On Sep 12, 2006, at 3:41 PM, Michael Imbeault wrote:
I haven't looked at the specifics of how MoreLikeThis determine
which items are similar; I'm mainly wondering about performance
here. Yesterday I tried to code myself a poor man's similarity
class (which was nothing more than doing a search with OR between
words and sorting by score), and the performance was abysmal (well,
I kinda expected it. 1000+ words queries on a 15 millions docs
collection, you don't expect miracles). At first glance I think it
searches for the most 'relevant' words, I'm I right? What kind of
performance are you getting with it?
Performance with MoreLikeThis is not an issue. It has many
parameters to tune how many terms are used in the query it builds,
and it pulls these terms in an extremely efficient manner from the
Lucene index.
I'm doing some traveling soon, which is always a good time to hack on
something tractable like adding MoreLikeThis to Solr. So your wish
may be granted in a week :)
Erik
