[
https://issues.apache.org/jira/browse/SPARK-8695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14635099#comment-14635099
]
Apache Spark commented on SPARK-8695:
-------------------------------------
User 'piganesh' has created a pull request for this issue:
https://github.com/apache/spark/pull/7397
> TreeAggregation shouldn't be triggered when it doesn't save wall-clock time
> ---------------------------------------------------------------------------
>
> Key: SPARK-8695
> URL: https://issues.apache.org/jira/browse/SPARK-8695
> Project: Spark
> Issue Type: Improvement
> Components: MLlib, Spark Core
> Affects Versions: 1.5.0
> Reporter: Xiangrui Meng
> Priority: Minor
> Labels: starter
>
> If an RDD has 5 partitions, tree aggregation doesn't reduce the wall-clock
> time. Instead, it introduces scheduling and shuffling overhead. We should
> update the condition to use tree aggregation (code attached):
> {code}
> while (numPartitions > scale + numPartitions / scale) {
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
