Update CC goal documentation #9678
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Signed-off-by: Kyle Liberti <[email protected]>
kyguy
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Feb 12, 2024
| @@ -61,7 +61,7 @@ Resource distribution goals are subject to link:{BookURLConfiguring}#property-cr | |||
| == Hard and soft optimization goals | |||
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| Hard goals are goals that _must_ be satisfied in optimization proposals. | |||
| Goals that are not configured as hard goals are known as _soft goals_. | |||
| Goals that are not hard coded as _hard goals_ in Cruise Control are known as _soft goals_. | |||
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| Goals that are not hard coded as _hard goals_ in Cruise Control are known as _soft goals_. | |
| Goals that are not defined as _hard goals_ in Cruise Control code are known as _soft goals_. |
| @@ -71,16 +71,21 @@ An optimization proposal that does _not_ satisfy all the hard goals is rejected | |||
| NOTE: For example, you might have a soft goal to distribute a topic's replicas evenly across the cluster (the topic replica distribution goal). | |||
| Cruise Control will ignore this goal if doing so enables all the configured hard goals to be met. | |||
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| In Cruise Control, the following xref:main-goals[main optimization goals] are preset as hard goals: | |||
| In Cruise Control, the following xref:main-goals[main optimization goals] are hard coded as hard goals: | |||
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| In Cruise Control, the following xref:main-goals[main optimization goals] are hard coded as hard goals: | |
| In Cruise Control, the following xref:main-goals[main optimization goals] are hard goals: |
Signed-off-by: Kyle Liberti <[email protected]>
PaulRMellor
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Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
scholzj
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PaulRMellor
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Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
Co-authored-by: PaulRMellor <[email protected]> Signed-off-by: Kyle Liberti <[email protected]>
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Type of change
Description
Following up the discussion from here [1] and here [2] we have a misunderstanding of how the
hard.goalsconfiguration works in Cruise Control. We cannot configure whether a goal is a "soft goal" or a "hard goal". Thehard.goalsconfiguration only allows us to specify which goals will be enforced to run by Cruise Control.For example, if
NetworkInboundCapacityGoalis not specified indefault.goalslist but specified in thehard.goalslist, Cruise Control will throw an error. In order to ensureNetworkInboundCapacityGoalis not run, it must be removed fromdefault.goalsandhard.goalslists. Cruise Control hard codes which goals are "hard" and which are "soft" (e.g.NetworkInboundCapacityGoalis hard coded as a "hard goal", we cannot configure it as a "soft goal"). Therefore, if a hard goal is listed in thedefault.goalslist, it will prevent a optimization proposal from being generated if it is not satisfied.This PR updates the documentation to reflect this information.
[1] https://github.com/orgs/strimzi/discussions/9546
[2] linkedin/cruise-control#2111
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