Yes, HN effect lol-sob.
Mitigation: reducing servers life time temporarily so more people can try.
Mitigation: reducing servers life time temporarily so more people can try.
I'd start by moving the test VMs to bare-metal servers running libvirt. You can get a 128GB RAM server for ~110 EUR and that should be able to run around 120 concurrent VMs assuming 1GB of RAM to each (CPU isn't a major issue in this case).