Hi lukai, thanks for the reply. Do you mean WAND is a way to resolve this issue? For "native support", do you mean there is no built-in (existing ready to use externally open source) module in Lucene to implement WAND? If so, the performance will really be bad.
regards, Lin On Sat, Mar 16, 2013 at 2:49 AM, lukai <lukai1...@gmail.com> wrote: > I had implemented wand with solr/lucene. So far there is no performance > issue. There is no native support for this functionality, you need to > implement it by yourself.. > > On Fri, Mar 15, 2013 at 10:09 AM, Lin Ma <lin...@gmail.com> wrote: > > > Hello guys, > > > > Supposing I have one million documents, and each document has hundreds of > > features. For a given query, it also has hundreds of features. I want to > > fetch most relevant top 1000 documents by dot product related features of > > query and documents (query/document features are in the same feature > > space). > > > > I am not sure how Lucene implement internally? If we have to go through > all > > one million document to dot product the query, then I am concerning about > > the performance. Appreciate if anyone could confirm (1) how Lucene works > > internally for this use case (2) any smart ideas to make improvement for > > query efficiency to select top 1000 documents? > > > > thanks in advance, > > Lin > > >
