This task is for tracking the migration (T220791) on WMF wikis.
Steps
- Create the new schema
- Merge r459818
- Set the Beta Cluster migration stage to SCHEMA_COMPAT_WRITE_OLD | SCHEMA_COMPAT_READ_OLD
- Set the Beta Cluster migration stage to SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_OLD
- Let the migration script run automatically on the Beta Cluster
- Set the Beta Cluster migration stage to SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_NEW
- Set the migration stage to SCHEMA_COMPAT_WRITE_OLD | SCHEMA_COMPAT_READ_OLD (r647091)
- Set the migration stage to SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_OLD (r647116)
- Run the migration script (T269713)
- Set the Beta Cluster migration stage to SCHEMA_COMPAT_NEW
- Set the migration stage to SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_NEW (657695)
- Ensure there are no issues
- Set the migration stage to SCHEMA_COMPAT_NEW (657696)
- Make SCHEMA_COMPAT_NEW the extension default (657698)
- Stop setting the migration stage (657697)