Hello, 

s3 master switchover will start in 1h: https://phabricator.wikimedia.org/T230783

List of affected wikis: https://raw.githubusercontent.com/wikimedia/operations-mediawiki-config/master/dblists/s3.dblist

Further, the host that will be replaced is db1075, which crashed yesterday evening due to HW malfunction: https://phabricator.wikimedia.org/T233534 

Thanks,

Manuel.

s3 was done successfully.

read only start: 05:10:14 UTC AM
read only stop: 05:13:08 UTC AM
total read only time: 2 minutes 54 seconds.

We had a slightly longer read only time compared to the all the previous ones due to some issues with the way we set read-only, those will be followed up at T233679

Thanks everyone who helped out
Manuel.