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From Tom Burton-West <>
Subject Re: Superset Similarity?
Date Fri, 16 Nov 2012 22:18:33 GMT
Hi Otis,

I hope this is not off-topic,

Apparently in Lucene similarity does not have to be set at index time:

See under Lucene
"All models default to the same index-time norm encoding as
DefaultSimilarity, so you can easily try these out/switch back and
forth/run experiments and comparisons without re-indexing."

Does Solr expose this ability to change similarities without re-indexing?
 i.e could you just change your schema?


On Thu, Nov 15, 2012 at 11:31 PM, Otis Gospodnetic <> wrote:

> Hi,
> Somebody asked about BM25 on solr-user and comparison to other relevancy
> scoring methods.  Similarity has to be set at index time and should not be
> changed... but is there any one Similarity that happens to be a superset of
> them all, so that one can use that Similarity during indexing, and then
> switch to other Similarities to query time?  I doubt it, but....maybe, just
> maybe... :)
> Thanks,
> Otis
> --
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