D1’s read replicas [1] is still pretty new, how has this worked out for a read-heavy workload like FlagShip?
[1] https://blog.cloudflare.com/building-d1-a-global-database/#s...
D1 read replication was not available when I started working on FlagShip. However, since I only use D1 for storing data like project configuration, replication was not really necessary.
The flags consumed by the clients are pushed to and read from KV alone. KV already has geo replication out of the box, although there still is propagation delay for updates to KV.
It would be nice to have everything served from D1, I might consider it when replication is stable enough.