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HDDS-8929. Avoid list allocation for pipeline search #4980

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merged 1 commit into from
Jun 26, 2023

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adoroszlai
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What changes were proposed in this pull request?

Pipeline#equals includes equality of getNodes(), which wraps the set of nodes in a new ArrayList (defensive "copy"). This is unnecessary, we can compare the underlying Set.

(see HealthyPipelineChoosePolicy.choosePipelineIndex in flamegraph from HDDS-8897)

https://issues.apache.org/jira/browse/HDDS-8929

How was this patch tested?

CI:
https://github.com/adoroszlai/hadoop-ozone/actions/runs/5376416993

@guohao-rosicky
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Thanks @adoroszlai work on this, this can really improve performance.

Although now look at the flame chart, The lock has little impact on latency, and whether the lock will be optimized subsequently, as it can improve throughput.

@adoroszlai adoroszlai requested a review from sodonnel June 26, 2023 12:56
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LGTM

@adoroszlai adoroszlai merged commit 2118381 into apache:master Jun 26, 2023
@adoroszlai adoroszlai deleted the HDDS-8929 branch June 26, 2023 15:07
@adoroszlai
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Thanks @guohao-rosicky, @sodonnel for the review.

errose28 added a commit to errose28/ozone that referenced this pull request Jun 26, 2023
* master: (79 commits)
  HDDS-8914. Datanode may fail to start due to duplicate VolumeInfoMetrics (apache#4966)
  HDDS-8921. Add support for EC in Freon SCM block generator (apache#4982)
  HDDS-8927. Metadata scanner should not scan unhealthy containers. (apache#4976)
  HDDS-8929. Avoid list allocation for pipeline search (apache#4980)
  HDDS-8778. Support recursive volume delete using Ozone sh command. (apache#4842)
  HDDS-8885. Quota repair count enable quota feature for old bucket/volume. (apache#4941)
  HDDS-8771. Refactor volume level tmp directory for generic usage. (apache#4838)
  HDDS-8922. Random EC read pipeline ID causes XceiverClient cache churn (apache#4971)
  HDDS-8586 Recon. - API for Count of deletePending keys and amount of data mapped to such keys. (apache#4923)
  HDDS-8908. Intermittent failure in TestBlockDeletion#testBlockDeletion (apache#4958)
  HDDS-8910. Replace LockManager with striped lock in ContainerStateManager (apache#4962)
  HDDS-8917. Move protobuf conversion out of the lock in PipelineStateManagerImpl (apache#4965)
  HDDS-8825. Use apache/hadoop 3.3.5 docker image (apache#4963)
  HDDS-8906. Avoid stream when getting in-service healthy nodes (apache#4960)
  HDDS-8907. Store volume count when storage report is updated (apache#4957)
  HDDS-8905. PipelineManager metrics should not be synchronized (apache#4959)
  HDDS-8553. Improve scanner integration tests. (apache#4936)
  HDDS-8854. Avoid unnecessary DatanodeDetails creation for NodeStateManager lookup (apache#4925)
  HDDS-8315. [Snapshot] Added unit tests for SnapshotDiffManager (apache#4716)
  HDDS-7968. [Snapshot] Improve KeyDeletingService to reclaim eligible key blocks in snapshot's deletedTable (apache#4935)
  ...
errose28 added a commit to errose28/ozone that referenced this pull request Jun 26, 2023
* master:
  HDDS-8914. Datanode may fail to start due to duplicate VolumeInfoMetrics (apache#4966)
  HDDS-8921. Add support for EC in Freon SCM block generator (apache#4982)
  HDDS-8927. Metadata scanner should not scan unhealthy containers. (apache#4976)
  HDDS-8929. Avoid list allocation for pipeline search (apache#4980)
  HDDS-8778. Support recursive volume delete using Ozone sh command. (apache#4842)
  HDDS-8885. Quota repair count enable quota feature for old bucket/volume. (apache#4941)
  HDDS-8771. Refactor volume level tmp directory for generic usage. (apache#4838)
  HDDS-8922. Random EC read pipeline ID causes XceiverClient cache churn (apache#4971)
vtutrinov pushed a commit to Cyrill/ozone that referenced this pull request Jul 3, 2023
vtutrinov pushed a commit to Cyrill/ozone that referenced this pull request Jul 3, 2023
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3 participants