Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

Lightning Memory Database (LMDB) for Java: a low latency, transactional, sorted, embedded, key-value store

Oracle Coherence Community Edition

Fake implementation of MongoDB in Java that speaks the wire protocol.

All code samples, scripts and more in-depth examples for the book high performance in-memory computing with Apache Ignite. Please use the repository "the-apache-ignite-book" for Ignite version 2.6 or above.

An iterative computing framework for both Hadoop MapReduce and Hadoop YARN.

A fast in-memory multi-key counter store

cqrs是基于事件回溯的高性能架构，主要针对单个领域业务高度复杂且需要高性能的业务场景，可以说它能够作为高并发系统的通用解决方案。例如：秒杀、抢红包、12306卖票等。基于事件溯源，实现cqrs最复杂的模型， 通过事件是追加的特性，然后结合事件批量提交的手段，避免在高并发更新时多个线程update带来的严重锁冲突问题，从而来实现高性能。 支持聚合回溯，包括扩容、缩容聚合冲突事件回溯、聚合根在内存、聚合根快照、聚合事件组提交，可集成dubbo、spring cloud。

Run SQL queries on Java objects in a collection

A distributed in-memory key-value storage for billions of small objects.

Real-time message streaming over a Hazelcast in-memory data grid

Lightweight, super fast, atomic, transactional in-memory database

Code samples for the Speedment ORM

Read-only primitive Java arrays backed by Direct Buffers and indexed using 64-bit indexes

Embedded MongoDB for unit testing purposes based on flapdoodle-oss/de.flapdoodle.embed.mongo

Key-value Kafka Database

Spring Boot + Apache Camel + Saga EIP Test

In-memory Pure Java implementation to Redis useful for unit testing

A library that provides an in-memory instance of Confluent Schema Registry to run your tests against

[D2 CAMPUS FEST mini 최우수상 수상작] Distributed In-memory Key-value Store