Ian Boston created OAK-4943:
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Summary: 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
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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