feat: Added Pre schedule plugin API #1682
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Signed-off-by: Shmuel Kallner <[email protected]>
Signed-off-by: Shmuel Kallner <[email protected]>
Signed-off-by: Shmuel Kallner <[email protected]>
Signed-off-by: Shmuel Kallner <[email protected]>
Signed-off-by: Shmuel Kallner <[email protected]>
Signed-off-by: Shmuel Kallner <[email protected]>
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: shmuelk The full list of commands accepted by this bot can be found here.
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Discussed with @nirrozenbaum. We likely will need a proposal or an issue for an extension of the framework as this is a novel addition |
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/hold |
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What type of PR is this?
/kind feature
What this PR does / why we need it:
This PR adds a new optional extension point, the PreSchedule plugin. This plugin when specified is invoked by the Director before the scheduler is invoked. In particular it is in charge of getting the candidate pods to be filtered and scored by the scheduling process.
The new PreSchedule plugin enables more sophisticated pod selection strategies.
This is particularly useful in cases where one is using an autoscaler in a cluster of many InferencePools that are "sharing" a set of GPUs. In periods of inactivity for some particular model, one might want to scale its InferencePool to zero and use the freed up GPU in another InferencePool. When requests for the model that was scaled to zero come in, one would want to scale that InferencePool up from zero, in order to process the requests.
Does this PR introduce a user-facing change?: