Michael Dürig created OAK-6531:

             Summary: Implement rolling upgrade from Oak 1.6
                 Key: OAK-6531
                 URL: https://issues.apache.org/jira/browse/OAK-6531
             Project: Jackrabbit Oak
          Issue Type: New Feature
          Components: segment-tar
            Reporter: Michael Dürig
             Fix For: 1.8, 1.7.7

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

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