Like any organism, databases must evolve when dropped into a new environment. A new type of DBMS, the in-memory database system (IMDS), represents the latest step in adaptation to embedded systems. Designed to meet the performance needs and resource availability in embedded systems, IMDSes reside entirely in memory–they never go to disk. Beyond the elimination of disk I/O, in-memory database systems have fewer “moving parts” or interacting processes than traditional databases, leading to greater frugality in RAM and CPU use and faster overall responsiveness.

This Linux Journal article by McObject CEO and Co-Founder Steve Graves offers a highly readable introduction to IMDS principles. It addresses key IMDS differences in areas including caching and transaction processing, and includes an application scenario illustrating a typical embedded device-based deployment.

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