1260cdd492
This change updates the cpu and ram initial allocation ratios to 4.0 and 1.0 to reflect the typical values that are suitable for non web hosting workloads. Change-Id: I283eb270a4e47da15cf01d098b4f3952f7b5b570 implements: bp/nova-change-default-overcommit-values
22 lines
1.1 KiB
YAML
22 lines
1.1 KiB
YAML
---
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upgrade:
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In this release the default values for the initial ram and cpu allocation
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ratios have been updated to 1.0 and 4.0 respectively. This will not
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affect any existing compute node resource providers but the new default
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will take effect on the creation of new resource providers.
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other:
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The default initial allocation ratios enabled ram over commit by default
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with a factor of ``1.5``. This value was chosen early in nova's history
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as the predominant workload was web hosting or other light weight
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virtualization. Similarly the default initial cpu allocation ratio
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defaulted to 16. As more demanding workload from telco, enterprise,
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scientific and governmental users became the norm the initial values we
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had chosen became less and less correct overtime. These have now been
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updated to reflect a more reasonable default for the majority of our users.
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As of this release the initial ram allocation value is 1.0 disabling
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overcommit by default for new compute nodes and the initial cpu allocation
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ratio is now 4.0 which is a more reasonable overcommit for non idle
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workloads.
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