One argument for edge computing is that it reduces the amount of raw data (much of it not valuable) that potentially has to be transmitted across the wide area network for processing.
Cisco estimates that nearly 850 ZB will be generated by all people, machines, and things by 2021, up from 220 ZB generated in 2016.
“Most of the more than 850 ZB that will be generated by 2021 will be ephemeral in nature and will be neither saved nor stored,” Cisco notes. But perhaps 10 percent is useful, which means that there will be 10 times more useful data being created (85 ZB, 10 percent of the 850 total) than will be stored or used (7.2 ZB) in 2021.
Useful data also exceeds data center traffic (21 ZB per year) by a factor of four. So edge computing might help bridge the gap.
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