KEP: Multi level Cluster Queues #1093
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Not sure plan A or B is better. Maintain a tree is easier when there are a lot of cluster queues in cluster, but it will cost more time when try to update the tree because we always have to update the whole tree. |
| - Allow users to define weights for different job of him/her. | ||
| ### Non-Goals | ||
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| - Cohort will not be deprecated because Kueue is forward campatible. |
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Not deprecating (or significantly limiting) cohorts would allow a kind-of 2 dimensional hierarchy with hard to understand logic (and even more complex code).
| This proposal allow cluster admins to define a multi-level hierachy for cluster queues. Multi-level of cluster queues allow admins and users to define different dequeue policies for different node. This will allow Kueue to manage more levels of resources. | ||
| ## Motivation | ||
| Systems like Yarn allow creating a hierarchy of fair sharing, which allows modeling deeper organizational structures with fair-sharing. | ||
| Kueue currently supports three organizational levels: Cohort (models a business unit), ClusterQueue (models divisions within a business unit), namespace (models teams within a division). However fair-sharing is only supported at one level, within a cohort. This is not convinent if there are more than one level in an organization or if some users want to manage the resource consumption of his/her own jobs. |
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How would exactly fair sharing work on multi-level hierarchy? How is it different from having a flattened structure with multiplied/compounded weights (from root to leaf)?
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in every node in cluster queue tree, cluster queues will have their guaranteed resources( min weight or nominal resouces ), parent cluster queues' min resources must larger than the sum of their children's
if any node's usage is more than min, then workloads in it can be preempted by other node in tree
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| - Cohort will not be deprecated because Kueue is forward campatible. | ||
| ## Proposal | ||
| We will extend cluster queues to allow a cluster queue to be the parent of another cluster queue. And allow admins to define weights for all these cluster queues. | ||
| ### PlanA |
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How do you plan to handle cluster-to-cluster authentication?
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/close |
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@alculquicondor: Closed this PR. In response to this:
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This proposal allow cluster admins to define a multi-level hierachy for cluster queues. Multi-level of cluster queues allow admins and users to define different dequeue policies for different node. This will allow Kueue to manage more levels of resources.
What type of PR is this?
/kind feature
What this PR does / why we need it:
Systems like Yarn allow creating a hierarchy of fair sharing, which allows modeling deeper organizational structures with fair-sharing.
Kueue currently supports three organizational levels: Cohort (models a business unit), ClusterQueue (models divisions within a business unit), namespace (models teams within a division). However fair-sharing is only supported at one level, within a cohort. This is not convinent if there are more than one level in an organization or if some users want to manage the resource consumption of his/her own jobs.
Special notes for your reviewer:
Does this PR introduce a user-facing change?