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Oleg Zhurakousky commented on SPARK-3561: ----------------------------------------- [~vanzin] I would not call it hard (we have done it in the initial POC by simply mixing custom trait into SC - essentially extending it), however I do agree that a lot of Spark's initialization would still happen due to the implementation of SC itself thus creating and initializing some of the artifacts that may not be used with different execution context. Question; Why was it done like this and not pushed into some SC.init operation? > Allow for pluggable execution contexts in Spark > ----------------------------------------------- > > Key: SPARK-3561 > URL: https://issues.apache.org/jira/browse/SPARK-3561 > Project: Spark > Issue Type: New Feature > Components: Spark Core > Affects Versions: 1.1.0 > Reporter: Oleg Zhurakousky > Labels: features > Fix For: 1.2.0 > > Attachments: SPARK-3561.pdf > > > Currently Spark provides integration with external resource-managers such as > Apache Hadoop YARN, Mesos etc. Specifically in the context of YARN, the > current architecture of Spark-on-YARN can be enhanced to provide > significantly better utilization of cluster resources for large scale, batch > and/or ETL applications when run alongside other applications (Spark and > others) and services in YARN. > Proposal: > The proposed approach would introduce a pluggable JobExecutionContext (trait) > - a gateway and a delegate to Hadoop execution environment - as a non-public > api (@Experimental) not exposed to end users of Spark. > The trait will define 6 operations: > * hadoopFile > * newAPIHadoopFile > * broadcast > * runJob > * persist > * unpersist > Each method directly maps to the corresponding methods in current version of > SparkContext. JobExecutionContext implementation will be accessed by > SparkContext via master URL as > "execution-context:foo.bar.MyJobExecutionContext" with default implementation > containing the existing code from SparkContext, thus allowing current > (corresponding) methods of SparkContext to delegate to such implementation. > An integrator will now have an option to provide custom implementation of > DefaultExecutionContext by either implementing it from scratch or extending > form DefaultExecutionContext. > Please see the attached design doc for more details. -- 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