numa nodes.
|
|
Prior to ``Xena`` nova only supported a linear packing strategy.
|
|
In ``Xena`` ``[compute]/packing_host_numa_cells_allocation_strategy``
|
|
was introduced maintaining the previous packing behavior by default.
|
|
The numa allocation strategy has now been defaulted to spread.
|
|
The old behavior can be restored by defining:
|
|
``[compute]/packing_host_numa_cells_allocation_strategy=true``
|