This is similar to how java.util.concurrent.atomic.LongAdder works:

https://github.com/openjdk/jdk/blob/master/src/java.base/sha...

Are there are any other approaches for this problem? Seems like there should be.

It's an interesting approach. In similar cases has anyone got experience using a database more optimized on writes, e.g. Cassandra?

phillip it's called lock striping