Hello Serge, Interesting informations are available here : https://dev.lsstcorp.org/trac/wiki/Summer2013/ConfigAndStackTestingPlans/DedupeForcedSources Thanks for your offer to help with partitioner, i could contact you soon. Have a nice day, 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