The largest DDoS attack was recorded Wednesday and targeted GitHub. The attack measured 1.3 Tbps of sustained traffic for eight minutes. It shattered a previous DDoS publicly record attack associated with the Mirai botnet in Sept., 2016 that maxed-out at half the intensity (620 Gbps) Wednesday s attack is attributed to a form of DDoS attacks called a memcached amplification technique. The day before the attack, Akamai, Arbor Networks and Cloudflare each said they had observed an uptick in attacks using the memchached technique.
Source: https://threatpost.com/in-wake-of-biggest-ever-ddos-attack-experts-say-brace-for-more/130205/