[
https://issues.apache.org/jira/browse/SPARK-24011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
wuyi updated SPARK-24011:
-------------------------
Summary: Cache rdd's immediate parent ShuffleDependencies to accelerate
getShuffleDependencies() (was: Cache rdd's immediate parent ShuffleDependency
to accelerate getShuffleDependencies())
> Cache rdd's immediate parent ShuffleDependencies to accelerate
> getShuffleDependencies()
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-24011
> URL: https://issues.apache.org/jira/browse/SPARK-24011
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: wuyi
> Priority: Minor
>
> When creating stages for jobs, we need to find a rdd's (except the final rdd)
> immediate parent ShuffleDependencies by method getShuffleDependencies() for
> at least 2 times (first in
> getMissingAncestorShuffleDependencies(), and second in
> getOrCreateParentStages()).
> So, we can cache the result at the fist time we call getShuffleDependencies().
> This is helpful for cutting time consuming when there's many
> NarrowDependencies between the rdd and its immediate parent
> ShuffleDependencies or if the rdd has a number of immediate parent
> ShuffleDependencies .
>
> There's an exception for checkpointed rdd. If a rdd is checkpointed, it's
> immediate parent ShuffleDependencies should adjust to empty.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
