I am new to QLDB and seem to be finding slightly conflicting info on multi-Region architecture. I see that it has high availability in a given Region; however, it is unclear as to what happens when an entire Region goes down, or how I use it in a hot-hot multi-Region application.
Let's assume that an application is in US-East-2 and US-West-2 with latency routing rules. Each of these needs to write and read from the same ledger. Is this possible, or would the ledger need to exist in a single region and only one region can have full-access while the other would only have access to a read-only copy (maybe in S3)?
As of 21/6/2021 QLDB ledgers are in a single region. Cross-region business continuity is a need we have heard from other customers and we take this feedback very seriously. I will come back to this answer in the future when there is an update.