Hello and welcome to the latest edition of the WMF Engineering Roadmap
and Deployment update.

The full log of planned deployments next week can be found at:
<https://wikitech.wikimedia.org/wiki/Deployments#Week_of_September_15th>

A quick list of notable items...

== Monday ==
* Revert Wikidata to a known-good version due to issues that were found
  on Thursday's deploy

* Update CentralNotice to remove dependency on jquery.json
** <https://gerrit.wikimedia.org/r/158103>

* Japanese Wikipedia to get Cirrus Search as the primary search
  experience


== Tuesday ==
*  Commons to will get the new CirrusSearch as the primary search engine

* MediaWiki deploy
** group1 to 1.24wmf21: All non-Wikipedia sites (Wiktionary, Wikisource,
   Wikinews, Wikibooks, Wikiquote, Wikiversity, and a few other sites)
** <https://www.mediawiki.org/wiki/MediaWiki_1.24/wmf21>


== Wednesday ==
* Russian Wikipedia to get Cirrus Search as the primary search
  experience


== Thursday ==
* MediaWiki deploy
** group2 to 1.24wmf21 (all Wikipedias)
** group0 to 1.24wmf22 (test/test2/testwikidata/mediawiki)

* There will be a method to opt-in to using the new HHVM-powered backend
  for all WMF wikis. It'll be implemented via a BetaFeature to make it
  as easy as possible for people to participate. There should be no
  noticeable negative impact and hopefully only positive impacts.


Thanks and as always, questions and comments welcome,

Greg

-- 
| Greg Grossmeier            GPG: B2FA 27B1 F7EB D327 6B8E |
| identi.ca: @greg                A18D 1138 8E47 FAC8 1C7D |

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