Unfortunately, that patch stalled awaiting benchmarks, and now is
stale. Avro currently specifies a request and response payload
format, but does not say much about metadata. In an HTTP-based
transport, tracing might be done through headers. As we adapt
Hadoop's optimized RPC transport to support Avro messages we should
probably insert a generic metadata layer, analogous to HTTP's
headers, to support features such as this.
Doug
Doug,
This would be great. While it is always possible to add extension
data to the payload itself, having such support in the transport
itself can be quite useful, in my opinion. Especially if there are a
variety of different payloads, you don't have to extend each one.
-George
