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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2017/08/04 08:21:00 UTC

[jira] [Created] (OAK-6519) Properly handle tail compactions in deduplication caches

Michael Dürig created OAK-6519:
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             Summary: Properly handle tail compactions in deduplication caches
                 Key: OAK-6519
                 URL: https://issues.apache.org/jira/browse/OAK-6519
             Project: Jackrabbit Oak
          Issue Type: Task
          Components: segment-tar
            Reporter: Michael Dürig
             Fix For: 1.7.6


This is a follow up to OAK-3349, which introduced tail compactions:

The deduplication caches currently only take the full generations into account and ignore the tail generations. Cache generations need to be a monotonically increasing, ordered sequence consisting of the full and tail part of the gc generation. See {{FileStoreBuilder.EvictingWriteCacheManager.evictOldGeneration}}. Optimally we find a way to decouple the segment generation from the cache generations as these are really separate concerns. 



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