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https://issues.apache.org/jira/browse/SPARK-6112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-6112:
-----------------------------------

    Assignee:     (was: Apache Spark)

> Provide external block store support through HDFS RAM_DISK
> ----------------------------------------------------------
>
>                 Key: SPARK-6112
>                 URL: https://issues.apache.org/jira/browse/SPARK-6112
>             Project: Spark
>          Issue Type: New Feature
>          Components: Block Manager
>            Reporter: Zhan Zhang
>         Attachments: SparkOffheapsupportbyHDFS.pdf
>
>
> HDFS Lazy_Persist policy provide possibility to cache the RDD off_heap in 
> hdfs. We may want to provide similar capacity to Tachyon by leveraging hdfs 
> RAM_DISK feature, if the user environment does not have tachyon deployed. 
> With this feature, it potentially provides possibility to share RDD in memory 
> across different jobs and even share with jobs other than spark, and avoid 
> the RDD recomputation if executors crash. 



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