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From "Matei Zaharia (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-2538) External aggregation in Python
Date Thu, 24 Jul 2014 18:00:44 GMT

     [ https://issues.apache.org/jira/browse/SPARK-2538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matei Zaharia updated SPARK-2538:
---------------------------------

    Priority: Critical  (was: Major)

> External aggregation in Python
> ------------------------------
>
>                 Key: SPARK-2538
>                 URL: https://issues.apache.org/jira/browse/SPARK-2538
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>    Affects Versions: 1.0.0, 1.0.1
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>            Priority: Critical
>              Labels: pyspark
>             Fix For: 1.0.0, 1.0.1
>
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> For huge reduce tasks, user will got out of memory exception when all the data can not
fit in memory.
> It should put some of the data into disks and then merge them together, just like what
we do in Scala. 



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