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Expansion of IT applications creates serious needs for environments with huge storage. In storage systems, capacity and agility are two factors which face limitations. This article evaluates the role of different techniques with regard to the possible methods for accessing to the storage systems. We have prepared three different scenarios using direct, semi-virtual, and virtual attachment models....
Modern data centers use virtual machine based implementation for numerous advantages like resource isolation, hardware utilization, security and easy management. Applications are generally hosted on different virtual machines on a same physical machine. Virtual machine monitor like Xen is a popular tool to manage virtual machines by scheduling them to use resources such as CPU, memory and network...
Virtual systems and virtualization technology are taking the momentum nowadays in data centers and IT infrastructure models.Performance analysis of such systems is very invaluable for enterprises but yet is not a deterministic process. Single-workload benchmark is useful in quantifying the virtualization overhead within a single VM, but not useful in whole virtualized environment with multiple isolated...
One of the novel benefits of virtualization is its ability to emulate many hosts with a single physical machine. This approach is often used to support at-scale testing for large-scale distributed systems. To better understand the precise ways in which virtual machines differ from their physical counterparts, we have started to quantify some of the timing artifacts that appear to be common to two...
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