<div dir="ltr"><div>Hello admins from Cloud and Analytics groups,</div><div><br></div><div>There is some extended maintenance scheduled for databases on eqiad while it is a passive datacenter for mediawiki in the upcoming datacenter switchover (as a reminder, the switchover will happen between 19 April and 3 May.).</div><div><br></div><div>Services themselves will not be affected (labs and analytics servers are not to be touched), but due to high priority schema changes and other cleanup work that cannot be done otherwise, replication from production (codfw, Texas-mediawiki) to labs and analytics replicas may lag for some hours at times. This is unavoidable because both LabsDBs and analytics is eqiad-(Virginia datacenter) only. I hope you believe me that I am sorry for the inconveniences, but the improvements not only will make mediawiki better, also will impact positively your replica services (faster and more reliable propagation of changes).</div><div><br></div><div>* Services affected: extended lag compared to production on labsdb replicas (old and new) for tools and cloud, analytics store, analytics slave (mediawiki data)</div><div>* Services definitely not affected: toolsdb, eventlogging, postgres, osm, any other service not related to databases</div><div><br></div><div>Details:</div>* <a href="https://phabricator.wikimedia.org/T155099">https://phabricator.wikimedia.org/T155099</a> (DBA task for maintenance coordination)<div>* Internal draft for the blog post soon to be published: <a href="https://office.wikimedia.org/wiki/Community_Liaisons/codfw#Initial_blog_post">https://office.wikimedia.org/wiki/Community_Liaisons/codfw#Initial_blog_post</a><br clear="all"><div><br></div><div>Up to you if and when you want to announce it in advance. I am available for questions an clarifications. Again, my apologies,<br></div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>Jaime Crespo<br></div><<a href="http://wikimedia.org" target="_blank">http://wikimedia.org</a>><br></div></div>
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