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Many existing grid authorization systems adopt an inefficient structure of storing security policies for the available resources. That leads to huge repetitions in checking security rules. One of the efficient mechanisms that handle these repetitions is the Hierarchical Clustering Mechanism (HCM) [1]. HCM reduces the redundancy in checking security rules compared to the Brute Force Approach as well...
Many existing grid authorization systems adopt an inefficient structure of storing security policies for the available resources. That leads to huge repetitions in checking security rules. One of the efficient mechanisms that handles these repetitions is the Hierarchical Clustering Mechanism (HCM). HCM reduces the redundancy in checking security rules compared to the Brute Force Approach as well as...
Grid-computing technology is used to solve large or complex computational problems on distributed computational resources belonging to multiple organizations regardless of their geographical locations. In this paper, we introduce an integration of the SAFORAH geospatial data grid, provided by the Canadian Forest Service, and the computational grids, offered by the University of Victoria and National...
Heterogeneity of resources can not be ignored while scheduling application task graphs in grid environment. In this paper, a list-based task scheduling algorithm, called scheduling with heterogeneity using critical path (SHCP) for grid computing system is presented. Some other scheduling algorithms such as HEFT use mean execution time based b-level for deciding task priority and ignore the importance...
High availability systems ensure nonstop service delivery despite natural calamities or any other disruptions, whatsoever. In a grid, high availability can be achieved by offering services of a failed node from any other live node, if redundant storage of data and software of the failed node is made available on that live node. During replication of data in a grid for high availability, the techniques...
The heterogeneous and very dynamic nature of a grid environment demands a very scalable authorization system. This brings out the need for a fast fine-grained access control (FGAC) mechanism for grid resources to accomplish the required scalability. This paper is proposing a new method of storing and manipulating the resource's security policy in a way that enables authorization systems to avoid redundancy...
The present paper discusses the design and application of GridX1, a computational grid project which uses shared resources at several Canadian research institutions. The infrastructure of GridX1 is built using off-the-shelf Globus Toolkit 2 middleware, a MyProxy credential server, and a resource broker based on Condor-G to manage the distributed computing environment. The broker-based job scheduling...
GridXl is a computational grid designed and built to link resources at a number of research institutions across Canada. Building upon the experience of designing, deploying and operating the first generation of GridXl, we have designed a second-generation, Web-services-based, computational grid. The second generation of GridXl leverages the Web services resource framework, implemented by the Globus...
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