Performance Improvement of Cloud Computing Data Centers Using Energy Efficient Task Scheduling Algorithms

Cloud computing is a technology that provides a platform for the sharing of resources such as software, infrastructure, application and other information. It brings a revolution in Information Technology industry by offering on-demand of resources. Clouds are basically virtualized datacenters and applications offered as services. Data center hosts hundreds or thousands of servers which comprised of software and hardware to respond the client request. A large amount of energy requires to perform the operation.. Cloud Computing is facing lot of challenges like Security of Data, Consumption of energy, Server Consolidation, etc. The research work focuses on the study of task scheduling management in a cloud environment. The main goal is to improve the performance (resource utilization and redeem the consumption of energy) in data centers. Energy-efficient scheduling of workloads helps to redeem the consumption of energy in data centers, thus helps in better USAge of resource. This is further reducing operational costs and provides benefits to the clients and also to cloud service provider. In this abstract of paper, the task scheduling in data centers have been compared. Cloudsim a toolkit for modeling and simulation of cloud computing environment has been used to implement and demonstrate the experimental results. The results aimed at analyzing the energy consumed in data centers and shows that by having reduce the consumption of energy the cloud productivity can be improved.


INTRODUCTION
This constitutes cloud computing, the evolution of cloud computing, other technologies related like grid. It also discuss characteristics of cloud, cloud computing services. The evolution of the cloud goes phase by phase that include the Grid Computing, Distributed Computing. Cloud computing is used first in 1950s, the time during which large-scale mainframes were available in the business industry. The hardware used by the mainframe was installed in a big room and all users are accessing the mainframe through terminals. Later in the year 1970, the IBM launches OS having a number of virtual machines at a single machine. The Virtual machine Operating System has taken the application of 1950s, that is of sharing the access to a ma inframe to a higher level by considering a number of virtual machines providing different accessible machines at a single physical machines. Idea of cloud computing was first showed by J.C.R Licklider and John McCarthy in 1969. The vision behind this is that everyone goes interconnected and thus able to access data through anywhere. The data are stored in a data center (a centralized infrastructure), which is a vast data storage space. The processing of the request or data performed through servers thus availability and security of the data will be addressed. The service provider and the clients has an agreement for the usage known as SLA (Service level Agreement). Then in 1999, salesforce.com put this idea to an application. Then in 2002, a Cloud based services of web launched by Amazon. It provides on demand services to the subscribed users. There are many proposed definitions of the Cloud computing due to its growing popularity defining its characteristics. Some of the definitions given by many wellknown scientists and organizations are: Rajkumar Buyya defines the Cloud computing in terms of its utility to end user as A Cloud is a type of parallel and distributed system consisting of a collection of interconnected and virtualized computers that are dynamically provisioned and presented as one or more unified computing resources based on service-level agreements established through negotiation between the service provider and consumers [1]. National Institute of Standards and Technology (NIST) defines Cloud computing as follows: Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This Cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models [2]. Cloud computing also defined as A style of computing where IT-enabled capabilities are delivered as a service to end users using internet.

II. PROPOSED TECHNIQUE FOR SCHEDULING WORKLOADS PaaS Layer includes the Heterogeneous Workload
Consolidation technique to calculate the energy consumption of the data center and also gives the information about the SLA violation, as the allocation policies are implemented on PaaS layer which are followed by the IaaS layer.

Design of Solution
The solution to the problem Energy Efficient Scheduling of Workload has designed by the proposed Technique and DFD. Following section presents the design of the solution of the proposed Technique and Data Flow Diagrams.

III.
PROPOSED ALGORITHM Below is the proposed algorithm to calculate the power consumption of the the data center . 

V. TOOLS FOR SETTING CLOUD Environment Cloudsim
CloudSim is an extensible simulation toolkit that enables modeling and simulation of Cloud computing systems and application provisioning environments. The CloudSim toolkit supports both system and behavior modeling of Cloud system components such as data centers, virtual machines and resource provisioning policies. It implements generic application provisioning techniques that can be extended with ease and limited effort. Figure shows the multi-layered design of the CloudSim software framework and its architectural components. The CloudSim simulation layer provides support for modeling and simulation of virtualized Cloud-based data center environments including dedicated management interfaces for VMs, memory, storage, and bandwidth.

NetBeans
NetBeans is an integrated development environment for developing primarily with Java, but also with other languages. The NetBeans IDE is written in Java and can run on Windows, OS X, Linux. The NetBeans Platform allows applications to be developed from a set of modular software components called modules. Applications based on the NetBeans Platform including the NetBeans IDE itself can be extended by third party developers.

VII.
IMPLEMENTATION OF THE PROPOSED TECHNIQUE The technique has been implemented the heterogeneous workload in CloudSim Toolkit by using Netbeans. I have taken a different number of processors, different number of tasks and execution times for each task in each processor as input.

VIII.
RESULTS It can be concluded from the results that the allocation of the virtual machines help to save the energy consumption as the workload will be allocated to the virtual machine having less utilization. So, I can set the threshold utilization of the node according to the variability of the workloads.

IX.
CONCLUSION This gives the introduction of the Cloud computing technique and discusses various workload allocation techniques to efficient manage workloads. In this work a task assignment technique to manage the energy consumption of the data center has been proposed. Technique has been developed in java, deployed on CloudSim toolkit and Experimental results have been gathered.