db1071 is an old host which is out of warranty and needs to be decommissioned.
Also, the normalization of wikidatawiki.wb_terms will require a master with more throughput and more disk space for the next wb_term table redesign phases (T221764)
We want to failover db1071 to db1104.
When: Tuesday 30th July, 05:00AM-05:30 AM UTC
Impact: Writes to wikidatawiki will be blocked. Reads will remain unaffected.
We do not expect to use the full 30 minutes window, and rather use around 3-4 minutes if everything goes as expected