This article might be of interest. https://blog.cloudflare.com/cloudflare-thwarts-17-2m-rps-ddo….
This blog was posted today by one of Cloudflare’s Product Managers. https://www.linkedin.com/in/omeryoahimik/
“Earlier this summer, Cloudflare’s autonomous edge DDoS protection systems automatically detected and mitigated a 17.2 million request-per-second (rps) DDoS attack, an attack almost three times larger than any previous one that we’re aware of. For perspective on how large this attack was: Cloudflare serves over 25 million HTTP requests per second on average. This refers to the average rate of legitimate traffic in 2021 Q2. So peaking at 17.2 million rps, this attack reached 68% of our Q2 average rps rate of legitimate HTTP traffic.”
“This attack was launched by a powerful botnet, targeting a Cloudflare customer in the financial industry. Within seconds, the botnet bombarded the Cloudflare edge with over 330 million attack requests.”