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Apache Ignite - High performance in-memory data grid
Apache Ignite In-Memory Data Fabric is a high-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time, orders of magnitude faster than possible with traditional disk-based or flash technologies.
cache distributed-caching in-memory database-cache jcache key-value-store session-cacheApache Derby - Relational Database implemented in Java
Apache Derby is an open source relational database implemented entirely in Java. It has a small footprint that makes it easy to embed in any Java-based application, but it also supports the more familiar client/server mode. It is based on the Java, JDBC, and SQL standards, making code developed more portable to standards-compliant databases.
database embedded-database in-memory relational-databaseHazelcast - In-Memory Data Grid for Java
Hazelcast is a clustering and highly scalable data distribution platform for Java. It supports Distributed implementations of java.util.{Queue, Set, List, Map}, java.util.concurrency.locks.Lock, java.util.concurrent.ExecutorService, Distributed Indexing and Query support, Dynamic scaling, partitioning with backups, fail-over, Web-based cluster monitoring tool and lot more.
cache cluster datagrid distributed-cache in-memory java-collection map java-utilityH2 Database - Java based Database Engine
H2 database is very fast, open source database engine. It supports SQL and JDBC standards. It can run in Embedded and Server mode and it has clustering support.
database cluster relational full-text-search embedded-database in-memoryApache Arrow - Powering Columnar In-Memory Analytics
Apache arrow is an open source, low latency SQL query engine for Hadoop and NoSQL. Arrow enables execution engines to take advantage of the latest SIMD (Single input multiple data) operations included in modern processors, for native vectorized optimization of analytical data processing. Columnar layout of data also allows for a better use of CPU caches by placing all data relevant to a column operation in as compact of a format as possible.
in-memory analytics query-engine nosql no-sqlApache Geode - Distributed, In-memory Database for Scale-Out Applications
Apache Geode is distributed, in-memory database for scale-out applications. All data is stored in-memory for low latency. Performance scales linearly as nodes are added. Data is distributed automatically between nodes to optimize performance. Clusters fail-over to other nodes in case of failures, and rebalance remaining resources. Geode servers can be configured to talk memcached protocol.
cache key-value-database key-value-store persistence in-memory distributed clusterGraphlite - Embedded graph databases for Python
Graphlite is an embedded graph databases for Python. Graphlite aims to change that by building a simple and fast graph layer over SQLite. Similar to FlockDB, Graphlite only stores adjacency lists, but they can be queried in the style of normal graph databases, e.g. with traversals.
graph-database nosql in-memory graph-store embeddedSTINGER - In-memory graph store and dynamic graph analysis platform
STINGER is a package designed to support streaming graph analytics by using in-memory parallel computation to accelerate the computation. STINGER is composed of the core data structure and the STINGER server, algorithms, and an RPC server that can be used to run queries and serve visualizations.
graph-database graph-analysis graph-analytics nosql in-memoryHazelcast Jet - Distributed data processing engine, built on top of Hazelcast
Hazelcast Jet is a distributed computing platform built for high-performance stream processing and fast batch processing. It embeds Hazelcast In Memory Data Grid (IMDG) to provide a lightweight package of a processor and a scalable in-memory storage. It supports distributed java.util.stream API support for Hazelcast data structures such as IMap and IList, Distributed implementations of java.util.{Queue, Set, List, Map} data structures highly optimized to be used for the processing
data-grid data-processing data-streaming in-memory batch-processing stream-processingMapDB - Embedded Database Engine
MapDB is an embedded database engine. It provides Maps and other collections backed by disk or memory storage. It offers excellent performance comparable to java collections, but is not limited by GC overhead. It is also a full database engine with storage backends, transactions, cache algorithms, expiration and many other options. MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap memory.
embedded-database database java-collections off-heap cache in-memory key-value-storePincaster - NoSQL Database with a HTTP/JSON interface
Pincaster is an in-memory, persistent data store for geographic data and key/dictionary pairs, with replication and a HTTP/JSON interface.
database geographic-database in-memorynitro - A high performance in-memory index storage engine
A high performance in-memory key-value item storage engine written in golang. The storage engine is based lock-free data structures and scales well with multicore CPUs.
key-value storage-engine embedded in-memory cache