QeDB: A Quality-Aware Embedded Real-Time Database

QeDB is a database for data-intensive real-time applications running on flash memory-based embedded systems. Currently, databases for embedded systems are best effort, providing no guarantees on its timeliness and data freshness. Moreover, the existing real-time database (RTDB) technology can not be applied to these embedded databases since they hypothesize that the main memory of a system is large enough to hold all database, which can not be true in data-intensive real-time applications. QeDB uses a novel feedback control scheme to support QoS in such embedded systems without requiring all data to reside in main memory. In particular, our approach is based on simultaneous control of both I/O and CPU resource to guarantee the desired timeliness. Unlike existing work on feedback control of RTDB performance, we actually implement and evaluate the proposed scheme in a modern embedded system. The experimental results show that our approach supports the desired timeliness of transactions...

• Type: Conference
• Year: 2009
• Where: RTAS
• Authors: Woochul Kang, Sang Hyuk Son, John A. Stankovic
• Keywords: Data-intensive Real-time Applications, Embedded System, Memory-based Embedded Systems, Real-Time Technology, RTAS 2009