Performance Evaluation of Transaction Processing in Mobile Data Base Systems

Abstract

Specific characteristics of mobile environments make traditional transaction management techniques no longer appropriate. This is due the fact that the ACID properties of transactions are not simply followed, in particular the consistency property. Thus, transaction management models adopting weaker form of consistency are needed and these models can now tolerate a limited amount of consistency. In this paper we evaluate our execution framework on different mobile computation modes using different execution strategies. Moreover, the effects of the fixed host transaction are identified and included in the evaluation The integration between wired and wireless environments confirms that the execution strategy is critical for the performance of a system. Neither MHS nor FHS are optimal in all situations and the performance penalties and wasted wireless resources can be substantial. A combined strategy CHS over MCA-FSA computation model matches the best performance of the FHS and MHS and shows better performance than both in many cases.