Currently before a datacenter switchover, we hardcode the more_like queries to go to the active datacenter so that after the switchover when caches are cold, it still has a hot cache. After ~24h the caches are warmed up enough and the hardcoding is removed.
Ideally this process would be automated potentially by:
- Replicating cache
- A cookbook to warm up the cache ahead of time
- Deciding that it's fast enough with the cold cache (likely what would happen in an emergency) and no longer require manual intervention