org.apache.flink.runtime.jobmaster.slotpool.EvenlySpreadOutLocationPreferenceSlotSelectionStrategy Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.flink.runtime.jobmaster.slotpool;
import org.apache.flink.runtime.clusterframework.types.ResourceProfile;
import org.apache.flink.runtime.jobmanager.scheduler.Locality;
import javax.annotation.Nonnull;
import java.util.Collection;
import java.util.Comparator;
import java.util.Optional;
class EvenlySpreadOutLocationPreferenceSlotSelectionStrategy extends LocationPreferenceSlotSelectionStrategy {
@Nonnull
@Override
protected Optional selectWithoutLocationPreference(@Nonnull Collection availableSlots, @Nonnull ResourceProfile resourceProfile) {
return availableSlots.stream()
.filter(slotInfoAndResources -> slotInfoAndResources.getRemainingResources().isMatching(resourceProfile))
.min(Comparator.comparing(SlotInfoAndResources::getTaskExecutorUtilization))
.map(slotInfoAndResources -> SlotInfoAndLocality.of(slotInfoAndResources.getSlotInfo(), Locality.UNCONSTRAINED));
}
@Override
protected double calculateCandidateScore(int localWeigh, int hostLocalWeigh, double taskExecutorUtilization) {
// taskExecutorUtilization in [0, 1] --> only affects choice if localWeigh and hostLocalWeigh
// between two candidates are equal
return localWeigh * 20 + hostLocalWeigh * 2 - taskExecutorUtilization;
}
}