• September 30

Details of Facebook’s Self-inflicted DDoS Attack

It seems as if someone deployed into production that incorrectly cleared values from their caching layer (they use Memcached, 28TB worth of memory across 800 servers). That caused all their app servers to query the DB for the uncached value. This seems to be what ultimately brought the site down.

Facebook – More Details on Today’s Outage.

Further tech reading and analysis:

High Scalability – Facebook and Site Failures Caused by Complex, Weakly Interacting, Layered Systems.




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About Author

Larry

A certified PHP developer and architect living and working in Orange County California. Larry specializes in LAMP based platforms and focuses on a wide variety of leading edge web technologies including web service development, AJAX enabled applications as well as Flash based application development.