Apache Lucene 5 - New Features & Improvements for Apache Solr
summary
Lucene 5 focuses on data safety and operational stability: it moves to Java 7/NIO.2 (recommended Update 55), adds checksums during merging and per-segment unique IDs to detect corruption and safe replication, and tightens codec APIs for stable upgrades. It introduces automatic SSD detection (Linux-only), automatic merge throttling, new compact bitset types and Accountable memory reporting to cut heap use, a common FilterCache for Solr/Elasticsearch, and enables Solr 5 runs as a server out of the box with init.d scripts and Zookeeper-managed config.
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chapters (13)
- 0:00Introduction to Lucene 5
- 3:28Index format and codec changes
- 11:07Removal of Lucene 3 index format
- 14:06Index file consistency checks
- 17:14Java 7 support and improvements
- 22:37Directory metadata and Java 9 compatibility
- 27:12Java 7 IO API changes
- 30:04Codec component rewrite
- 32:20SSD-aware indexing merging
- 33:50Heap usage optimization
- 36:05Filter API changes
- 38:25Term positions and API updates
- 40:01Numeric range queries and conclusion
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