The last few days we have an attack with large amount of requests, more than 7k per second from 1579 different IP addresses. This resulted in 80% server load, but no one noticed, everything works as before.
February 21, we were dealing with a large attack, gain experience, and were now ready for this, so now no one even noticed.
Who did the attack is not clear, but it is clear only that the attack was made from Poland. Below is a link to a list of IP addresses of attacking side.