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From "zhaoyunjiong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7044) Support retention policy based on access time and modify time, use XAttr to store policy
Date Thu, 11 Sep 2014 08:15:34 GMT
zhaoyunjiong created HDFS-7044:
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             Summary: 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


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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