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This document discusses B+-trees, which are commonly used to index data in databases. It provides an overview of the structure and functionality of B+-trees, including keys, pointers, fanout, leaf nodes, and internal nodes. It also describes Btree4j, an open source Java implementation of B+-trees that supports features like paging, prefix indexing, and bulk loading. The document aims to revisit th
TerichDB is an open source NoSQL data store based on terark storage engine. TerichDB is: Read optimized, faster than ever. Data is highly compressed and decompressed is not required before read. Use FSA and succinct technologies, totally different from B+ and LSM(Which is widely used in other data stores). Native support for regex expression query. Benchmark High Compression Ratio Higher than snap
Couchbase Server Couchbase Server is a high-performance, multipurpose database designed to help businesses across industries quickly and easily manage data for user profiles, dynamic product catalogs, apps, high-speed caching, hyperscale vector search, and advanced GenAI applications and agentic systems. Try It Now Architecture whitepaper What makes our enterprise database server different? Built
Online data science provides the students with a flexible and affordable path towards a very lucrative data science job. According to the bureau of Labor Statistics the projected employment growth for database administrators is 11% with the current average salary for database administrators standing at $87,020. The increasing popularity of data analytics and data base administrators adds to the ev
(Keep It) Simple Stupid Database KISSDB is about the simplest key/value store you'll ever see, anywhere. It's written in plain vanilla C using only the standard string and FILE I/O functions, and should port to just about anything with a disk or something that acts like one. It stores keys and values of fixed length in a stupid-simple file format based on fixed-size hash tables. If a hash collisio
Constant Database, known as cdb, is an elegant data structure proposed by D. J. Bernstein. It is suitable for looking up static data which is associated with arbitrary byte sequences (usually strings). Although DJB already explained this in his cdb page, it is not easy to implement this because his document lacks some important information such as the number of each subtable. Here I tried to illus
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