Dear Wikitechians, On *Wednesday March 1st*, the SRE team will run a planned data center switchover, moving all wikis from our primary data center in Virginia to the secondary data center in Texas. This is an important periodic test of our tools and procedures, to ensure the wikis will continue to be available even in the event of major technical issues in our primary home. It also gives all our SRE and ops teams a chance to do maintenance and upgrades on systems in Virginia that normally run 24 hours a day.
The switchover process requires a *brief read-only period for all Foundation-hosted wikis*, which will start at *14:00 UTC on Wednesday March 1st*, and will last for a few minutes while we execute the migration as efficiently as possible. All our public and private wikis will be continuously available for reading as usual, but no one will be able to save edits during the process. Users will see a notification of the upcoming maintenance, and anyone still editing will be asked to try again in a few minutes. CommRel has already begun notifying communities of the read-only window. A similar event will follow a few weeks later, when we move back to Virginia. This is currently scheduled for *Wednesday, April 26th*. If you like, you can follow along on the day in the public #wikimedia-operations channel on IRC (instructions for joining here <https://meta.wikimedia.org/wiki/IRC/Instructions>). To report any issues, you can reach us in #wikimedia-sre on IRC, or file a Phabricator ticket with the *datacenter-switchover* tag (pre-filled form here <https://phabricator.wikimedia.org/maniphest/task/edit/form/1/?projects=Datacenter-Switchover&subscribers=Clement_Goubert>); we'll be monitoring closely for reports of trouble during and after the switchover. (If you're new to Phab, there's more information at Phabricator/Help.) The switchover and its preparation are tracked tracked in Phabricator Task T327920 <https://phabricator.wikimedia.org/T327920> On behalf of the SRE team, please excuse the disruption, and our thanks to everyone in a number of departments who've been involved in planning this work for the past weeks. Feel free to reply directly to me with any questions. Thank you, -- Clément Goubert (they/them) Senior SRE Wikimedia Foundation
_______________________________________________ Wikitech-l mailing list -- wikitech-l@lists.wikimedia.org To unsubscribe send an email to wikitech-l-le...@lists.wikimedia.org https://lists.wikimedia.org/postorius/lists/wikitech-l.lists.wikimedia.org/
