Comment by zinodaur

We've been exploring ways of getting external consistency for our data model - but our Sequencers are different enough that I don't think we can use the FoundationDB approach.

We are trying out a version of what CockroachDB does - run transaction A possibly on stale data, spy on the things it reads, call our flavor of ReadVersion for the "shards" the transaction interacted with, and re-run transaction A with the data versions we got from ReadVersion. It will usually just return after the the first run, rarely requiring a second run, and in some pathological cases require infinite runs.