Very large in-memory database: in our benchmark, eXtremeDB-64 scales beyond 1.17 TB & delivers 87.78 million transactions/second.

Free, on-demand Webinars! Topics include High Availability, key embedded database selection criteria, and more.

Get Perst, the open source, object-oriented embedded database for Java and .NET.

What's new in eXtremeDB embedded database version 4.0? Improved concurrency, KD-Tree support and more! Read about it.

New Embedded Systems Design article details eXtremeDB in-memory database's role in F5 Networks' BIG-IP application delivery device.

eXtremeDB-64 scales massively as Web cache for Tagged’s social networking application! Read the press release.

Perst Lite brings embedded database superpowers to Carbon Hero’s Java ME app. Learn more.

McObject alliance with G3Tek aims at Turkey’s fast-growing embedded technology sector. Get details...

McObject expands in China, adding a team in Beijing with deep experience in embedded database systems.

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Perst - An open source, object-oriented embedded database

Perst is McObject's open source, dual license, object-oriented embedded database system (ODBMS). It is available in one edition developed as an all-Java embedded database, and another implemented in C# (for Microsoft .NET Framework applications).

Perst gives developers the ability to sort, store and retrieve objects in their applications with maximum speed and with low memory and storage overhead, while leveraging the object-oriented paradigm of Java and C#.

Perst Features and Benefits
Perst Lite for Java ME (J2ME)
Overview: Perst Embedded Database Specification
In-Depth Information: Perst Introduction and Tutorial (PDF / 38 pages)
Performance Benchmarks: PolePosition and TestIndex
Perst and the Android platform

Perst downloads:
Perst software (includes complete source code)
Perst documentation

 

Open Source, Dual Licensed

Whether you’re developing open source software or a proprietary, commercial product, McObject has Perst licensing options that fit.

Users can redistribute and/or modify Perst under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

For projects that don't fit under the GPL, a commercial license for Perst may be purchased from McObject. McObject also offers Perst product support.