Hi,
No action required. Just a heads up.
Since there were some problems around machine capacities, slow queries and subsequent slave lag and alarms in the past months, springle suggested to point the s[23467]-analytics-slave aliases to the new analytics-store machine. That should kill some of the problems at the root.
This migration gets tracked in Bug 66068 [1].
No action is required from you, the change should be transparent. Keep using the aliases in the same manner as you did up to now. This email is merely a heads up about the switch.
Have fun, Christian
[1] https://bugzilla.wikimedia.org/show_bug.cgi?id=66068