* Only use [DCB](https://github.com/johanhaleby/occurrent/issues/166) * Add a "globalposition" using snowflake (see [issue](https://github.com/johanhaleby/occurrent/issues/169)) * Catch-up subscriptions and subscriptions etc should be based on global position and not "time" if oplog is unavailable * Add "transactionid" (UUID) to each write operation
