We see more and more people coming to us (ESP) for application mail delivery. I kidd you not.
I do not see any other orgs, e.g. Tier1 providers or internet exchanges, providing any relevant and coherent data (maybe I am missing some interesting stuff). Maybe these guys have a stroke of luck/DDoSses (which they can market as well). It does not make the data invalid (hard to validate; yes). They have a reputation to keep up (must be pretty clean).
Now that I think of it: Tier1 family is awfull quiet about DDoS. Good for their business.
If someone is 50% wrong all the time I call him incompetent and fire his ass.
True. Issue is that what was once handily placed on one server, speaking year 2000 here, now needs to be torn apart. Things have history: Early developers are not always good at admin work. Too easy to get it wrong.
iotop. A VM only makes this problem harder.
We use iotop of course. It was an example of one of many resources: file descriptors, connections, memory, io, bandwidth,
chroot with linux-vserver enforcement.
We use OpenVZ, at the moment.