Since session writes are rare and usually on post, in the hot/warm case, we can keep the same redis setup of masters in one DC and slaves in another and issue writes to masters. A BagOStuff class that did this would be useful.
Related Gerrit Patches:
|mediawiki/core : master||Add a ReplicatedBagOStuff class|
|Open||aaron||T88445 MediaWiki active/active datacenter investigation and work (tracking)|
|Resolved||aaron||T88634 Make a ReplicatedBagOStuff class for multi-DC use|