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From "Earwin Burrfoot (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (LUCENE-1654) Include diagnostics per-segment when writing a new segment
Date Fri, 22 May 2009 21:28:46 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712269#action_12712269
] 

Earwin Burrfoot edited comment on LUCENE-1654 at 5/22/09 2:26 PM:
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Let's have string key-value pairs per-segment, per-commit, per-index?
Lucene can store debugging data there, user can add something if he needs.

We can design some unified metadata interface available through IndexReader and won't expose
SegmentInfo (doing this with our current back-compat policies is akin to suicide)

      was (Author: earwin):
    Let's have string key-value pairs per-segment, per-commit, per-index?
Lucene can store debugging data there, user can add something if he needs.
  
> Include diagnostics per-segment when writing a new segment
> ----------------------------------------------------------
>
>                 Key: LUCENE-1654
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1654
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 2.9
>
>
> It would be very helpful if each segment in an index included
> diagnostic information, such as the current version of Lucene.
> EG, in LUCENE-1474 this would be very helpful to see if certain
> segments were written under 2.4.0.
> We can start with just the current version.
> We could also consider making this extensible, so you could provide
> your own arbitrary diagnostics, but SegmentInfo/s is not public so I
> think such an API would be "one-way" in that you'd have to use
> CheckIndex to check on it later.  Or we could wait on such extensibility
> until we provide some consistent way to access per-segment details
> in the index.

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