Noisy neighbor

updated: 2019-02-13 12:00

Noisy neighbor¶

Synopsis¶

display name: Noisy Neighbor

goal: noisy_neighbor

Requirements¶

Metrics¶

The noisy_neighbor strategy requires the following metrics:

metric	service name	plugins	comment
`cpu_l3_cache`	ceilometer	none	Intel CMT is required

Cluster data model¶

Default Watcher’s Compute cluster data model:

Actions¶

Default Watcher’s actions:

action description

migration

action	description
`migration`

Planner¶

Default Watcher’s planner:

Weight planner implementation

This implementation builds actions with parents in accordance with weights. Set of actions having a higher weight will be scheduled before the other ones. There are two config options to configure: action_weights and parallelization.

Limitations

This planner requires to have action_weights and parallelization configs tuned well.

Configuration¶

Strategy parameter is:

parameter	type	default	Value description
`cache_threshold`	Number	35.0	Performance drop in L3_cache threshold for migration

Efficacy Indicator¶

None

Algorithm¶

For more information on the noisy neighbor strategy please refer to: http://specs.openstack.org/openstack/watcher-specs/specs/pike/implemented/noisy_neighbor_strategy.html

How to use it ?¶

$ openstack optimize audittemplate create \
  at1 noisy_neighbor --strategy noisy_neighbor

$ openstack optimize audit create -a at1 \
  -p cache_threshold=45.0

External Links¶