Reducing Electric Energy Consumption of Servers in Multi-version Timestamp Ordering Algorithm.

The Multi-Version Timestamp Ordering (MVTO) algorithm is so far proposed to implement the Multi-Version Concurrency Control (MVCC). The MVTO algorithm can enhance the concurrency of transactions but does not consider the electric energy consumption to perform transactions. The Energy-Saving Multi-Version Timestamp Ordering with Virtual Machines (ESMVTO-VM) algorithm is proposed to not only enhance the concurrency of transactions but also reduce the electric energy consumption of servers in our previous studies. In this paper, an Improved ESMVTO-VM (IESMVTO-VM) algorithm is newly proposed to more reduce the electric energy consumption of servers by improving the ESMVTO-VM algorithm. The electric energy consumption of servers is shown to be more reduced in the IESMVTO-VM algorithm than the ESMVTO-VM algorithm in evaluation.