With the PXE boot issue... amazon has millions of servers and they roll changes out to hardware on a 5 year cycle or versions/skus of the compute. So anything h

With the PXE boot issue... amazon has millions of servers and they roll changes out to hardware on a 5 year cycle or versions/skus of the compute. So anything hardware wise will be detectable when your software doesn't work on the new instance type/sku/class. I've had this happen, multiple times over 10 years, and always just canary out new instance types, in fact I setup our systems to make this simple. But you can easily try it out and hand the hardware back if it doesn't work. We reported the issues every time. I believe AWS scrapped one sku due to an issue we reported. They also pulled back skus from us because another customer realized they were broken in a away that would impact everyone eventually. When it comes to software amazon again has millions of machines, regions, availability zones. AWS is very very slow and deliberate about how they roll out software. They do things by Sub AZ (shard, cell), AZ, Region... they can and do split on other axes as well. Rolling out a PXE boot change would be caught by increase in failed boot or under utilized instances (they didn't boot right) pretty quickly in a roll out and rolled back. All of this is aided by many may of AWS's customers treating servers like cows not pets, so whacking and restarting a small % of hosts isn't super detrimental and likely won't even be noticed. AWS can be extra cruel to internal teams actually. We have have a few concepts internally that push users to be even more ephemeral than normal. As for how do people learn PXE boot? Experience or on the job training. I have no idea if AWS uses PXE boot anymore, I suspect they have a specialized setup, boot vms directly, etc. There's hardware security with the hypervisors you don't get on normal machines. I PXE booted a linux desktop the other day in the office to install linux so the corp side does use it. I'm not really sure what the point you are getting at is tho. The cloud providers are doing things on a scale most people are not used to thinking of and the problems are often quite different as are the solutions. Are you rolling your own custom hardware with FoxCon (https://www.importgenius.com/suppliers/foxconn-aws https://www.importgenius.com/suppliers/foxconn-aws)? Do you roll your own custom silicon (https://www.amazon.jobs/en/landing_pages/annapurna%20labs https://www.amazon.jobs/en/landing_pages/annapurna%20labs)? Would you be solving PXE boot issues if you had these capabilities?