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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