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In cloud environments, trust is necessary because services have the characteristics of uncertainty, dynamic, false or fraudulent which usually make users difficult to obtain desired services. In this paper, we consider trust-oriented workflow scheduling with temporal constraints including service setup times and workflow deadlines. The considered problem is mathematically modeled. A behavior-based...
In the paper, we consider the dynamic, elastic and flexible task scheduling problem in hybrid clouds. Tasks are linearly dependent, compute-intensive, stochastic, deadline-constrained and executed on elastic and distributed cloud resources. The objective is to finish all jobs before their deadlines with renting virtual machines as less as possible. Firstly, we propose two simple and fast dispatching...
The emergence of MapReduce, a simple software framework, is helping to deal with vast amount of data (multiterabyte data-sets) in-parallel on large clusters (thousands of nodes) of commodity hardware in a reliable, fault-tolerant manner. Extensive researches and popularity are gained by MapReduce recently. In this paper, we consider the MapReduce task scheduling problem with security and outage constraints,...
Cloud has become an attractive computing platform which offers seemly unlimited and computing resources to public. From perspective of data centers which offer cloud services, however, computing resources are limited and operating cost restricts cloud service quality. In order to balance between cost and service quality, the scheduling module, as the core component of the management system of data...
This paper considers the workflow scheduling problem in Clouds with the hourly charging model and data transfer times. It deals with the allocation of tasks to suitable VM instances while maintaining the precedence constraints on one hand and meeting the workflow deadline on the other. A bi-direction adjust heuristic (BDA) is proposed for the considered problem. Matching of tasks and the VM types...
In this paper, a multi-mode project scheduling problem with deadline constraints is considered to minimize the resource availability cost. Modes of each activity are associated with different durations and renewable resources. Three kinds of rules are developed for activity selection, mode assignment, and time decision, respectively. A lot of combinations of the three kind rules are compared and the...
In this paper, operators are encapsulated by services in algorithms for large-scale optimization problems and the services are deployed in distributed systems. Response time is an important factor for the performance of cooperative services. The message parse time is analyzed. Initial service accessing time is the main overhead for service calling. To decrease both the initial time and the response...
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