[SERVER-32825] Add the infrastructure for upgrade/downgrade of V2Unique indexes Created: 22/Jan/18  Updated: 30/Oct/23  Resolved: 18/May/18

Status: Closed
Project: Core Server
Component/s: Storage
Affects Version/s: None
Fix Version/s: 4.0.0-rc0

Type: Improvement Priority: Major - P3
Reporter: Neha Khatri Assignee: Neha Khatri
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
depends on SERVER-32757 Resolve any fallout due IndexVersion ... Closed
depends on SERVER-33458 With index version bump, update jstes... Closed
depends on SERVER-33459 Investigate test failures in sharding... Closed
is depended on by SERVER-34954 Verify unique index version upgrade f... Closed
is depended on by SERVER-32992 Report an error when using MongoDB 4.... Closed
is depended on by SERVER-32996 Enhance multiversion test framework t... Closed
Duplicate
is duplicated by SERVER-32996 Enhance multiversion test framework t... Closed
Related
related to SERVER-32995 Execute tests to ensure correct index... Closed
related to SERVER-34263 Make new format unique index creation... Closed
Backwards Compatibility: Fully Compatible
Sprint: Storage Non-NYC 2018-03-12, Storage Non-NYC 2018-03-26, Storage Non-NYC 2018-04-09, Storage Non-NYC 2018-04-23, Storage Non-NYC 2018-05-07, Storage Non-NYC 2018-05-21
Participants:
Story Points: 3

 Description   

Addition of new index format allows use of both V2 and V2Unique format. Initially we would add a gating variable to select the unique index format. Switch to FCV as the deciding factor for which format should be used.

  • Setting FCV=4.2 will cause all unique indexes to be updated to V2Unique. Do not update the content of the indexes.
  • Having FCV=4.0 would create older V2 format indexes


 Comments   
Comment by Githook User [ 18/May/18 ]

Author:

{'username': 'nehakhatri5', 'name': 'nehakhatri5', 'email': 'neha.khatri@mongodb.com'}

Message: SERVER-32825 Add upgrade/downgrade infrastructure for timestamp safe unique index.

This change is currently guarded by a gating variable.
Branch: master
https://github.com/mongodb/mongo/commit/73c68499002379882c3a5c4af2c50e04a42f73a0

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