Thanks Philip for your crisp description of what happens with Thrift and PB. I had assumed that the community knows the difference between those systems and Avro. your description should help those who don't know and be refresher for those who know.
> What happens if the application doesn't recognize the branch number? If > you're a client of a get_person(id) call, and you were written when > Person_v1 was the only one in existence, Avro, today, would do just fine at > projecting Person_v2 down into Person_v1 for you. That's because your > reader schema would be v1, and you'd read some data written with v2, and > those are compatible. If you have a "version id", then it's hard to go do > compatibility of old readers reading new data. My proposal was: "3. Schemas match as per the current matching rules, even if the revisions do not match." That is, since Person_v2 and Person_v1 have the same name "Person" and different revisions v2 and v1, they would match according to the current rules. Thiru
