[HBASE-6610] HFileLink: Hardlink alternative for snapshot restore

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.95.2
• Fix Version/s: 0.95.0
• Component/s: io
• Labels: snapshot
• Hadoop Flags: Reviewed
• Release Note: Adds a 'HardLink', an hfile proxy that tolerates files being moved from original location out to archive; it will find and serve the data whichever location the file happens to be in.
• Assignee: Matteo Bertozzi
• Reporter: Matteo Bertozzi
• Created: 19/Aug/12 16:06
• Updated: 23/Sep/13 18:30
• Resolved: 28/Sep/12 06:33

Description

To avoid copying data during restore snapshot we need to introduce an HFile Link that allows to reference a file that can be in the original path (/hbase/table/region/cf/hfile) or, if the file is archived, in the archive directory (/hbase/.archive/table/region/cf/hfile).