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iOS 9 download problems not due to overloaded delivery networks

Gregg Keizer | Sept. 21, 2015
Content delivery expert says plenty of capacity to handle iOS upgrade.

"In conversations I've had with some ISPs in the U.S., iOS 9 downloads have been accounting for anywhere between 8% and 15% of traffic inside their networks," Rayburn wrote on his blog today.

That range was within the usual for an iOS launch, although slightly more on the high end than in the past, Rayburn elaborated today in an interview.

One advantage Apple has over others in delivering large quantities of data to customers is that it regularly faces spikes like the iOS 9 roll-out, and thus has statistics it can review to forecast demand. "Apple knows their traffic patterns very well," said Rayburn, including peak demand times, the geographic distribution of its iOS device owners, and which ISPs are most used.

"There have been no capacity issues with iOS 9," said Rayburn. "I haven't heard a single problem [from ISPs and CDNs] about capacity."

As of noon PT, iOS 9's share of all iOS editions had reached 22.3%, virtually the same as iOS 8 at its 50-hour mark, according to data from analytics vendor Mixpanel. iOS 9 has almost doubled its share in the past 24 hours.


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