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Posted to oak-issues@jackrabbit.apache.org by "Ian Boston (JIRA)" <ji...@apache.org> on 2016/11/10 11:04:58 UTC

[jira] [Commented] (OAK-4943) Keep Lucene Commits so that if the Segments file gets corrupted recovery can be attempted.

    [ https://issues.apache.org/jira/browse/OAK-4943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15653769#comment-15653769 ] 

Ian Boston commented on OAK-4943:
---------------------------------

The WebConsole to analyse the Segments can be found here https://github.com/ieb/oakui

> Keep Lucene Commits so that if the Segments file gets corrupted recovery can be attempted.
> ------------------------------------------------------------------------------------------
>
>                 Key: OAK-4943
>                 URL: https://issues.apache.org/jira/browse/OAK-4943
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: lucene
>    Affects Versions: 1.6
>            Reporter: Ian Boston
>            Assignee: Chetan Mehrotra
>             Fix For: 1.6
>
>
> Currently, Lucene deletes all previous generations of the segments files as it has it uses the default IndexDeletionPolicy. Changing this to an IndexDeletionPolicy that keeps a number of previous segments files will allow an operator to find the most recent valid commit when the current segments file reports corruption. The patch found at https://github.com/apache/jackrabbit-oak/compare/trunk...ieb:KeepLuceneCommits keeps 10 previous commits.
> A more sophisticated policy could be used to save commits non-linearly over time.



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