Latest Netflix Disruption Highlights Challenges of Cloud Computing

The following is an excerpt from an article in:


The New York Times
Thursday, December 27, 2012

Latest Netflix Disruption Highlights Challenges of Cloud Computing

By BRIAN X. CHEN

For some on Christmas Eve, “White Christmas” was a blackout on Netflix.

That’s because problems with Amazon’s cloud computing service, which provides storage and computing power for all kinds of Web sites and services, caused Netflix to go down for much of the day.

In updates on a Web site that reports on the status of its online services, Amazon traced the trouble to Elastic Load Balancing, a part of its service that helps spread heavy traffic among multiple servers to prevent overload. The company gave few details about the problems in its data center in Northern Virginia beyond this and did not offer an official statement or explanation.

Social networks filled with complaints. Some customers also complained that Amazon’s own streaming service, Amazon Prime, was down. Amazon said it had fixed the problem completely by the afternoon of Christmas Day, and Netflix said it had restored its services to most of the affected consumers by late Christmas Eve. But the episode highlighted how consumers are increasingly using “the cloud.”

As more everyday devices, appliances and even automobiles rely on services connected to the Internet, consumers expect those services to be available at all times. Yet all sorts of disruptions — harsh weather conditions or an apparent overload — can knock a service out for hours.

Last month, problems with the same Amazon data center in Virginia took down Reddit, Foursquare and Heroku. The instance was explained on the status Web site as “degraded performance” in some parts of Amazon’s storage service. In June, a lightning storm hit the Virginia data center, taking Netflix as well as Pinterest, Instagram and other sites off line for hours. That time, too, customers were offered little insight into what had happened.

In April 2011, an Amazon failure took down many smaller sites that had rented cloud storage space from the Internet giant. That time, the companies that were most affected were start-ups that were less likely to pay for so-called redundancies, or backup systems that kick in when a service fails. Netflix was not affected then, and said at the time it was because it had taken advantage of the redundancies that Amazon offers.

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