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Maniphest T231672

Stop writing to pre-MCR fields in WMF production
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Description

This is a configuration change, not a coding task (except fixing any bugs identified by the switch).

This epic cannot begin until T231671 is complete.

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StatusSubtypeAssignedTask
 ResolvedNoneT231668 MCR schema migration
 ResolvedZabeT231674 [Epic] Remove support for writing to the pre-MCR schema
 ResolvedNoneT231672 Stop writing to pre-MCR fields in WMF production
 ResolvedNoneT183487 MCR schema migration stage 3: stop using legacy fields
 ResolvedtstarlingT183488 MCR schema migration stage 2: populate new fields
 ResolvedAnomieT183489 MCR schema migration stage 1: Fix Legacy Archive Rows
 ResolvedAnomieT183486 MCR schema migration stage 0: create tables
 ResolvedAnomieT36925 [MCR] create maintenance script for Migration of text from archive table to text table
 ResolvedAnomieT184629 Run maintenance/migrateArchiveText.php on all wikis
 ResolvedAnomieT191307 Run maintenance/populateArchiveRevId.php on all wikis
 ResolvedAnomieT193180 Clean up archive rows with duplicate revision IDs
 ResolvedAnomieT202032 Duplicate ar_rev_id values in several wikis
 ResolvedAnomieT174030 Implement DB schema migration tools for MCR
 ResolveddanielT174028 Finalize database schema for MCR content meta-data
ResolvedAnomieT182678 [MCR] Script for populating empty ar_rev_id fields
 ResolvedAnomieT182682 [MCR] Script(s) for populating new tables (slots, content, content_models, slot_roles)
 ResolvedMarosteguiT190153 DROP unused 'slots' table (WAS: In the slots table, replace slot_inherited with slot_origin)
 ResolvedAnomieT196172 Test schema migration script
 ResolvedtstarlingT197816 Enable MCR migration stage "write both, read old" on live systems
 ResolvedAnomieT197817 Enable MCR migration stage "write both, read old" on testwiki
 ResolvedAnomieT198312 Set the WMF cluster to use the new MCR-only schema
 ResolveddanielT198558 Set testwiki to use the new MCR-only schema
 ResolveddanielT198559 Set Beta Cluster wikis to use the new MCR-only schema
 ResolvedAnomieT198311 Enable MCR migration stage "write both, read new" on commons beta.
 ResolvedAnomieT197818 Enable MCR migration stage "write both, read old" on commons beta.
 ResolveddanielT197619 Introduce SCHEMA_COMPAT_XXX constants to allow more fine grained control over the migration process
 ResolveddanielT198413 Allow multiple slots to be used while still writing to the old as well as the new schema
 ResolveddanielT236735 Allow WikiExporter to function with MCR-only schema
 ResolvedNoneT231671 [EPIC] Ensure all direct or indirect access to pre-MCR fields is gated with the MCR migration stage and emits a warning if any pre-MCR schema fields are accessed
 Resolved• CCicalese_WMFT231689 Can get bulk access from code that has been using the 'text' for getQueryInfo()
Resolved• CCicalese_WMFT231693 No direct or indirect access to pre-MCR fields is ungated
 ResolveddanielT198341 Remove all references to the rev_text_id and ar_text_id fields
 Resolved• PcheloloT198342 Remove all usages of the 'text' flag in calls to Revision::getQueryInfo() and RevisionStore::getQueryInfo().
 ResolveddanielT198706 Make BackupDumper, WikiExporter and XmlDumpWriter compliant with the MCR revision retrival mechanism (main slot only)
 ResolvedBPirkleT203424 Replace the WikiExporter backup dump streaming mode with batched queries
 Resolved• PcheloloT233356 Flow: remove dependency on pre-MCR database schema
 Resolved• ClarakosiT233357 ReplaceText: remove dependency on pre-MCR database schema
 ResolveddanielT233358 SpamBlacklist: remove dependency on pre-MCR database schema
 Resolved• PcheloloT198343 Replace all calls to Revision::getRevisionText()
 Resolved• PcheloloT228675 Remove direct access to the text table from the Translate extension.
 Resolved• PcheloloT228988 Create batch access interface for page content
 Resolved• PcheloloT233173 Make RevisionStore::newRevisionsFromBatch use BlobStore::getBlobBatch
 Resolved• PcheloloT230834 Create batch access interface for BlobStore
 ResolveddanielT234034 Create low level batch access interface for page content
 ResolveddanielT233350 ActiveAbstract: remove dependency on pre-MCR database schema
 Resolved• holger.knustT233353 EntitySchema: remove dependency on pre-MCR database schema
 Resolved• PcheloloT233355 WikimediaMaintenance: remove dependency on pre-MCR database schema
 ResolvedNoneT231699 A warning is emitted if any pre-MCR fields are accessed
 ResolvedNoneT200918 Make sure code that accesses legacy pre-MCR fields triggers warnings before switching off WRITE_OLD (compat) mode.

Event Timeline

• CCicalese_WMF created this task.Aug 30 2019, 5:37 PM
• CCicalese_WMF triaged this task as Medium priority.
• CCicalese_WMF mentioned this in T231673: Make SCHEMA_COMPAT_NEW the default MCR migration schema.Aug 30 2019, 5:43 PM
• CCicalese_WMF moved this task from Epic Backlog to Need User Stories on the Platform Team Workboards (Epics) board.Aug 30 2019, 6:18 PM
• CCicalese_WMF added a subtask: T183487: MCR schema migration stage 3: stop using legacy fields.Aug 30 2019, 10:42 PM
• CCicalese_WMF moved this task from Need User Stories to Ready for Engineering on the Platform Team Workboards (Epics) board.Aug 31 2019, 12:38 AM
daniel added a parent task: T231674: [Epic] Remove support for writing to the pre-MCR schema.Sep 1 2019, 1:16 PM
daniel added a subtask: T231671: [EPIC] Ensure all direct or indirect access to pre-MCR fields is gated with the MCR migration stage and emits a warning if any pre-MCR schema fields are accessed.
• CCicalese_WMF removed a project: Platform Engineering.Sep 3 2019, 5:00 PM
• CCicalese_WMF moved this task from Ready for Engineering to Doing on the Platform Team Workboards (Epics) board.Oct 22 2019, 12:15 PM
• CCicalese_WMF closed subtask T231671: [EPIC] Ensure all direct or indirect access to pre-MCR fields is gated with the MCR migration stage and emits a warning if any pre-MCR schema fields are accessed as Resolved.Nov 4 2019, 3:38 PM
• CCicalese_WMF closed this task as Resolved.Nov 22 2019, 9:35 PM
• CCicalese_WMF closed subtask T183487: MCR schema migration stage 3: stop using legacy fields as Resolved.
• CCicalese_WMF moved this task from Doing to Done! on the Platform Team Workboards (Epics) board.
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