Before we can back-fill the new schema, we want to start writing to the new schema. This means setting
$wgMultiContentRevisionSchemaMigrationStage = SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_OLD;
For new, we'll keep reading from the old schema. See T198308: Enable MCR migration stage "write both, read new" on live systems for the next step.
| Status | Subtype | Assigned | Task | |
|---|---|---|---|---|
| · · · | ||||
| Resolved | Jdforrester-WMF | T194750 Deploy Structured Data on Commons baseline | ||
| Resolved | Anomie | T198308 Enable MCR migration stage "write both, read new" on live systems | ||
| Resolved | tstarling | T183488 MCR schema migration stage 2: populate new fields | ||
| Resolved | tstarling | T197816 Enable MCR migration stage "write both, read old" on live systems | ||
| Resolved | Anomie | T197817 Enable MCR migration stage "write both, read old" on testwiki | ||
| · · · |
Change 449649 had a related patch set uploaded (by Tim Starling; owner: Tim Starling):
[operations/mediawiki-config@master] Enable MCR migration stage "write both, read old" (the default) on remaining wikis
Change 449649 merged by jenkins-bot:
[operations/mediawiki-config@master] Enable MCR migration stage "write both, read old" (the default) on remaining wikis
Reopening, since this is not quite done: we need the current default to be ''explicit'' in the live config. Otherwise, we'll change the config of the live cluster when we change the default for master and CI with T198561: Make "write both, read new" the default MCR migration stage for fresh MediaWiki installs / for CI. Since we don't want that to happen right away, we need to have the value for $wgMultiContentRevisionSchemaMigrationStage in the config explicitly, and then change it explicitly to write-both/read-new with T198308: Enable MCR migration stage "write both, read new" on live systems.
Change 454527 had a related patch set uploaded (by Daniel Kinzler; owner: Daniel Kinzler):
[operations/mediawiki-config@master] Make current default of MCR migration stage explicit.
Change 454527 merged by jenkins-bot:
[operations/mediawiki-config@master] Make current default of MCR migration stage explicit.
Mentioned in SAL (#wikimedia-operations) [2018-08-22T13:07:20Z] <reedy@deploy1001> Synchronized wmf-config/InitialiseSettings.php: Set default for wgMultiContentRevisionSchemaMigrationStage T197816 (duration: 00m 56s)