remove _X.fnx
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Key: LUCENE-3612
URL: https://issues.apache.org/jira/browse/LUCENE-3612
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, etc,
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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