Hi Erick - Maybe I mis-wrote.
My question is: would "title:any_query^4.0" be faster/slower than applying index time boost to the field title. Basically, if I take *every* user query and search for it in title with boost (say, 4.0) - is it different than saying field title has boost 4.0? Cheers, Girish Redekar http://girishredekar.net On Sun, Nov 22, 2009 at 2:02 AM, Erick Erickson <erickerick...@gmail.com>wrote: > I'll take a whack at index .vs. query boosting. They are expressing very > different concepts. Let's claim we're interested in boosting the title > field.... > > Index time boosting is expressing "this document's title is X more > important > > than a normal document title". It doesn't matter *what* the title is, > any query that matches on anything in this document's title will give this > document a boost. I might use this to give preferential treatment to all > encyclopedia entries or something. > > Query time boosting, like "title:solr^4.0" expresses "Any document with > solr > in > it's title is more important than documents without solr in the title". > This > really > only makes sense if you have other clauses that might cause a document > *without* > solr the title to match...... > > Since they are doing different things, efficiency isn't really relevant. > > HTH > Erick > > > On Sat, Nov 21, 2009 at 2:13 AM, Girish Redekar > <girish.rede...@aplopio.com>wrote: > > > Hi , > > > > I'm relatively new to Solr/Lucene, and am using Solr (and not lucene > > directly) primarily because I can use it without writing java code (rest > of > > my project is python coded). > > > > My application has the following requirements: > > (a) ability to search over multiple fields, each with different weight > > (b) If possible, I'd like to have the ability to add extra/diminished > > weights to particular tokens within a field > > (c) My query strings have large lengths (50-100 words) > > (d) My index is 500K+ documents > > > > 1) The way to (a) is field boosting (right?). My question is: Is all > field > > boosting done at query time? Even if I give index time boosts to fields? > Is > > there a performance advantage in boosting fields at index time vs at > using > > something like fieldname:querystring^boost. > > 2) From what I've read, it seems that I can do (b) using payloads. > However, > > as this link ( > > > > > http://www.lucidimagination.com/blog/2009/08/05/getting-started-with-payloads/ > > ) > > suggests, I will have to write a payload aware Query Parser. Wanted to > > confirm if this is indeed the case - or is there a out-of-box way to > > implement payloads (am using Solr1.4) > > 3) For my project, the user fills multiple text boxes (for each query). I > > combine these into a single query (with different treatment for contents > of > > each text box). Consequently, my query looks something like (fieldname1: > > queryterm1 queryterm2^2.0 queryterm3^3.0 +queryterm4)^1.0 Are there any > > guidelines for improving performance of such a system (sorry, this bit is > > vague) > > > > Any help with this will be great ! > > > > Girish Redekar > > http://girishredekar.net > > >
