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From "Zesheng Wu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7044) Support retention policy based on access time and modify time, use XAttr to store policy
Date Tue, 16 Sep 2014 14:46:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135548#comment-14135548
] 

Zesheng Wu commented on HDFS-7044:
----------------------------------

bq. The same arguments that said that HDFS-6382 should be outside the NN apply here as well.
Yes, can't agree any more. [~aw]

> Support retention policy based on access time and modify time, use XAttr to store policy
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-7044
>                 URL: https://issues.apache.org/jira/browse/HDFS-7044
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: namenode
>            Reporter: zhaoyunjiong
>            Assignee: zhaoyunjiong
>         Attachments: Retention policy design.pdf
>
>
> The basic idea is set retention policy on directory based on access time and modify time
and use XAttr to store policy.
> Files under directory which have retention policy will be delete if meet the retention
rule.
> There are three rule:
> # access time 
> #* If (accessTime + retentionTimeForAccess < now), the file will be delete
> # modify time
> #* If (modifyTime + retentionTimeForModify < now), the file will be delete
> # access time and modify time
> #* If (accessTime + retentionTimeForAccess < now && modifyTime + retentionTimeForModify
< now ), the file will be delete



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