RDM Embedded Edition is a high-performance, database management system optimized for the operating systems commonly used within the embedded market. It is ideal for standalone applications such as those found in industrial automation controllers or automobile infotainment systems. Multiple APIs provide developers a multitude of programming options and functionality. However, developers only compile in what they need keeping the application footprint minimal for these traditionally resource constraint devices.
RDM Embedded SQL has been designed for embedded systems applications. As such, it provides a subset of the ANSI/ISO standard SQL that is suitable for running on a wide variety of computers and embedded operating systems many of which have limited computing.
The ACID compliant database engine supports B-tree and hash indexes; the B-tree indices can support simple and/or compound keys. Additionally the database engine has been developed to fully utilize multi-core processors, run within minimal memory, and support both in-memory and on-disk storage. Implemented as a linkable library the database is allowed to become an embedded part of your applications.
View RDM Embedded Plus Edition for additional functionality. The Plus Edition includes everything in RDM Embedded Standard, and also contains extra features for optimal performance.
Efficiently allocate transaction processing to take advantage of multi-core systems for optimal speed.
Multi-Versioning Concurrency Control (MVCC)
Implement read-only-transactions where a virtual snapshot of your embedded database is readable until the read-only-transaction is terminated by the task, even if it is being concurrently updated. Avoid read locks to improve multi-user performance.
Pure and Hybrid In-Memory Database Operation
Configure your database to run completely on-disk, completely in-memory, or a hybrid of both; combining the speed of an in-memory database and the stability of on-disk in a single system.
Multiple Indexing Methods
Use B-Trees or Hash Indexes on tables. Hashing on large volumes often provides faster access to data than b-tree indexing methods. Hashing enhances speed by using buckets to store the index information.
RDM Embedded Technical Specifications
Database
Maximum Databases Open Simultaneously: No Limit
Maximum Records Per Database: No Limit
Maximum Size of Database File: Limited only by file system
Maximum Tables Per Database: No Limit
Maximum Records Per Table: No Limit
Maximum Record Size: 32 kb (excluding BLOB or VARCHAR)
Maximum Fields Per Table: No Limit
Maximum Keys Per Database: No Limit
Maximum Size of Keys: 242 bytes
RAM Requirements: User configurable, minimum 50 kilo bytes
Code Footprint: Starting at ~270 kb, depending on OS and database features
Modes of Operation
Standalone
Application Linked
Multiple APIs: for Enhanced Usability
Navigational C API
For well over 25 years developers have been using RDM’s low-level C API of over 200 intuitive easy to use functions provides application developers with ultimate control of the database.
Comprehensive SQL API
RDM’s SQL is accessed internally through an easy-to-use API designed by Raima. This non-standard API is simpler than ODBC. In fact, our ODBC API is based on this one.
Standards Based ODBC API
Following the ODBC standards Raima developed the ODBC API to provide developers with a familiar way to utilize the power of the RDM database engine.
Object Oriented C++ API
The C++ API was designed with ease of use as its primary requirement while still providing developers with full access and control to both RDM’s network and relational functionality.
RDM Embedded Plus Edition contains additional features to enhance the development experience. Unique to the Plus package is the replication and mirroring functionality that enables greater availability and scalability.
Easily achieve true horizontal scaling across clustered or distributed systems without the need to re-write of your application.
True Global Queries
Connect any application to one or more databases and query them as if it is a single instance. Perform global, locally or across a network, to multiple database instances with no regard for where the data is located.
Master-Slave Database Replication
Create applications that replicate data between different databases on different systems, on the same system, in memory and on disk. Asynchronously replicate your data between different database instances, schemas, and systems. Allows developers to create a heavily indexed persistent query database while capturing data through a non-indexed in-memory database.
3rd Party Replication
The automated database schema translator seamlessly transforms data from native RDM to SQL enabling effortless data flow into the enterprise. The result is the ability to combine near real-time critical operational data with other data sources to provide the complete information to make more intelligent business decisions at any level of your organization.
Master/Slave Mirroring
Data redundancy without sacrificing performance! Master-Slave mirroring introduces data redundancy by automatically mirroring the application database locally or across a network.
Synchronous or Asynchronous Mirroring
Designed for carrier grade systems the new mirroring engine is designed to remove any single point of a failure in your fault-tolerant system.
APIs
Navigational C API
For well over 25 years developers have been using RDM’s low-level C API of over 200 intuitive easy to use functions provides application developers with ultimate control of the database.
Comprehensive SQL API
RDM’s SQL is accessed internally through an easy-to-use API designed by Raima. This non-standard API is simpler than ODBC. In fact, our ODBC API is based on this one.
Standards Based ODBC API
Following the ODBC standards Raima developed the ODBC API to provide developers with a familiar way to utilize the power of the RDM database engine.
Object Oriented C++ API
The C++ API was designed with ease of use as its primary requirement while still providing developers with full access and control to both RDM’s network and relational functionality.
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