[tor-relays] DDoS attack on relay

My hosting provider alerted me of a DDoS attack on one of my relays. It started around 2016-01-26 12:42 UTC. They claim they tried "filtering, routing, and network configuration changes" to mitigate the attack, but as a last resort they temporarily disconnected the host from the network for 3 hours.

I know such attacks are not uncommon, but I'm curious if any other operators experienced a DDoS around the same time?

I'm also curious to know more about the nature of such attacks -- what type of attack was it, what is the general end goal of attacking a random Tor (non-exit) relay, etc. My hosting provider is unable or unwilling to share additional information.