Further update: we began the migration today but had to rollback due to queries receiving 502 errors. You can see the ~30 minute window where queries were affected here <https://grafana.wikimedia.org/d/000000489/wikidata-query-service?from=1746565518823&orgId=1&to=1746568158166&var-cluster_name=wdqs&var-graph_type=%289102%7C919%5B35%5D%29&viewPanel=44> .
We're working on figuring out a fix, and we'll likely take another swing at the migration tomorrow (Wednesday). Ryan On Mon, May 5, 2025 at 7:19 PM Ryan Kemper <[email protected]> wrote: > Brief update: > > We're still putting the final pieces in place for the cutover to the main > graph, so we're pushing to *Tuesday May 6 (2025-05-06)*. > > Ryan > > On Thu, May 1, 2025 at 9:44 PM Ryan Kemper <[email protected]> wrote: > >> Hello Wikidata community, >> >> As mentioned in previous communications [1], we are continuing forward on >> the WDQS public graph split. >> >> The next stage of our rollout is to change query.wikidata.org to point >> to the main graph (which can also be reached directly on >> query-main.wikidata.org), whereas the scholarly graph will be available >> on query-scholarly.wikidata.org. >> >> Most queries should run fine on the appropriate graph (main vs >> scholarly), but for queries that must run across the full dataset, the >> queries must be (re)written to use SPARQL federation [2]. You can ask for >> help to rewrite your queries [3]. If you encounter issues please feel free >> to report a problem [4]. >> >> If you need more time to do the transition you can use the new legacy >> endpoint [5] (query-legacy-full.wikidata.org) which contains the full >> Wikidata graph, but is limited in terms of performance and availability. >> Please be mindful when using this legacy endpoint and use it only if really >> needed. This endpoint will be available until December 2025. >> >> We are moving to this next stage on *Monday May 5* (*2025-05-05*). >> >> [1] >> https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/WDQS_backend_update/March_2025_scaling_update >> [2] >> https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/WDQS_graph_split/Internal_Federation_Guide >> [3] https://www.wikidata.org/wiki/Wikidata:Request_a_query >> [4] >> https://www.wikidata.org/wiki/Wikidata:Report_a_technical_problem/WDQS_and_Search >> >> [5] https://phabricator.wikimedia.org/T384422 >> >> Ryan >> >
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