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eXtremeDB/rt is the first and only deterministic embedded database management system for mission- and safety-critical hard real-time applications.

Modern avionics and aircraft navigation systems, driver assistance systems, critical medical equipment and similar systems’ data management is complex, often non-interruptible and have strict requirements for timely execution. Those requirements are defined as real-time constraints on the systems’ temporal behavior. The eXtremeDB/rt pioneering design addresses those constraints through preserving the temporal validity of data and enforcing predictable execution of critical data transactions.

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Review the datasheet

To Err is Human. The Case for Buy Over Build in Hard Real-time Database Management Systems

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Q & A: what distinguishes a true, real-time deterministic embedded database?

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Watch Is Hard Real-time Possible with a DBMS? Requirements for a DBMS to succeed in hard real-time systems.

What sets eXtremeDB/rt apart?

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Deterministic ACID-compliant transactions

eXtremeDB/rt provides transaction semantics for passing the transaction’s deadline and transaction priority to the database scheduler, while the eXtremeDB/rt kernel enforces these deadlines. At the same time, the kernel preserves strong internal database consistency through enforcing the ACID transactions’ properties.

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Adaptable real-time transaction managers

The eXtremeDB/rt transaction manager is based on a preemptive High Priority Earliest Deadline First (EDF) scheduling algorithm. An alternative transaction manager makes use of the priority inheritance protocol (PIP) implemented by most modern real-time operating systems. Regardless of the choice, the real-time transactions deadlines are fully enforced.

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No restrictions on execution patterns

The eXtremeDB/rt transaction managers adapt to the underlying OS schedulers, yet do not make any assumptions about transactions patterns and/or the applications’ data flow. The schedulers can handle periodic and aperiodic transactions and do not require any execution-time estimates to enforce transactions’ deadlines.

Highly configurable database kernel

While preserving fully deterministic real-time transaction control, the eXtremeDB/rt kernel can be easily tailored for the specific needs of target applications. Source-code level kernel configurations can include only features required by the target applications, excluding unnecessary database management code.

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Broad RTOS Support

In order to satisfy hard real-time requirements, the eXtremeDB/rt target applications must run in the context of a real-time operating system. eXtremeDB/rt is available for all major commercial RTOS including those that are certified to airborne safety (DO-178B/C ) and automotive safety (ISO 26262) specifications on selected hardware.

Tailored to your needs


The nature of eXtremeDB/rt’s tight integration with the RTOS and target hardware requires that each evaluation package be assembled uniquely for your needs.  Please contact us so that we can gather information on your RTOS vendor, version, target hardware, tool chain, and so on.

View the ever-expanding list of supported real-time operating systems.

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Give us a call

+1-425-888-8505

Desktop distributions

Free desktop evaluation packages of eXtremeDB/rt for Linux, MacOS, QNX and Windows platforms are available for immediate no-hassle download. Learn more about the programming interface and various real-time and non-real-time features of eXtremeDB/rt. After you have tried the desktop version, we hope you’ll contact us for a free trial of eXtremeDB/rt tailored to the needs of your RTOS.

You are also welcome to contact us, and we will send you a download of eXtremeDB/rt running in the FreeRTOS simulator.

News and articles about real-time database management.

COTS Cover photo July 2022

"Soft v Hard Real-time Systems" Embedded Computing, November 4, 2022

Real-time transaction timeline

"Embedded Databases in Real-Time Systems" CircuitCellar.com, March 14, 2022

Steve Graves, President and CEO, McObject

"Embedded Executive: Steve Graves, President and CEO, McObject" EmbeddedComputing.com, January, 2022 An interview reviewing key concepts in real-time computing.

COTS article about eXtremeDB/rt

"Databases in Hard Real Time" McObject Launches True Real-Time Deterministic Database for embOS Real-time Operating System Applications, Wilmott.com, October 15, 2021

COTS article about eXtremeDB/rt

"Keeping A Mission-Critical Deterministic DBMS On Time" by McObject CTO Andrei Gorine EmbeddedComputing.com, September 20, 2021

COTS article about eXtremeDB/rt

"Real time tasks need real time data" Read the Wind River blog, September 7, 2021

We’re grateful for the partnerships we have with industry leaders, and invite you to read what they say about eXtremeDB/rt in our joint press releases.

Azure RTOS ThreadX

“Managing data with a hard real-time requirement is a challenge for developers,” comments Tony Shakib, Partner General Manager, Microsoft Azure IoT. “Developers have had to use current solutions that may not meet time constraints or write their own database system. eXtremeDB/rt brings a solution to Microsoft Azure developers that eliminates this trade off.”

Read the joint press release.

DDC-I’s Deos

eXtremeDB/rt provides an excellent option for developers of resource-constrained, mission-critical embedded systems who require a compact, real-time embedded database,” said Greg Rose, vice president of marketing and product management at DDC-I. “We look forward to working with McObject to offer eXtremeDB/rt to embedded developers utilizing our Deos real-time operating system.”

Read the joint press release.

embOS from SEGGER

SEGGER’s CEO, Ivo Geilenbruegge, had this to say: “We are excited that McObject has created a first-of-its-kind real-time database system to complement our embOS RTOS and extend support for hard real-time systems to include database operations. Real-time systems are following the trend of embedded systems in that they are being called upon to manage more (and more complex) data.”

Read the joint press release.

FreeRTOS

Richard Barry, FreeRTOS founder, said “It is good to have another high-quality option for FreeRTOS users, this time providing a real-time deterministic database which can, as just one example, fulfill a crucial role in the Industrial Internet of Things (IIoT): data collection, aggregation, and distribution in oil rig blow-out prevention (BOP) systems. A BOP is a specialized device equipped with sensors to detect a “kick” and actuate valves to prevent a catastrophic blowout.” Richard continued, “The need to detect and respond within deadlines is emblematic of real-time industrial systems.”

Read the press release.

INTEGRITY from Green Hills Software

Joe Fabbre, Global Technology Director for Green Hills had this to say: “McObject has created a unique real-time database that complements our INTEGRITY RTOS and extends hard real-time support to database operations. Advanced applications in real-time systems are being called upon to manage more (and more complex) data. eXtremeDB/rt gives developers of these systems an off the shelf solution for real-time data management.”

Read the joint press release.

LynxOS

“We were delighted to work with McObject to bring eXtremeDB/rt to the LynxOS partner ecosystem. Our companies share the vision that real-time systems are becoming more sophisticated and consequently have to manage more complex data. eXtremeDB/rt fills a critical gap in the technology stack,” said Pavan Singh, VP of product management, Lynx Software Technologies.

Read the joint press release.

QNX Neutrino RTOS

“Real-time performance can benefit embedded software developers in many market segments including autonomous systems, industrial control, robotics and medical devices,” said Romain Saha, Strategic Alliances Director at BlackBerry QNX: “McObject builds upon many years of QNX support by bringing eXtremeDB/rt to the latest version of the QNX Software Development Platform.”

Read the joint press release.

SIEMENS Nucleus RTOS

“McObject’s eXtremeDB/rt allows Nucleus customers to have a truly embedded database solution that allows them to meet the determinism they require in a commercial-off-the-shelf solution.” said Jeff Hancock, Siemens Embedded Senior Product Manager. “eXtremeDB/rt helps Nucleus customers manage ever-growing data requirements.”

Read the joint press release.

WindRiver VxWorks

“Through our work with McObject, we’re helping customers modernize and accelerate the delivery of reliable intelligent systems that demand real-time requirements,” said Michel Chabroux, Senior Director, Product Management, Wind River. “We look forward to building on our proven track record of success with McObject to help advance the next generation of cloud-connected intelligent systems with increasingly challenging edge compute needs.”

Read the joint press release.