He Xiaoqiao created CARBONDATA-452:
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Summary: Optimize structure of Dictionary use Trie in place of
HashMap
Key: CARBONDATA-452
URL: https://issues.apache.org/jira/browse/CARBONDATA-452
Project: CarbonData
Issue Type: Improvement
Components: core
Affects Versions: 0.2.0-incubating
Reporter: He Xiaoqiao
Assignee: He Xiaoqiao
Priority: Critical
CarbonData apply ConcurrentHashMap to maintain Dictionary currently, and memory
footprint is considerable overhead cause it has to load whole Dictionary to
decode actual data value, especially column cardinality is a large number.
Update Dictionary using Trie in place of HashMap to reduce memory footprint and
improve retrieval performance.
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