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. 

Apache Geode - Distributed, In-memory Database for Scale-Out Applications

Para was designed to be a simple and modular backend framework for object persistence and retrieval. It helps you build applications faster by taking care of the backend. It works on three levels - objects are stored in a NoSQL data store or any old relational database, then automatically indexed by a search engine and finally, cached. Para is also multitenant and has a clean and easy-to-use JSON API.

Para - The backend for busy developers

Off-Heap concurrent hash map intended to store GBs of serialized data. It has optional per entry or default TTL/expireAt, Entry eviction and expiration without a separate thread, Capable of maintaining huge amounts of cache memory, Suitable for tiny/small entries with low overhead using the chunked implementation.
 
OHC provides two implementations for different cache entry characteristics: - The _linked_ implementation allocates off-heap memory for each entry individually and works best for medium and big entries. - The _chunked_ implementation allocates off-heap memory for each hash segment as a whole and is intended for small entries.

Off-Heap concurrent hash map intended to store GBs of serialized data. It has optional per entry or default TTL/expireAt, Entry eviction and expiration without a separate thread, Capable of maintaining huge amounts of cache memory, Suitable for tiny/small entries with low overhead using the chunked implementation.

OHC - Java large off heap cache

Corfu is a consistency platform designed around the abstraction of a shared log. CorfuDB objects are in-memory, highly available data structures providing linearizable read/write operations and strictly serializable transactions. 
 
Corfu is built upon the abstraction of a distributed shared log. The Corfu infrastructure provides this log to clients, which use the log for coordination, communication and storage. The log is a highly available, dynamic and high performance scalable fabric: it is resilient to failures and can be reconfigured at any time.

Corfu is a consistency platform designed around the abstraction of a shared log. CorfuDB objects are in-memory, highly available data structures providing linearizable read/write operations and strictly serializable transactions

CorfuDB - A cluster consistency platform

A small library that provide a disk backed map implementation for storing large number of key value pairs. The map implementations (HashMap, HashTable) max out around 3-4Million keys/GB of memory for very simple key/value pairs and in most cases the limit is much lower. DiskBacked map on the other hand can store betweeen 16Million (64bit JVM) to 20Million(32bit JVM) keys/GB, regardless the size of the key/value pairs.

Disk-backed-map - A simple java disk backed map 

JetCache is a Java cache abstraction which provides consistent use for various caching solutions. Presently it support Redis and Alibaba Tair and Caffeine cache as embedded cache.
 
It simplifies cache operation with these key features:
like declarative caching using annotation with TTL(Time To Live) and two level caching support, Policy of key generation and value serialization can be custom, Detailed stat of each cache area, Asynchronous API and lot more.

JetCache is a Java cache abstraction which provides consistent use for various caching solutions. Presently it support Redis and Alibaba Tair and Caffeine cache as embedded cache.

 JetCache - Java cache abstraction which provides consistent use for various caching solutions

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Projects

Apache Geode - Distributed, In-memory Database for Scale-Out Applications

Para - The backend for busy developers

OHC - Java large off heap cache

CorfuDB - A cluster consistency platform

Disk-backed-map - A simple java disk backed map

JetCache - Java cache abstraction which provides consistent use for various caching solutions

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Projects

Apache Geode - Distributed, In-memory Database for Scale-Out Applications

Para - The backend for busy developers

OHC - Java large off heap cache

CorfuDB - A cluster consistency platform

Disk-backed-map - A simple java disk backed map

JetCache - Java cache abstraction which provides consistent use for various caching solutions

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