To try out the new, MCR enabled database schema, we want this setting on testwiki:
$wgMultiContentRevisionSchemaMigrationStage = SCHEMA_COMPAT_WRITE_BOTH | SCHEMA_COMPAT_READ_NEW;
This keeps writing to the old schema as well, so we can still easily back out of the migration.
We could also do this on a testwiki dedicated to commons, see T197616: Create a production test wiki in group0 to parallel Wikimedia Commons.
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Set MCR migration to write-both/read-new on testwiki. | operations/mediawiki-config | master | +1 -0 |
| Status | Subtype | Assigned | Task | |
|---|---|---|---|---|
| · · · | ||||
| Resolved | Anomie | T198308 Enable MCR migration stage "write both, read new" on live systems | ||
| Resolved | Anomie | T198309 Enable MCR migration stage "write both, read new" on testwiki | ||
| Resolved | Anomie | T197817 Enable MCR migration stage "write both, read old" on testwiki | ||
| Resolved | tstarling | T183488 MCR schema migration stage 2: populate new fields | ||
| Resolved | daniel | T198561 Make "write both, read new" the default MCR migration stage for fresh MediaWiki installs / for CI | ||
| Resolved | Anomie | T198311 Enable MCR migration stage "write both, read new" on commons beta. | ||
| · · · |
Note that T183488 needs to be completed before this can proceed, unless we're sure testwiki doesn't try to read revisions from any other wiki's DB.
Change 454534 had a related patch set uploaded (by Daniel Kinzler; owner: Daniel Kinzler):
[operations/mediawiki-config@master] Set MCR migration to read-both/read-new on testwiki.
Change 454534 merged by jenkins-bot:
[operations/mediawiki-config@master] Set MCR migration to write-both/read-new on testwiki.
Mentioned in SAL (#wikimedia-operations) [2018-09-20T15:56:20Z] <anomie@deploy1001> Synchronized wmf-config/InitialiseSettings.php: Setting MCR migration stage to write-both/read-new on testwiki (T198309) (duration: 00m 59s)