Hello everyone,
I hope I have included all the relevant teams, please add anyone I
might have forgotten
As you probably know, Ops has decided to perform a datacenter
switchover this quarter. It's already close to 1.5 years[1] since the
last one and we 've been wanting to do more like 1 per year. Our
tracking task is https://phabricator.wikimedia.org/T199073 and work
has already started in various sub areas. One thing that we need to
decide on is the actual dates. Having looked at the various
possibilities and the work that needs to be done up to that point, we
have come to the conclusion that the weeks of
* 17-21 Sept 2018
* 24-28 Sept 2018
for the switchover and
* 08-12 Oct 2018
* 15-19 Oct 2018
for the switch back.
Keep in mind that this time around we want to do at least 3 weeks, 1
more week than the previous switchover, so if we do choose the week of
24-29 Sept for the switchover, we have to do the week of 15-19 for the
switchback.
We also need to decide on the actual time of the date of course. So
this is your invitation to a scheduling meeting about discussing that.
Remembering the previous switchover's scheduling meeting I think that
coming up with a proposal that can be discussed individually/per team
before the large meeting can be beneficial.
So here's a proposal that just copies the previous
switchover/switchback schedule [1]
Switchover:
Services: Tuesday, September 18th 2018 14:30 UTC
Media storage/Swift: Tuesday, September 18th 2018 15:00 UTC
Traffic: Tuesday, September 18th 2018 19:00 UTC
Mediawiki: Wednesday, September 19th 2018: 14:00 UTC
Switchback:
Traffic: Tuesday, October 9th 2018 19:00 UTC (and maybe some prep work
on Monday)
Mediawiki: Wednesday, October 10th 2018: 14:00 UTC
Services: Thursday, October 11th 2018 14:30 UTC
Media storage/Swift: Thursday, October 11th 2018 15:00 UTC
Now as for the meeting date, google for this week suggested August 1st
14:00 UTC as the time with the least possible conflicts, so here it
is.
[1] https://wikitech.wikimedia.org/wiki/Switch_Datacenter
Regards,
--
Alexandros Kosiaris <akosiaris@wikimedia.org>
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