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Posted to hdfs-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2014/08/23 22:58:11 UTC

[jira] [Updated] (HDFS-6918) Investigate eviction from RAM disk via file truncation

     [ https://issues.apache.org/jira/browse/HDFS-6918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arpit Agarwal updated HDFS-6918:
--------------------------------

    Assignee:     (was: Arpit Agarwal)

> Investigate eviction from RAM disk via file truncation
> ------------------------------------------------------
>
>                 Key: HDFS-6918
>                 URL: https://issues.apache.org/jira/browse/HDFS-6918
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Arpit Agarwal
>
> We proposed evicting blocks from RAM disk by just deleting the file. Assuming the client completes its read quickly the block will be deleted when the client closes its handle.
> [~cmccabe] suggested making eviction more reliable by truncating the file length to 0. This task is to investigate the same.



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