[OAK-6531] Implement rolling upgrade from Oak 1.6

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.6, 1.8.0
• Component/s: segment-tar
• Labels: migration upgrade
• Epic Link: TarMK GC scalability
• Assignee: Francesco Mari
• Reporter: Michael Dürig
• Created: 08/Aug/17 14:18
• Updated: 25/Aug/17 04:30
• Resolved: 15/Aug/17 10:21

Description

The segment format changes introduced for tail compaction (OAK-3349) must not require an explicit migration step. Instead there should be a rolling migration during normal operation.

Things to consider:

• Segments from Oak 1.6
• Changes in tar index formats induced by the segment format changes
• Changes in gc.log induced by the segment format changes
• Required changes in the repository manifest and its interpretation

Issue Links

• relates to: OAK-6457 Increment the segment version number