Just spotted this and wondered if it might be of interest to people working on Zope's indexing capacity .. http://www.gnu.org/software/mifluz/description.en.html The purpose of GNU mifluz is to provide a C++ library to build and query a full text inverted index. It is dynamically updatable, scalable (up to 1Tb indexes), uses a controlled amount of memory, shares index files and memory cache among processes or threads and compresses index files to 50% of the raw data. The structure of the index is configurable at runtime and allows inclusion of relevance ranking information. The query functions do not require to load all the occurences of a searched term. They consume very few resources and many searches can be run in parallel. -- Jean Jordaan Upfront Systems http://www.upfrontsystems.co.za