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This paper describes a database system with tenant technology on Eucalyptus platform for a rural drinking water supply system. This database use a sharing model to store data and a tenant placement algorithm to properly put tenants in virtual machine therefore it can ensure the service quality for the tenants with the minimum use of hardware resources. The experiment results show that the tenant placement...
Reusable anonymous return channels proposed by Golle and Jakobsson allow any recipient of one of the anonymous messages in a mix net to send back one or more replies directly. Yet their protocol has an obvious efficiency problem caused by multiple rounds of message processing. In this paper, we introduce a technique which is based on universal re-encryption and increases the total efficiency of reusable...
Nowadays, increasing importance has been attached to power management in modern data centers. A lot of solutions have been produced to reduce power consumption without producing an effect on quality of service. One common way is to associate with virtualization technology that has been widely used in data centers. This is due to not only its features of reliability and ease of management,but also...
Virtualization Technology has been employed increasingly widely in modern data centers in order to improve its energy efficiency. In particular, the capability of virtual machine(VM) migration brings multiple benefits for such as resources(CPU, memory, et al.) distribution, energy aware consolidation. However, the migration of virtual machines itself brings extra power consumption. For this reason,...
Today's data center often employs virtualization to allow multiple enterprise applications to share a common hosting platform in order to improve resource and space utilization. It could be a greater challenge when the shared server becomes overloaded or enforces priority of the common resource among applications in such an environment. In this paper, we propose Apad, a feedback-based resource allocation...
Database audit can strengthen the security of database. Logging database activities is usually the first step of implementing database audit. In this paper, we present a logging scheme for database audit. Unlike native database logging and auditing mechanism, our scheme is to monitor and log database activities through analyzing network traffic. The architecture of our scheme contains three principal...
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