High-Performance Java-Native-Persistence. Store and load any Java Object Graph or Subgraphs partially, Relieved of Heavy-weight JPA. Microsecond Response Time. Ultra-High Throughput. Minimum of Latencies. Create Ultra-Fast In-Memory Database Applications & Microservices.

A fast, log structured key-value store.

网络硬盘是通过存储、分类、检索、分享、协作、下发、回收、展示等方式管理文档、文件、图片、音频、视频等资料的工具。网络硬盘擅长在国产的私有化环境中管控文档权限、存储空间分配、安全加密、链接分享，同时支持一定轻量级的文件任务收发。网络硬盘需要依赖开源的数字底座进行人员岗位管控。

High-Performance Java-Native-Persistence. Store and load any Java Object Graph or Subgraphs partially, Relieved of Heavy-weight JPA. Microsecond Response Time. Ultra-High Throughput. Minimum of Latencies. Create Ultra-Fast In-Memory Database Applications & Microservices.

TuplDB is a high-performance, concurrent, transactional, scalable, low-level embedded database.

FireflyDB is a fast, thread-safe, JVM-based key-value storage engine with microsecond latency.

BBoxDB is a scalable, highly available, and distributed data store for multi-dimensional big data. The software supports operations like multi-dimensional range queries and spatial joins. In addition, data streams are supported.

Tiny Database: Query Engine, Storage Engine, Calcite, ANTLR

Docs: https://docs.microstream.one/enterprise/

Official Java binding for TidesDB

MineDB，storage engine based on disk balance plus tree

A minimal educational relational database management system (RDBMS) implemented in Java 17. The project demonstrates a custom SQL processing pipeline, including lexer, parser, semantic analysis, query planning, optimization, and execution. It features a storage engine with heap pages, a buffer pool, and supports indexing using B-trees and Hash

LSMTree-based level-compacted thread-safe persistent key-value store.

Multiple column family benchmark against RocksDB

Handler to manage cached, expiring and persistent stores.

A fast, log structured key-value store.

A Java library for efficiently storing and retrieving large key-value maps.

Rogue planets are starless planets, scientifically adrift in the cosmic dark alone

Bytevault is a high-performance, thread-safe, disk-based key-value store inspired by Bitcask.

📊 Explore GEBODIKBD, a minimal educational relational DBMS in Java 17, showcasing core database concepts through a client-server architecture.