While Cisco has been predicting for years the growth of the network by way of their Visual Networking Index, the Cloud Index takes a look at traffic both inside and outside of the data center. Among the key forecasts from the new Cloud report is that overall data center IP traffic will grow between 2010 and 2015 at a compound annual growth rate of 33 percent. Overall traffic will grow from 1.1 Zettabytes in 2010 to 4.8 Zettabytes in 2015.
“The interesting part about the 4.8 Zettabyte figure is that it is higher than what we forecast in the Visual Networking Index for the network itself and this caught us by surprise,” Doug Webster, Sr. Director of SP Marketing at Cisco told InternetNews.com. “The vast majority of traffic is staying within the data center itself.”
Webster noted that approximately 76 percent of traffic stays within the data center as virtual machines migrate from one server to another. Data center to data center traffic is also on the rise, accounting for as much as 17 percent of total traffic.
Cisco analyst Shruti Jain added that many people don’t realize how much supplementary data is generated for different types of transactions. For example, Jain told InternetNews.com that if you send a 1 MB email to four people, you’d expect to have used 5 MB of data. As it turns out according to Cisco’s findings, that transaction can generate as much as 30 MB of data due to all the storage, replication and backup that goes on.