[Zope-dev] Conflict reduced BTrees for cataloging

I am working on a CMS on top of ZODB for large amounts of large SGML/XML documents. To speed things up, a colleague started two import processes and we get incredible amounts of "database read conflict error"s from cataloguing (although we already use "QueueCatalog" for most indexes). I think, the data structures used for cataloguing and indexing could have a "def _p_independent(self): return 1". Does anybody objects? If not, I will implement "_p_independent" BTrees and friends. Dieter