The easiest/best solution (after talking through IRC) is to document using a new cache cluster for the upgraded side. This has the downside of cache-mismatch (everything should be pointed at the new / upgraded side).
I think this is best handled with a documentation change covering the dual cache setup.
The easiest/best solution (after talking through IRC) is to document using a new cache cluster for the upgraded side. This has the downside of cache-mismatch (everything should be pointed at the new / upgraded side).
I think this is best handled with a documentation change covering the dual cache setup.