Today while testing the DC switchover scripts, we noticed x2 is already read-write in codfw. The live test script made x2 in codfw read-only triggering a page. Based on reading T269324: Productionize x2 databases and comments from @Krinkle, this seems intentional.
So how should x2 be treated during the switchover? Can we ignore it entirely and leave it read-write in both DCs during the switchover?
Or should it go read-only in both DCs and then post-switchover made read-write in both DCs?
@Krinkle suggested to "treat it like parser cache", which would be the former option of ignoring it entirely.