Change Details

The high-level checklist: [X] 0. Set the configuration flag to "old" (see T166732) (not needed, default is now "old") [X] 1. Merge the first patch for {T166732} (adding new schemas and code) [X] 2. Perform schema change (T174569) [X] 3. Turn the feature flag to "read write both". See if stuff breaks. [X] 3.1. Announce the pending change to wikitech-l@ and cloud@, and give time for people to update. [X] 3.2. Make sure all deployed extensions are updated. [X] 4. Turn the feature flag to "write new only, read both". See if stuff breaks. [X] 5. Run the maintenance script(s) to migrate all the old stuff to new stuff, blanking the old stuff in the process. [X] 6. Turn the feature flag to "new only". [X] Default and CI [X] Beta Cluster [X] Group 0 [X] Group 1 [X] Group 2 [ ] 7. Remove old schemas and code [ ] 7.1. Update WMCS replicas to no longer reference old schemas (T212972). [ ] 7.2. Write and merge patches to remove `$wgCommentTableSchemaMigrationStage`, supporting code, and old schemas. [ ] 7.3. Submit #schema-change task for WMF production. For the cleaning up of `revision_comment_temp`, see T215466. This and T188327 both block T161671, which in turn is the first step of that task.

The high-level checklist: [X] 0. Set the configuration flag to "old" (see T166732) (not needed, default is now "old") [X] 1. Merge the first patch for {T166732} (adding new schemas and code) [X] 2. Perform schema change (T174569) [X] 3. Turn the feature flag to "read write both". See if stuff breaks. [X] 3.1. Announce the pending change to wikitech-l@ and cloud@, and give time for people to update. [X] 3.2. Make sure all deployed extensions are updated. [X] 4. Turn the feature flag to "write new only, read both". See if stuff breaks. [X] 5. Run the maintenance script(s) to migrate all the old stuff to new stuff, blanking the old stuff in the process. [X] 6. Turn the feature flag to "new only". [X] Default and CI [X] Beta Cluster [X] Group 0 [X] Group 1 [X] Group 2 [ ] 7. Remove old schemas and code [ ] 7.1. Update WMCS replicas to no longer reference old schemas (T212972). [X] 7.2. Write and merge patches to remove `$wgCommentTableSchemaMigrationStage`, supporting code, and old schemas. [ ] 7.3. Submit #schema-change task for WMF production. For the cleaning up of `revision_comment_temp`, see T215466. This and T188327 both block T161671, which in turn is the first step of that task.

The high-level checklist: [X] 0. Set the configuration flag to "old" (see T166732) (not needed, default is now "old") [X] 1. Merge the first patch for {T166732} (adding new schemas and code) [X] 2. Perform schema change (T174569) [X] 3. Turn the feature flag to "read write both". See if stuff breaks. [X] 3.1. Announce the pending change to wikitech-l@ and cloud@, and give time for people to update. [X] 3.2. Make sure all deployed extensions are updated. [X] 4. Turn the feature flag to "write new only, read both". See if stuff breaks. [X] 5. Run the maintenance script(s) to migrate all the old stuff to new stuff, blanking the old stuff in the process. [X] 6. Turn the feature flag to "new only". [X] Default and CI [X] Beta Cluster [X] Group 0 [X] Group 1 [X] Group 2 [ ] 7. Remove old schemas and code [ ] 7.1. Update WMCS replicas to no longer reference old schemas (T212972). [ ] 7X] 7.2. Write and merge patches to remove `$wgCommentTableSchemaMigrationStage`, supporting code, and old schemas. [ ] 7.3. Submit #schema-change task for WMF production. For the cleaning up of `revision_comment_temp`, see T215466. This and T188327 both block T161671, which in turn is the first step of that task.