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|Chronicle Map||JetBrains Xodus|
|8 days ago||3 days ago|
|Apache License 2.0||Apache License 2.0|
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Off-heap memory in Java
2 projects | dev.to | 8 Apr 2021
Chronicle-Map: Chronicle Map is an in-memory, key-value store, designed for low-latency, and/or multi-process applications.
Solution for hash-map with >100M values
7 projects | /r/java | 21 Dec 2020
https://github.com/OpenHFT/Chronicle-Map - Maybe a better offheap map7 projects | /r/java | 21 Dec 2020
I've wrangled data sets in the ~600gb range using nothing but plain old Java and a few beefy boxes. This can all be kept in memory, but you have to go off-heap. You can use Chronicle Map and Chronicle Values to model this data and work with it off-heap in a way that's still very clean and object oriented. 128gb of RAM is cheap these days, whether you're in the cloud or not.
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Tracking mentions began in Dec 2020.
What are some alternatives?
MapDB - MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
Redisson - Redisson - Easy Redis Java client with features of In-Memory Data Grid. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, MyBatis, RPC, local cache ...
H2 - H2 is an embeddable RDBMS written in Java.
Spring Data JPA - Simplifies the development of creating a JPA-based data access layer.
Realm - Realm is a mobile database: a replacement for SQLite & ORMs
OrientDB - OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
Jedis - Redis Java client
MariaDB4j - MariaDB Embedded in Java JAR
OBridge - Java code generator for calling PL/SQL.
JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.