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For hard real-time systems

Maximize Database Reliability

Features to look for in a reliable database management system.

What do we mean by reliability?

Database system reliability encompasses protection from loss of database availability, safeguards on data integrity, and resistant to database corruption caused by application software defects.  eXtremeDB was designed from the beginning to maximize database reliability.

Features to look for if reliability matters

ACID-compliant transactions

eXtremeDB’s transactions support the ACID (Atomic, Consistent, Isolated and Durable) properties. This feature safeguards data integrity by guaranteeing that interdependent operations either complete together or are cancelled together.  Learn more about this and other key features.

Transaction logging

Transaction logging provides recoverability. While it might seem that transaction logging re-introduces on-disk storage overhead into in-memory databases (IMDS), McObject’s benchmark tests confirm that an IMDS with transaction logging still outperforms a traditional “on-disk” DBMS performing the same tasks, even when the on-disk database is fully cached.

Non-volatile memory support

Using non-volatile memory as storage, in-memory databases gain durability while keeping high performance. (For more in this topic, please review McObject’s white paper, Database Persistence, Without the Performance Penalty.)

High Availability

eXtremeDB’s high availability option ensures continuous database operation even in the face of hardware or software failure. eXtremeDB’s HA support includes both synchronous (2-safe) and asynchronous (1-safe) replication, with application-directed failover.


eXtremeDB’s clustering capability adds reliability via the presence of multiple, synchronized database instances maintained on two or more cluster nodes.

Advanced debugging and corruption prevention

The database runtime implements many verification traps and consistency checks. After application debugging, the optimized version of the eXtremeDB runtime can be used, removing traps and internal checks, and restoring valuable clock cycles. In addition, cyclic redundancy check (CRC) is built into the backup-and-restore feature for in-memory databases, to ensure the database was written in its entirety when saved, and has not been corrupted.  Learn more in our online documentation.

An additional benefit of using cyclic redundancy check is to detect unauthorized tampering with the database contents (without going through the eXtremeDB run-time). 

Type-safe API

eXtremeDB’s native C/C++ API is type-safe, so that any errors in data-typing are caught at compile time.  Read Toward self-diagnostic APIs for embedded systems, by McObject CEO Steve Graves, or visit our online documentation for more detailed information on this topic.

Built-in security features

eXtremeDB multi-layered security offers AES encryption and employs a user-provided cipher to prevent access or tampering. The Secure Sockets Layer (SSL) and Transport Layer Security (TLS) is supported in all communications (client/server, High Availability and Cluster).

Active Replication Fabric

eXtremeDB’s Active Replication Fabric has the capability to replicate data from the edge to the server, potentially through many tiers. It will intelligently queue data during network malfunctions or outages for later synchronization, and offers reliable database management for IoT systems.

Used in systems that cannot afford to fail, from nuclear power plants to military aircraft.

eXtremeDB sets the standard in database management system reliability.  Industry leaders around the world depend on eXtremeDB for reliable embedded database management.


Read about Active Replication Fabric in our on-line documentation

Read Justifiably Taboo: Avoiding malloc-free APIs In Military/Aerospace Embedded Code. Dynamic memory allocation can cause latency and unpredictability. This Military Embedded Systems article by McObject CEO Steve Graves provides an alternative.

See a complete list of eXtremeDB features, including the type-safe native API, that maximize database reliability and flexibility.


Real-time systems require predictable response times, and need to be deterministic.  Learn more about eXtremeDB/rt for hard real-time systems.

Only the most reliable DBMS can be used in MILAERO and nuclear power plant systems

Operator Interface for the transportation subsystem, Radioactive Waste Treatment Facility, Smolensk Nuclear Power Plant. Real-time data populating the BISMARC interface is drawn from the eXtremeDB in-memory database. Read more in this Control Engineering article.

Related resources

Articles for Professional Developers


Watch Webinars by McObject experts to learn more about database reliability and optimization

Webinars for Professional Developers

Watch to on-demand Webinars, hosted by experts, about proven database management system practices.  We invite you to watch:

Review our list of Webinars

chart with text explaining a hybrid DBMS

White Papers for Professional Developers

McObject is continually researching, testing, improving on, and retesting our software in order to provide our clients with the best possible data management solutions. We invite you to read “Data Management for Military and Aerospace Embedded Systems” and more.

Review our research