Discussed different options for flow and packet marking implementation in dCache. Agreed that easiest would be to establish interface to flowd and let it handle both flow and packet marking.
dCache will need to implement a way how to detect start of the transfer as this is currently missing (end of transfers and bytes transferred is already done, src/dst ports can also be extracted). Flowd will need to implement a local interface and a communication protocol (flow marking is already done; Tristan is looking into packet marking). We have also agreed to align the developments with the WLCG monitoring task force which is also interested in this data.
We discussed proposal for HTTP-TPC protocol extension in the current technical specification. Following up on this few minor changes were made in the tech. spec.