All, The switchover work is done.
The site was was available to readers throughout the migration work though it was in read-only mode for about 32 minutes, when Asher and Mark had to migrate the database masters over from Tampa to Ashburn. We will cancel the reminding maintenance windows. Thank you all for your patience and understanding. Regards, CT Woo On Sat, Jan 19, 2013 at 10:57 AM, Ct Woo <ct...@wikimedia.org> wrote: > All, > > We will be proceeding with the datacenter switchover plan this coming > Tuesday (Jan 22, 2013), unless we discover some unexpected and > insurmountable issues in our tests between now and then. > > During the 8-hour migration window on the 22nd, 23rd and 24th (from 17:00 > UTC to 01:00 UTC hours / 9am to 5pm PST), there would be times (lasting > about 30 minutes) where the site would be set to "read-only" mode, to > facilitate master database switchovers from one datacenter to another. > While the site should be available to readers, no new contents could be > created, edited or uploaded. > > We are aware of the inconvenience and we have put together plans to > minimize such annoyances, e.g., automating much of the procedures, > mitigating known risks, and performing tests to identify issues prior to > deployment. Given the scale and complexity of this migration, we do realize > not all operational impact is predictable. Some users could experience > intermittent site unavailability and/or performance issues unfortunately. > > You can follow the migration on chat.freenode.net<http://irc.freenode.net> > (and not irc.freenode.org as mentioned in previous email) in the > #wikimedia-operations channel. > > Thanks, > CT Woo > > ---------- Forwarded message ---------- > From: Ct Woo <ct...@wikimedia.org> > Date: Fri, Jan 11, 2013 at 12:07 PM > Subject: Update on Ashburn data center switchover / migration – target > date is week of 1/22/13 > To: Wikimedia developers <wikitech-l@lists.wikimedia.org>, Development > and Operations Engineers <engineer...@lists.wikimedia.org> > > > All, > > The Migration team is in the last lap on completing the remaining tasks to > ready our software stack and Ashburn infrastructure for the big > switchover day. > > Per my last > update,<http://lists.wikimedia.org/pipermail/wikitech-l/2012-October/063668.html> > with the Fundraising activity behind us now, the team has scheduled the *week > of 22nd January*, 2013 to perform the switchover. We are going to block a > 8-hour migration window on the *22nd, 23rd and 24**th*. During those > periods, *17:00 UTC to 01:00 UTC hours (9am to 5pm PST*), there will be > intermittent blackouts and they will be treated as 'planned' outages. You > can follow the migration on irc.freenode.org in the #wikimedia-operations > channel. > > The team is putting the finishing touches to the last few tasks and we > will make the final Go/No decision on 18th Jan, 2013. An update will send > out then. For those interested in tracking the progress, the meeting notes > are captured on this wikitech > page<http://wikitech.wikimedia.org/view/Eqiad_Migration_Planning#Improving_Switchover> > . > > *Please note that we will be restricting code deployment during that > week, allowing only emergency and critical ones only.* > > Thanks. > > CT Woo > > > > > _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
