[jira] Updated: (LUCENE-1260) Norm codec strategy in Similarity

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-1260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-1260:
--------------------------------

    Attachment: LUCENE-1260_defaultsim.patch

Here's a patch for the general case, and it also adds a warning
that you should set your similarity with Similarity.setDefault, especially if you omit norms.

We can backport this to 3.x

The other cases involve fake norms, which I think we should completely remove in trunk
with LUCENE-2846, then there is no longer an issue and we can remove the warning in trunk.


> Norm codec strategy in Similarity
> ---------------------------------
>
>                 Key: LUCENE-1260
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1260
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>    Affects Versions: 2.3.1
>            Reporter: Karl Wettin
>            Assignee: Michael McCandless
>             Fix For: 4.0
>
>         Attachments: Lucene-1260-1.patch, Lucene-1260-2.patch, Lucene-1260.patch, LUCENE-1260.txt, LUCENE-1260.txt, LUCENE-1260.txt, LUCENE-1260_defaultsim.patch
>
>
> The static span and resolution of the 8 bit norms codec might not fit with all applications. 
> My use case requires that 100f-250f is discretized in 60 bags instead of the default.. 10?

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