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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