I mean, I'm happy to have this argument. CEPH is content agnostic and that's fantastic most of the time. Cyrus replication is data aware, so it's not just replicating the data, it's doing integrity checking and data model consistency handling.

Most of all, it's doing split brain recovery; which - if we wanted CP rather than AP then we wouldn't need, but that wasn't the original design.

If I was redoing this from scratch, I'd maybe do Ceph or similar and update Cyrus to work well with it, but that would be a big change from the current design.

Anyway, I'm happy to stipulate that Ceph is great tech, without going and telling other people that it's the only choice.