How does asynchronous replication differ from “point-in-time replication”?
Technically, point-in-time replication is a subset of one of the ways to do asynchronous replication, in that since asynchronous just means that you’re not forcing the write to be acknowledged, before you acknowledge the write back to the primary application. What point-in-time replication means is that you take a snapshot at a certain time, typically once an hour. Then your replication product looks at the bytes that have been changed in between the last snapshot and the current snapshot and then replicates those bytes necessary to create those points in time at the replication destination. So some of them can continually replicate and then will take a snapshot at the source site. Then it will just replicate that status to the other side. But the big difference is that with a point-in-time replication system, you have one or many points-in-time to go back to if one you have with corruption. With asynchronous replication, depending on how to up to date you are, you’re continually copyi
