Dynamic Adjustment of Serialization Order Using Timestamp Intervals in Real-Time Databases

Although an optimistic approach has been shown to be better than locking protocols for real-time database systems (RTDBS), it has the problems of unnecessary restarts and heavy restart overhead. In this paper, we propose a new optimistic concurrency control protocol called OCC-DATI. In OCC-DATI the number of transaction restarts is minimized by dynamic adjustment of the serialization order of the conflicting transactions. The need for dynamic adjustment of the serialization order is checked and the serialization order is updated in the validation phase. This provides more freedom to adjust the serialization order of conflicting transactions. OCC-DATI has several advantages over other optimistic concurrency control protocols. The protocol maintains all the nice properties with forward validation, a high degree of concurrency, freedom from deadlock, and early detection and resolution of conflicts, resulting in both less wasted resources and a smaller number of restarts. All of these are...

• Type: Conference
• Year: 1999
• Where: RTCSA
• Authors: Jan Lindström, Kimmo E. E. Raatikainen
• Keywords: Concurrency Control Protocols, Embedded Systems, Optimistic Concurrency Control, RTCSA 1999, Serialization Order