https://lists.ubuntu.com/archives/bazaar/2008q4/048879.html
observation about trac+bzr and bzr smart server with big repo
about tracobservationbzrsmartserver
https://web.archive.org/all/20060110150801/http:/www.dotclear.net/trac/about_trac
About Trac - DotClear - Trac
about tracdotclear