[OAK-4243] Oak Segment Tar Module

• Type: Epic
• Status: Closed
• Priority: Major
• Resolution: Done
• Fix Version/s: 1.6.1, 1.8.0
• Component/s: segment-tar
• Epic Name: Segment Tar
• Assignee: Michael Dürig
• Reporter: Michael Dürig
• Created: 20/Apr/16 08:40
• Updated: 19/Jan/18 14:19
• Resolved: 23/Feb/17 16:09

Description

There is a couple of issues requiring us to change the segment format in a non compatible way (OAK-3348, OAK-2896, OAK-2498, OAK-4201).

We should introduce a new module here

• to minimise ripple effect on concurrent development work in other parts of Oak and upstream projects
• to be able to cleanly migrate existing repositories via a side grading
• to cleanly separate breaking changes from the existing code base

The plan is roughly to:

• Create new module (called oak-segment-next for now, will discuss names later)
• Apply patch prepared for OAK-3348
• Discuss and decide on final name and refactor accordingly
• Reactor affected tooling such that the targeted segment store can be specified via an option. Keep default at oak-segment.
• Once sufficiently stabilised, deprecate oak-segment. Make this one the default in switch the default target for tooling.
• Define and implement migration path

I will create respective issues as needed.

Issue Links

• is blocked by: OAK-4256 CLONE - Cross gc sessions might introduce references to pre-compacted segments
• is blocked by: OAK-3348 Cross gc sessions might introduce references to pre-compacted segments