randomizing search results with even display chance

[Wouter Samaey <wo...@gmail.com>]

Hi,

I'm currently new at Lucene and Solr, but I've managed to get some
results so far, and like the project very much.
For my current project, I need to randomize the search results, but
still keep the sorting by relevance. For example, If 3 results have
the same score, they can be ordered 1-2-3, 2-1-3-, 3-2-1, 2-3-1, etc
with every new search.

And...another thing I'm interested in is how to make sure the
different results have equal display times if the scoring is the same.
If for example 20 results have the same score, and I only show 5 in my
app, I still want result nr 19 to be shown as many times as result 1,
because the score is the same.

I know a search engine is meant to rank result by score, but I want
every result (with the same score) to have the same "face time" by
randomizing the order.

Can anyone tell me if these things would be possible, and/or where to
start looking?

Thanks in advance

Re: randomizing search results with even display chance

[Yonik Seeley <yo...@lucidimagination.com>]

http://www.lucidimagination.com/search/document/1aa4debdfe46d824/random_search_result

For your case, sort by score first and the random field second.

sort=score desc, random84235 desc

-Yonik
http://www.lucidimagination.com


On Sun, Apr 19, 2009 at 10:22 AM, Wouter Samaey <wo...@gmail.com> wrote:
> Hi,
>
> I'm currently new at Lucene and Solr, but I've managed to get some
> results so far, and like the project very much.
> For my current project, I need to randomize the search results, but
> still keep the sorting by relevance. For example, If 3 results have
> the same score, they can be ordered 1-2-3, 2-1-3-, 3-2-1, 2-3-1, etc
> with every new search.
>
> And...another thing I'm interested in is how to make sure the
> different results have equal display times if the scoring is the same.
> If for example 20 results have the same score, and I only show 5 in my
> app, I still want result nr 19 to be shown as many times as result 1,
> because the score is the same.
>
> I know a search engine is meant to rank result by score, but I want
> every result (with the same score) to have the same "face time" by
> randomizing the order.
>
> Can anyone tell me if these things would be possible, and/or where to
> start looking?
>
> Thanks in advance
>