Why Facebook is Down.

They will fix it soon. By the time you read this, they will have it under control. I guess. By why or how could such a big thing go down?

Well, the y say the bigger the harder they fall. Such a popular website gets millions of requests every day. This puts a heavy load on the equipment, any glitch, however small, creates a bottleneck. But there is more to it that just that.

Here is an update:

Update: It’s back after approximately 15 minutes of outage. Even though a 15-minute outage seems minor, it becomes a very important issue when it affects big services, such as Facebook and Google.

When seeing how people react to those outages on Twitter, they forget instantly that the service was down and get back to what they used to do. Outages don’t hurt a company’s reputation if it happens every now and then — unlike during Twitter’s early days.

The is is DNS. The DNS protocol was created years ago and now is showing its weakness. For a longs time the internet used a 32 bit address know at IP version 4. It was replaced by the new IP version 6, but the deployment was not without issues.  Here is a quote from Facebook:

Earlier today we made a change to our DNS infrastructure and that change resulted in some people being temporarily unable to reach the site. We detected and resolved the issue quickly, and we are now back to 100 percent. We apologize for any inconvenience.

So we can expect some outages to happen again with even the big internet companies.  The internet is still growing and will keep having glitches. Still, the Internet the most amazing form  of human communication up to now.

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