Schedulers are types of applications responsible for the management of jobs, such as allocating resources needed for any specific job, partitioning of jobs to schedule parallel execution of tasks, data management, event correlation, and service-level management capabilities.
Business On Demand is not just about utility computing as it has a much broader set of ideas about the transformation of business practices, process transformation, and technology implementations. The essential characteristics of on-demand businesses are responsiveness to the dynamics of business, adapting to variable cost structures, focusing on core business competency, and resiliency for […]
The ability to integrate multiple distributed, heterogeneous and independently managed data sources. The ability to provide data catching and/or replication mechanisms to minimize network traffic. The ability to provide necessary data discovery mechanisms, which allow the user to find data based on characteristics of the data.
Cloud computing services are divided into three classes, according to the abstraction level of the capability provided and the service model of providers, namely: (1) Infrastructure as a Service, (2) Platform as a Service, and (3) Software as a Service . Figure 1.3 depicts the layered organization of the cloud stack from physical infrastructure to […]
The increasing complexity of computing systems has motivated research on autonomic computing, which seeks to improve systems by decreasing human involvement in their operation. In other words, systems should manage themselves, with high-level guidance from humans . In this sense, the concepts of autonomic computing inspire software technologies for data center automation, which may perform […]
The idea of virtualizing a computer system’s resources, including processors, memory, and I/O devices, has been well established for decades, aiming at improving sharing and utilization of computer systems. Hardware virtualization allows running multiple operating systems and software stacks on a single physical platform. As depicted in Figure 1.2, a software layer, the virtual machine […]
In utility computing environments, users assign a “utility” value to their jobs, where utility is a fixed or time-varying valuation that captures various QoS constraints (deadline, importance, satisfaction). The valuation is the amount they are willing to pay a service provider to satisfy their demands. The service providers then attempt to maximize their own utility, […]
Grid computing enables aggregation of distributed resources and transparently access to them. Most production grids such as TeraGrid and EGEE seek to share compute and storage resources distributed across different administrative domains, with their main focus being speeding up a broad range of scientific applications, such as climate modeling, drug design, and protein analysis. [wp_ad_camp_1] […]
ALGORITHM Purpose : To find roots of a given quadratic equation. Input: Coefficients of quadratic equation a, b, c Output: Root1 and Root2 START STEP 1: [Input the values of a, b, c] read a, b, c STEP 2: [Calculate the determinant] determinant = b*b-4*a*c STEP 3: [Check for validity] If a is equal to […]
ALGORITHM: PURPOSE : To simulate a calculator using arithmetic expressions INPUT: Enter num1 and num2 OUTPUT: Print the result of addition or subtraction or multiplication or division or modulus. START Step 1: [Enter first number] read num1 Step 2: [Enter Second number] read num2 Step 3:[Enter Choice] read choice Step 4:[To perform addition] if choice […]
