Hello,
We are planning to upgrade our Druid
<https://wikitech.wikimedia.org/wiki/Data_Platform/Systems/Druid> cluster
for analytics tomorrow morning (Wednesday 21st Jan 2026) at around 10:30
UTC.
The work is being tracked in: T278056 Upgrade Druid to version 26.0.0
<https://phabricator.wikimedia.org/T278056>
We expect the work to take around 1 hour, during which there will be
disruption to Turnilo
<https://wikitech.wikimedia.org/wiki/Data_Platform/Systems/Turnilo> and
any Superset
<https://wikitech.wikimedia.org/wiki/Data_Platform/Systems/Superset> dashboards
that read from Druid.
Please let us know if this will be highly inconvenient for you, for any
reason. If this should be the case, then we can look to defer and
re-schedule the upgrade.
If you have any queries or comments, please do get in touch.
Kind regards,
Ben
--
*Ben Tullis*(he/him)
Staff Site Reliability Engineer
Wikimedia Foundation <https://wikimediafoundation.org/>
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