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Posted to dev@ranger.apache.org by "Madhan Neethiraj (Jira)" <ji...@apache.org> on 2022/09/28 05:43:00 UTC

[jira] [Created] (RANGER-3934) improve tag cache handling to reduce resource usage

Madhan Neethiraj created RANGER-3934:
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             Summary: improve tag cache handling to reduce resource usage
                 Key: RANGER-3934
                 URL: https://issues.apache.org/jira/browse/RANGER-3934
             Project: Ranger
          Issue Type: Improvement
          Components: admin
            Reporter: Madhan Neethiraj
            Assignee: Madhan Neethiraj


Ranger admin server maintains a cache of tags so that requests from plugins can be served as quickly as possible. If there were changes to tags since the cache was last loaded/updated, the cache is refreshed. Ranger supports an option to record the changes and apply them on top of existing cache - this minimizes the resources (memory, CPU) needed to rebuild the cache. The cache update implementation can be optimized to minimize objects loaded from db, and also replace use of Map with Set in several places.



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