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From "Doron Cohen (JIRA)" <>
Subject [jira] Commented: (LUCENE-756) Maintain norms in a single file .nrm
Date Thu, 21 Dec 2006 15:53:22 GMT
    [ ] 
Doron Cohen commented on LUCENE-756:

> Does this mean a separate file outside the final .cfs files? 

Oh no - there's a single .nrm file in the .cfs file (instead of multiple .fN files in the
.cfs file). 
As before, only .sN files (separated norm files) are outside of .cfs file.

> Maintain norms in a single file .nrm
> ------------------------------------
>                 Key: LUCENE-756
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Doron Cohen
>         Assigned To: Doron Cohen
>            Priority: Minor
>         Attachments: nrm.patch.txt
> Non-compound indexes are ~10% faster at indexing, and perform 50% IO activity comparing
to compound indexes. But their file descriptors foot print is much higher. 
> By maintaining all field norms in a single .nrm file, we can bound the number of files
used by non compound indexes, and possibly allow more applications to use this format.
> More details on the motivation for this in:
(in particular

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