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From "Simon Willnauer (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3612) remove _X.fnx
Date Thu, 01 Dec 2011 06:49:41 GMT


Simon Willnauer commented on LUCENE-3612:

> remove _X.fnx
> -------------
>                 Key: LUCENE-3612
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Task
>    Affects Versions: 4.0
>            Reporter: Robert Muir
>         Attachments: LUCENE-3612.patch
> Currently we store a global (not per-segment) field number->name mapping in _X.fnx
> However, it doesn't actually save us any performance e.g on IndexWriter's init because
> since LUCENE-2984 we are to loading the fieldinfos anyway to compute files() for IFD,
> as thats where hasProx/hasVectors is.
> Additionally in the past global files like shared doc stores have caused us problems,
> (recently we just fixed a bug related to this file in LUCENE-3601).
> Finally this is trouble for backwards compatibility as its difficult to handle a global
> file with the codecs mechanism.

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