[jira] [Commented] (LUCENE-2893) index upgrade tool for /dev-tools

["Erick Erickson (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17236199#comment-17236199 ] 

Erick Erickson commented on LUCENE-2893:
----------------------------------------

[~rcmuir] Should we close this one too?

> index upgrade tool for /dev-tools
> ---------------------------------
>
>                 Key: LUCENE-2893
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2893
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Robert Muir
>            Priority: Major
>         Attachments: LUCENE-2893.patch
>
>
> we change the index format from time to time, and people tracking trunk have to re-index.
> I think we should put a (unsupported, scary) tool in /dev-tools that uses the PreflexRW Codec to
> serialize the index to a 3.0 index (with your old trunk version), you can then deserialize it back 
> with the newer trunk version, to the newest StandardCodec.
> this won't prevent all reindexes, but would work for changes under codec control.
> mainly though, I think we could somehow add undeleteAll + this tool + apply deletes to prevent
> the painful reindexing of luceneutil benchmarking indexes :)



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