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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 cannot be applied to these embedded databases since they hypothesize that the main memory of a system is large enough to hold all database, which cannot 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.
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