Cloud Computing has been widely adopted as a new paradigm for providing resources because of the advantages it brings to both users and providers. Even if it was firstly targeted at enterprises wishing to reduce their equipment management costs, it has been rapidly recognized as both an enabler for new applications and as a mean to allow enterprises of all… (More)
The deployment, management and total cost of ownership of large computing environments always involve huge investments. These systems, once in production, have to meet the needs of users belonging to large and heterogeneous communities: only an efficient and effective use of these systems can repay the investment made. The heterogeneity of user communities… (More)
This work is related with planning and implementation of an on demand computing service which is able to obtain a right trade-off among managment cost reduction, environmental sustainability and user satisfaction.
Even though the Italian Grid Infrastructure (IGI) is a general purpose distributed platform, in the past it has been used mainly for serial computations. Parallel applications have been typically executed on supercomputer facilities or, in case of ``not high-end'' HPC applications, on local commodity parallel clusters. Nowadays, with the availability of… (More)
The minimisation of the total cost of ownership is hard to be faced by the owners of large scale computing systems, without affecting negatively the quality of service for the users. Modern datacenters, often included in distributed environments, appear to be “elastic”, i.e., they are able to shrink or enlarge the number of local physical or virtual… (More)
Large data centers have costs of implementation and management generally very high and a significant part of these costs are related to energy consumption. In addition, Governments, in the implementation of the Kyoto Protocol, push to adopt in the coming years more responsible behavior towards the environment implementing energy-saving strategies also in… (More)
The management of distributed e-infrastructures introduces additional requirements in the monitoring system. The main issue is to enable users to achieve the awareness of the global status, and to present the information in function of the role: simple user, system admin, manager. In this work we present the solution created for the ReCaS infrastructure… (More)