Krinkle closed this task as "Resolved". Krinkle claimed this task. Krinkle added a comment.
In general when WANCache/getWithSet and purge is used, it works correctly both for single-DC and multi-DC. Using raw sets or deletes to local memcached has been discouraged for a while now, and we've have many years of 2 switchovers a year without memcached being wiped as precaution. Presumed solved as of T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking) <https://phabricator.wikimedia.org/T270223>. If bugs are found, new tasks can be filed for specific issues. TASK DETAIL https://phabricator.wikimedia.org/T93142 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Krinkle Cc: Krinkle, Addshore, aaron, daniel, JanZerebecki, Lydia_Pintscher, aude, Aklapper, Astuthiodit_1, karapayneWMDE, Invadibot, maantietaja, ItamarWMDE, Akuckartz, RhinosF1, Nandana, jijiki, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, Vali.matei, _jensen, rosalieper, Scott_WUaS, Wikidata-bugs, Mbch331, Jay8g
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