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[SPARK-41525][K8S] Improve onNewSnapshots to use unique lists of known executor IDs and PVC names - #39070
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dongjoon-hyun wants to merge 1 commit into
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[SPARK-41525][K8S] Improve onNewSnapshots to use unique lists of known executor IDs and PVC names#39070dongjoon-hyun wants to merge 1 commit into
onNewSnapshots to use unique lists of known executor IDs and PVC names#39070dongjoon-hyun wants to merge 1 commit into
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onNewSnapshotsonNewSnapshotsonNewSnapshots to use unique list of known executor IDs and PVC namesdongjoon-hyun
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Dec 15, 2022
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cc @viirya and @attilapiros |
onNewSnapshots to use unique list of known executor IDs and PVC namesonNewSnapshots to use unique list of known executor IDs and PVC namesonNewSnapshots to use unique list of known executor IDs and PVC namesonNewSnapshots to use unique lists of known executor IDs and PVC names| schedulerBackend: KubernetesClusterSchedulerBackend, | ||
| snapshots: Seq[ExecutorPodsSnapshot]): Unit = { | ||
| val k8sKnownExecIds = snapshots.flatMap(_.executorPods.keys) | ||
| val k8sKnownExecIds = snapshots.flatMap(_.executorPods.keys).distinct |
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The original code is in Spark 3.1.2 and Spark 3.2.0.
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So snapshots may contain duplicates too?
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snapshots is defined as a sequence of snapshot history originally. Logically, there can be a few snapshot which the same contents, but in the most cases, they will be different by object metadata or status.
| pod.getSpec.getVolumes.asScala | ||
| .flatMap { v => Option(v.getPersistentVolumeClaim).map(_.getClaimName) } | ||
| } | ||
| }.distinct |
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This is since Spark 3.2.0.
viirya
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Dec 15, 2022
dongjoon-hyun
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Dec 15, 2022
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Thank you, @viirya ! |
dongjoon-hyun
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Dec 15, 2022
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All tests passed except the master branch dependency test failure. Merged to master. |
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What changes were proposed in this pull request?
This PR improve
ExecutorPodsAllocator.onNewSnapshotsby removing duplications atk8sKnownExecIdsandk8sKnownPVCNames. In the large cluster, this causes inefficiency.Why are the changes needed?
The existing variables have lots of duplications because
snapshotsisSeq[ExecutorPodsSnapshot].For example, if we print out the values, it looks like the following.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Manual review because this is an improvement on the local variable computation.