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From Abhay Kulkarni <akulka...@hortonworks.com>
Subject Re: Review Request 68101: RANGER-2173: Optimize Trie constuction and Policy lookup
Date Sun, 05 Aug 2018 00:20:24 GMT

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(Updated Aug. 5, 2018, 12:20 a.m.)

Review request for ranger, Madhan Neethiraj, Mehul Parikh, Pradeep Agrawal, Ramesh Mani, and
Velmurugan Periasamy.


A string comparison needs to case-insensitive if optIgnoreCase condition is true for the resource.

Bugs: RANGER-2173

Repository: ranger


Ranger uses Trie data structure to look up policy resources for efficient access. Trie tree
may be optimized to contain fewer nodes and can be made less deep. This will allow faster
construction of Trie tree and faster lookup for a resource. This is done by using longest
common prefix strings instead of single character to organize Trie tree. Also added instrumentation
to measure performance.

Diffs (updated)

  agents-common/src/main/java/org/apache/ranger/plugin/util/RangerResourceTrie.java 1723d1416

Diff: https://reviews.apache.org/r/68101/diff/5/

Changes: https://reviews.apache.org/r/68101/diff/4-5/


Passes all unit tests


Abhay Kulkarni

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