Yonik Seeley wrote: > Perhaps a ps2 parameter to match pf2? That might be nice.
I could try to put together such a patch if people were interested. One more thing I've been contemplating is if my results might be even better if I had a couple different "pf2"s with different "ps"'s at the same time. In particular. One with ps=0 to put a high boost on ones the have the right ordering of words. For example insuring that: "red hat black jacket" boosts only red hats and not black hats. And another pf2 with a more modest boost with ps=5 or so to handle the query above also boosting docs with "red baseball hat". Not sure of a good way to express that in config options, tho. > -Yonik > http://www.lucidimagination.com > > On Fri, Aug 13, 2010 at 2:11 PM, Ron Mayer <r...@0ape.com> wrote: >> Jayendra Patil wrote: >>> We pretty much had the same issue, ended up customizing the ExtendedDismax >>> code. >>> >>> In your case its just a change of a single line >>> addShingledPhraseQueries(query, normalClauses, phraseFields2, 2, >>> tiebreaker, pslop); >>> to >>> addShingledPhraseQueries(query, normalClauses, phraseFields2, 2, >>> tiebreaker, 0); >> Thanks!!! Indeed it seems to be providing better results for me (at first >> glance on a test system). >> >> Is there any way of lobbying to make this change in the official releases? >> >> >>> On Thu, Aug 12, 2010 at 1:04 PM, Ron Mayer <r...@0ape.com> wrote: >>>> Short summary: >>>> >>>> Is there any way I can specify that I want a lot >>>> of phrase slop for the "pf" parameter, but none >>>> at all for the "pf2" parameter? >>>> >>>> I find the 'pf' parameter with a pretty large 'ps' to do a very >>>> nice job for providing a modest boost to many documents that are >>>> quite well related to many queries in my system. >>>> >>>> In contrast, I find the 'pf2' parameter with zero 'ps' does >>>> extremely well at providing a high boost to documents that >>>> are often exactly what someone's searching for. >>>> >>>> Is there any way I can get both effects? >>>> >>>> Edismax's pf2 parameter is really nice for boosting exact [sub]phrases >>>> in queries like 'black jacket red cap white shoes'. But as soon >>>> as even a little phrase slop (ps) is added, it seems like it starts >>>> boosting documents with red jackets and white caps just as much as >>>> those with black jackets and red caps. >>>> >>>> My gut feeling is that if I could have "pf" with a large phrase >>>> slop and the pf2 with zero phrase slop, it'd give me better overall >>>> results than any single phrase slop setting that gets applied to both. >>>> >>>> Is there any good way for me to test that? >>>> >>>> Thanks, >>>> Ron >>>> >>>> >>
