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Hi,
We're currently applying schema changes from WMF for a MediaWiki upgrade. To reduce replication lag, we will first apply them to an inactive server for each cluster, then switch users to that server and apply them on the other one. The first part has started now, and we will be switching in an hour or two.
During the second part, user databases will be unavailable until we finish the changes and switch back. This may take several hours to finish.
The exception is s2/s5, which only has one server; these clusters will be lagged during the change.
- river.
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Hi,
The schema changes are now complete; unfortunately it took slightly longer than expected. During the maintenance I switched the primary server for s[3467] from hyacinth to cassia. hyacinth will be unavailable until tomorrow, so for now these clusters only have a single server.
- river.
toolserver-announce@lists.wikimedia.org