We have 5 regions across 3 continents. What’s the best way to set that a cluster? I assume it would be best to put 1-2 Zero instances on each continent and then 2-3 alpha’s in every region. If I did --replicas=5, how could I ensure that at least 1 replica is in each region? Instead, would it be better to do 3 alpha’s in each region and have each region be their own cluster? If a whole region went down then I’d lose that “group” but it might be better for write latency?
From what I can tell, unless I do a best-effort, read-only query, it’ll need to hit the Zero leader, so if I setup cross-continent zero’s then I’ll have to incur the cost of a cross-region lookup no matter what, even for reads, so is it better to just setup a cluster in a single region only and so I only have to take the latency hit once when sending the query (instead of potentially multiple times as the alpha node needs to request zero or alpha leaders).