FYI --- Harsh Kothari Research Fellow, Physical Research Laboratory(PRL). Ahmedabad.
Begin forwarded message: > From: Ct Woo <ct...@wikimedia.org> > Subject: [Wikitech-l] More Update on Ashburn data center switchover / > migration – target date is week of 1/22/13 > Date: 20 January 2013 12:27:28 AM GMT+05:30 > To: Wikimedia developers <wikitec...@lists.wikimedia.org>, Wikimedia > Engineering <engineer...@lists.wikimedia.org> > Reply-To: Wikimedia developers <wikitec...@lists.wikimedia.org> > > 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 <wikitec...@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 > wikitec...@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikitech-l
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