OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
Implementation of various string similarity and distance algorithms: Levenshtein, Jaro-winkler, n-Gram, Q-Gram, Jaccard index, Longest Common Subsequence edit distance, cosine similarity ...
- java
- levenshtein-distance
- cosine-similarity
- string-distance
Neo4j Spatial is a library of utilities for Neo4j that faciliates the enabling of spatial operations on data. In particular you can add spatial indexes to already located data, and perform spatial operations on the data like searching for data within specified regions or within a specified distance of a point of interest.
- neo4j
- neo4j-database
- geoserver
- spatial-data
Secondary Index for HBase
An open-source columnar data format designed for fast & realtime analytic with big data.
- indexr
- columnar-storage
- olap
- datawarehouse
realtime search/indexing system
A search interface and wayback machine for the UKWA Solr based warc-indexer framework.
Please note that the warc-indexer tool & code is now supported by NetArchiveSuite. The 'warc-indexer' directory and code that exists in this repo is now only for reference. For support and issues of 'warc-indexer', please communicate with NetArchiveSuite.
The legacy distributed object storage server developed by PitchPoint Solutions can store billions of large and small files using minimal resources. Object data is stored in replicated volumes implemented like Facebooks Haystack Object Store. Object metadata which essentially maps an object name to a volume position is stored in an elasticsearch index. (Development by PitchPoint Solutions has been discontinued)
Simple full text indexing and searching library for Java
Web archive index server based on RocksDB
Parallel boolean circuit evaluation
- bitset
- boolean-circuits
- boolean-algebra
- bitmap