[HDFS-4076] Support snapshot of single files

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Snapshot (HDFS-2802)
• Fix Version/s: Snapshot (HDFS-2802)
• Component/s: namenode
• Target Version/s: Snapshot (HDFS-2802)
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 19/Oct/12 00:32
• Updated: 19/Oct/12 19:40
• Resolved: 19/Oct/12 19:40

Description

The snapshot of a file shares the blocks with the original file in order to avoid copying data. However, the snapshot file has its own metadata so that it could have independent permission, replication, access time, etc.