Good points. Both thrift and protobuf (and Avro) seemed heavy weight due to their requirements. We wanted something lightweight, thus BSON and MsgPack. In term

Good points. Both thrift and protobuf (and Avro) seemed heavy weight due to their requirements. We wanted something lightweight, thus BSON and MsgPack. In terms of rewriting a bunch of code, msgpack and bson both easily marshall/unmarshall in just a few lines of code so not a lot of rewriting. Libraries exist for all types of languages. Maybe I need to update my criteria. Thx for the comment tho.