Perhaps I should have been more specific in my initial post. I'm doing date-based boosting on the documents in my index, so as to assign a higher score to more recent documents. Currently I'm using a boost function to achieve this. I'm wondering if there would be a performance improvement if instead of using the boost function at search time, I indexed the documents with a date-based boost.
On Fri, Jun 4, 2010 at 7:30 PM, Erick Erickson <erickerick...@gmail.com>wrote: > Index time boosting is different than search time boosting, so > asking about performance is irrelevant. > > Paraphrasing Hossman from years ago on the Lucene list (from > memory). > > ...index time boosting is a way of saying this documents' > title is more important than other documents' titles. Search > time boosting is a way of saying "I care about documents > whose titles contain this term more than other documents > whose titles may match other parts of this query".... > > HTH > Erick > > On Fri, Jun 4, 2010 at 5:10 PM, Asif Rahman <a...@newscred.com> wrote: > > > Hi, > > > > What are the performance ramifications for using a function-based boost > at > > search time (through bf in dismax parser) versus an index-time boost? > > Currently I'm using boost functions on a 15GB index of ~14mm documents. > > Our > > queries generally match many thousands of documents. I'm wondering if I > > would see a performance improvement by switching over to index-time > > boosting. > > > > Thanks, > > > > Asif > > > > -- > > Asif Rahman > > Lead Engineer - NewsCred > > a...@newscred.com > > http://platform.newscred.com > > > -- Asif Rahman Lead Engineer - NewsCred a...@newscred.com http://platform.newscred.com
