User talk:68.233.214.74/signpost idea
On Wednesday, 19 April 2017, at 14:00 (UTC), all MediaWiki wikis will be in read-only mode for about 20-30 minutes. This is because the WMF will be switching over to the secondary data center in Dallas, Texas. [1]
This is a planned test, and it is to make sure that MediaWiki wikis can stay online after a disaster.[1] It is planned to show the feasibility of switching from one data center to the other.
The traffic will switch back on Wednesday, 3 May 2017 at 14:00 (UTC).[1] This will also cause read-only mode for 20-30 minutes.
Schedule
[edit]A partial schedule of events, adapted from here is:
- First, they will stop the job queues in active sites.
- Next, they will deploy mediawiki-config w/ all shards set to read-only.
- Then, they will lock down the database masters.
- After that, the active datacenter configuration will be switched.
- This will continue with applying configuration.
- Then they will undo read-only mode.
- After that, a few quick tests from the new server, and back to editable version.[2]
To send traffic stats back to the normal data center, they will do the transfer back following roughly the same schedule.
Technical problems
[edit]A problem with this? The non essential code deployments aren't happening.
From the Signpost
[edit]Thanks for the submission above. It would have been a worthy item if we had been publishing on a reasonable schedule; unfortunately, we were not. I'll try to find out how well the test went, and rewrite to reflect the results, since an announcement is no longer relevant. -Pete Forsyth (talk) 18:37, 9 May 2017 (UTC)
- ^ a b c "Tech/Server switch 2017". meta.wikimedia.org. Retrieved 3 April 2017.
- ^ "Switch Datacenter". wikitech.wikimedia.org. Retrieved April 3, 2017.