There are some semantic differences compared to POSIX filesystems. A couple big ones:
- You can only append to an object, and each object can only have one writer at the time. This is useful for distributed systems - you could have one process adding records to the end of a log, and readers pulling new records from the end.
- It's also possible to "finalize" an object, meaning that it can't be appended to any more.
Slight nit: "zonal" doesn't necessarily mean "not replicated", it means that the replicas could all be within the same zone. That means they can share more points of failure. (I don't know if there's an official definition of zonal.)
I don't know of a single GCP product that's been shut down, although I could be missing something. But their track record for GCP is, I think, what you would want a cloud provider's record to be.
(I should mention that I work for GCP. But this is just based on my own memory.)
Got it, thank you! CockroachDB is the only one I know offhand that does what you're looking for. Another comment mentioned Vitess, which might also work.
It seems like there are a lot of options for large scale analytics, but I don't know a lot for high throughout geo-redundant transaction processing.
(I work on Rapid storage.)