And not only that! CDNs do not simply store information near the devices they desire. They also help improve online. “It’s like pulling traffic on highways,” says Ramesh Sitaraman, a computer scientist at the University of Massachusetts in Amherst who helped create the first CDN to become a developer in Akamai. “If some of the links in the Internet have failed or broken, CDN algorithms quickly find another way to get to their destination.”
So you can start to see how the CDN goes down, it can take other parts of the internet with them. While this alone does not explain how the impact on Tuesday was met, especially if there is a lot more to be done in this process. Or, there has to be.
Once again, it is unclear what happened in the first case. “We are aware of the job change that has led to disruption among our POPs around the world and we have stopped this change,” a company spokesman said in a statement. “Our global network is back on the internet.”
“Service preparation” may refer to the quantity of items; the only certainty is that whatever it causes, had different consequences. According to Fastly’s report page, all countries except Antarctica have heard this. Despite a quick fix to the cause of the problem, it warned users that they could still see a lower “cache hit ratio” – how often you can find what you’re looking for stored on a nearby server – and “extra volume,” which means getting back to a non-cache source. . In other words, the cabinets are still empty.
This experience is astounding, since CDNs are designed for storm weather. “On the contrary, there is a significant decrease,” says Sitaraman, referring to multiple CDNs. “If the server fails, others may seize the item. If all information sources fail, the item can be moved to another location. If things work well, you may have multiple networks, data problems, and server failures; CDN power supply systems can ensure that users no longer experience embarrassment. ”
When things get messy, Sitaraman says, it is related to a faulty program or configuration that is pushed to multiple servers simultaneously.
Even so, the pages and services that use CDNs often have their own problems instead. Or, he should. Instead, you can see how the various services are in response time this morning, says Medina. It took Amazon about 20 minutes to get back and forth, because it could divert some people to the CDN. Anyone who relies on Fastly, or who does not have a machine to be able to interrupt, has to wait.
“The extinguishing was caused by one culture,” says Roland Dobbins, chief engineer at Netscout Arbor. It is suggested that all online organizations should have several CDN agents to prevent this.
Their choices, however, are limited. As the cloud was heavily modified by Amazon, Google, and Microsoft, providers of three CDNs — Cloudflare, Akamai, and Fastly — control over online traffic. “There is a lot of use among providers,” says Medina. “Every time one of the three has a problem, it’s not something that takes a long time, but it affects the internet.”
This is a major factor, says Medina, as well as why these events have taken place so late, and why they continue to grow. Baseball requires cutoff man; crossroads requires local police. The less dependent they are, the more connected they are, and the risks are greater.
Additional reports by Lily Hay Newman.
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