The Impact Of Server Virtualization
The impact of server virtualization on storage is often masked, Toigo said. For instance, IDC last year estimated that there were 11 exabytes of storage worldwide, and that it would grow 30 percent to 40 percent annually to reach 46 exabytes by 2014.
However, IDC this year revised the estimation, saying growth would be about 300 percent in companies with heavily virtualized environments, bringing the total to 168 exabytes in 2014. That was followed by Gartner, which estimated that storage in virtualized environments would lead to a 650 percent growth in storage to 202 exabytes by 2014. Toigo said the storage industry has adopted a "Disk Everywhere" dogma, with businesses adopting disk-to-disk backups and a penchant for storing more and more data as files rather than as blocks, both of which unnecessarily increase the amount of data stored on hard disks.