Fwd: [Wikitech-l] More Update on Ashburn data center switchover / migration – target date is week of 1/22/13

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

Fwd: [Wikitech-l] More Update on Ashburn data center switchover / migration – target date is week of 1/22/13

Harsh Kothari
FYI
---
Harsh Kothari
Research Fellow, 
Physical Research Laboratory(PRL).
Ahmedabad.


Begin forwarded message:

From: Ct Woo <[hidden email]>
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 <[hidden email]>, Wikimedia Engineering <[hidden email]>
Reply-To: Wikimedia developers <[hidden email]>

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 <[hidden email]>
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 <[hidden email]>, Development and
Operations Engineers <[hidden email]>


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
[hidden email]
https://lists.wikimedia.org/mailman/listinfo/wikitech-l


_______________________________________________
Wikimediaindia-l mailing list
[hidden email]
To unsubscribe from the list / change mailing preferences visit https://lists.wikimedia.org/mailman/listinfo/wikimediaindia-l