Dear Yvan and Fabio, My notes are here. I've added some remarks next to a discussion with Jacek: https://confluence.lsstcorp.org/pages/viewpage.action?pageId=20284906 Feel free to edit it. Cheers, Fabrice ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1