Strengthening of the ‘weak link’ in the virtualization storage area networks (SANs) and virtualization (such as Microsoft Hyper-V, VMware ESX) are the fast-growing presence and the dominant future of universal computing. After all, cloud computing is based”on these technologies. Key to these new technologies is the sharing of computer resources that are by definition limited. Speed is important not only in the economy–she is the A and O by the abstracting of applications, operating systems, and data storage can scale IT departments and service providers, provide, centralize, apply, and much faster and significantly more cost-effectively adapt to business needs. Although IT can serve far better the economy by using these technologies, these technologies with age-old problems of IT are flawed. You solve many problems, but many others increase.
The data security problem disappears not easy; one could even say that it always more serious is that, largely due to the common use of computer resources. Computing resources are not infinite. Managers, who are facing the challenge to build computing infrastructures and to maintain, need to maximize the use of existing resources. The four primary resources correspond to the physical in the modern IT landscape: CPU, memory, network, and hard drive (storage). Disk I/O performance (www.diskeeper.com/ business/v-locity /? apid = PPS0006651) has always been the slowest of the primary components and the weakest link remains despite the introduction of SANs, solid state drives (SSD) and tiered storage systems. “The improvement of disk I/O performance in modern virtualized infrastructures usually the greatest performance increase represents, exactly as it did in the past with physical” servers and direct-attached storage the case was. Less is more data fragmentation, which occurs in all general purpose operating systems natively, causes that more disk I/o’s are generated, as are necessary. Fragmentation refers to the condition in which data blocks and free space on a disk are not contiguous, but instead broken up and spread over the disk.