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Microsoft- Thank you, Brent. Yes, I've seen that and I do not see any advantages of Gen2 over Gen1 for my use cases: I don't care about Secure Boot here, I don't need to boot over network, I don't need huge VHDX.
- Artem Pronichkin
if you do not care about any of the benefits of Generation 2 VMs, you can of course keep using your Generation 1 VMs for the time being.
but if you do care about hotpatching (as it's evident from some of your other questions) you might start care about some of the benefits of Generation 2 VMs. Hotpatching requires VSM (Virtual secure mode, also known as virtualization-based security or VBS), so it won't be available for Generation 1 VMs.
finally, Generation 2 VMs carry less baggage in the form of legacy emulated devices. So, the performance overhead of Generation 2 VMs is a slightly less than of Generation 1 VMs. So, Generation 2 is a good default option for most customers, even if you do not currently care about any of the specific features.
- Well, yeah, you are right - I do want hotpatching. And if that will be available for Gen2 VMs only, then yes, of course this will be a reason for us to move to Gen2. Regarding performance: The article Brent linked above talks about performance improvements in some virtual devices, but we do not use them. I see no mentions of performance improvements in SCSI controller over the IDE one. That article also doesn't say that a synthetic network adapter works faster/consumes less resources than a legacy one - only regarding network boot.
