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From "Chetan Mehrotra (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-4943) Keep Lucene Commits so that if the Segments file gets corrupted recovery can be attempted.
Date Thu, 01 Dec 2016 04:42:58 GMT

     [ https://issues.apache.org/jira/browse/OAK-4943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chetan Mehrotra updated OAK-4943:
---------------------------------
    Fix Version/s:     (was: 1.6)
                   1.8

> 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: 1.8
>
>
> 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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