We’ve been running the train since version 1.20, and we believe a more frequent train will be easier, faster, and safer.

There are unknowns in this process. Our goal is to surface the unknowns to increase the safety and speed of deployment.

Please reach out* if you would like to be in closer contact with our team as part of this process.

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📅 Schedule

Join us in #wikimedia-operations IRC and #engineering-all slack for all the excitement. We’re also planning to use Google Meet sessions for pairing.

If you’re interested in joining a session (and you’ve signed an NDA) sign up (with an email that can join a meet) on the trainsperiments page on MediaWiki.

Here’s the schedule—two trains in 24 hours to start the week:

• Mon, 21 March 2022

• UTC AM Train – 09:00 :

• +0 minutes – 1.39.0-wmf.1 Group0

• +30m – 1.39.0-wmf.1 Group1

• UTC PM Train – 18:00:

• +0 minutes – 1.39.0-wmf.1 All Wikis

• +30m – 1.39.0-wmf.2 Group0 (Δ 10 hours)

• +45m – 1.39.0-wmf.2 Group1

• +90m – 1.39.0-wmf.2 All Wikis

• Tue, 22 March 2022

• UTC AM Train – 09:00:

• +0 minutes  – 1.39.0-wmf.3 Group0 (Δ 14 hours)

• +15m – 1.39.0-wmf.3 Group1

• +60m – 1.39.0-wmf.3 All Wikis

• Wed, 23 March 2022

• UTC PM Train – 18:00

• +0 minutes – 1.39.0-wmf.4 Group0 (Δ 20 hours)

• +15m – 1.39.0-wmf.4 Group1

• +60m – 1.39.0-wmf.4 All Wikis

• Thu, 24 March 2022

• UTC AM Train ­– 09:00: Catchup and cleanup

• UTC PM Train ­– 18:00: Catchup and cleanup