Facebook Engineering Explains "Worst Outage We’ve Had in Over Four Years"
Facebook was down for two and a half hours earlier today for many of its 500-some million users around the world, in what the company describes as “the worst outage we’ve had in over four years.” As part of the downtime, social plugins such as the Like button, and the developer platform, were also not accessible. The site also went down yesterday, but apparently for less time and fewer people.
As the engineering team details in a post this afternoon following the outage, a cache configuration problem cascaded into a major system failure, and ended up with Facebook having to turn off the site for many if not all users.
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