hamsterdb is a lightweight embedded "NoSQL" key-value store. It concentrates on ease of use, high performance, stability and scalability.

Ease of Use
The hamsterdb API is simple and self-documenting. Extensive documentation, FAQ and a tutorial are provided. The interface is similar to other widely-used database engines. APIs for Java, Python, .NET (i.e. C#, VB.NET) and Erlang are also available.
High Performance
Fast algorithms and data structures guarantee high performance for all scenarios. The implementation of these algorithms minimizes disk access and operating system calls (i.e. memory allocations). Data structures try to take advantage of modern CPU caches. Memory mapped file operations are preferred to the slower read/write I/O.
Mature and Production Proof
hamsterdb has a mature code base which is in development since 2004. More than 1800 unittests and 45000 acceptance tests verify high quality. Applications using hamsterdb are deployed on tens of millions of desktops, but also on cloud instances, cell phones and other embedded devices.
Written in standard C/C++, hamsterdb runs or has been reported to run on many architectures: Intel-compatible (x86, x64), PowerPC, SPARC, ARM, RISC and others. The file format is endian-independent. more »
Feature Rich
hamsterdb is slim and lightweight and still offers all the features that you would expect from an embedded database, including transactions, recovery, cursors, in-memory databases, duplicate keys, auto-incrementing keys ("Record numbers"), remote databases with an embeddable http-based server (or a standalone http daemon) and many other features. more »
Liberal Licensing
hamsterdb is licensed under Apache Public License 2.0 and can be used freely for any purpose, including distribution and modification in closed source, commercial applications. more »


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