What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options
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Another 2008 era resource (I'm using Google's time limiting to make sure I'm only getting content that hasn't been written later about it...)
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@scottalanmiller said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
LIke I said, you need to provide your documentation that goes against everything in the industry. You made the claim.
Here you go again with "everything in the industry". Show me this "everything"
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@dyasny said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
@scottalanmiller said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
LIke I said, you need to provide your documentation that goes against everything in the industry. You made the claim.
Here you go again with "everything in the industry". Show me this "everything"
What do you think that I've been doing?
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@scottalanmiller said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
What do you think that I've been doing?
Sorry, don't have as much time for online debates as you do, I'm looking at what you posted right now, thanks for taking the time
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@dyasny said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
@scottalanmiller said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
What do you think that I've been doing?
Sorry, don't have as much time for online debates as you do, I'm looking at what you posted right now, thanks for taking the time
I think of it as critical industry education.
But I would say that making wild counter-industry claims of a conspiracy to cover up systems architectures, going against a decade of discussion on this very topic, is something that should be held back if you don't have the time to really delve into it. Knowing that you are trying to completely redefine OS, kernel, hypervisor, hypervisor types, Hyper-V history... all of those things are fine, but it is a bit of a crusade that takes a lot of time.
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https://www.itprotoday.com/virtualization/windows-server-2008-hyper-v-security
Hyper-V Architectural Defenses
When Hyper-V loads, it creates a thin abstraction layer (less than 1MB) called the hypervisor. It operates between the physical server hardware and the host OS. The hypervisor interfaces directly with the server hardware and loads before the host OS starts. You could also define the hypervisor as a mini OS that allows for the virtualization of other OSs on top of it. All OSs that run on a Hyper-V server (both the virtualized ones and the host OS) always run inside a virtual machine (VM) that's under the watchful eye of the hypervisor. Virtual Server uses a different approach in which the host OS runs beside the virtualization layer, and the host OS also directly interfaces with the hardware.
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Hyper-V Architecture
Hyper-V is a so called hypervisor. The hypervisor is installed between the hardware and the operating system. Hyper-V is a role in Windows Server 2008 and can only be installed after Windows Server 2008 is installed. When installing the Hyper-V role the hypervisor is “slid” between the hardware and the operating system. Besides the hypervisor a little more is installed as well. The VMBus is installed which is running in kernel mode as well as a Virtual Storage Provider (VSP). Furthermore a WMI provider is installed which is running in User Mode. A VMWorker process is spawn for every Virtual Machine that’s started when Hyper-V is running.
After installing the Hyper-V role in Windows Server 2008 the server needs to be rebooted and the server is operational. The original Windows Server 2008 that was installed is turned into a Virtual Machine as well, this one is called the “root” or the “parent partition”. It is a very special Virtual Machine since it controls the other Virtual Machines running on the server. I’ll get back to this later in this article.
Virtual Machines and the parent partition on Hyper-V are running side-by-side as shown in
https://www.red-gate.com/simple-talk/wp-content/uploads/imported/730-HyperV6.jpg
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Adding to confusion... Hyper-V was sometimes called "Windows hypervisor" and Type 1 was often called "hypervisor virtualization" in the 2008 era. But just marketing terms being thrown around.
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Hyper-V team themselves talking about architecture in 2008.
"Hypervisor is very thin and runs on the hardware itself."
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@scottalanmiller said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
But I would say that making wild counter-industry claims of a conspiracy to cover up systems architectures, going against a decade of discussion on this very topic, is something that should be held back if you don't have the time to really delve into it. Knowing that you are trying to completely redefine OS, kernel, hypervisor, hypervisor types, Hyper-V history... all of those things are fine, but it is a bit of a crusade that takes a lot of time.
I specifically remember this being a huge problem for MS, because they couldn't pretty much go the KVM route on server 2008, and them fixing the issue by changing direction and replicating Xen's architecture (and actually hiring Xen engineers to do that).
I also remember some private demos MS gave us for hyper-v on pre-release versions of 2008 and experimental 2003 builds that were, frankly, horrible. But all that was in 2007, so I might be confusing the dates here a bit.
As for crusades, I don't really care enough to make a real issue out of it, I'm just annoyed by marketing people peddling "baremetal", double kernel design as better because "baremetal". to illustrate my point, I'll just leave this here:
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I found a 2008 source that disagrees with everyone else, but doesn't agree with you either. Just random and, in reality, their diagram is impossible and just shows that they don't understand how it works as their diagram isn't plausible. This is Dell's explanation from the time.
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@dyasny said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
I specifically remember this being a huge problem for MS, because they couldn't pretty much go the KVM route on server 2008, and them fixing the issue by changing direction and replicating Xen's architecture (and actually hiring Xen engineers to do that).
I also remember some private demos MS gave us for hyper-v on pre-release versions of 2008 and experimental 2003 builds that were, frankly, horrible. But all that was in 2007, so I might be confusing the dates here a bit.
Before releasing, they likely tried a lot of stuff. They were doing Type 2 before Hyper-V and it was awful. And I'm sure they tried lots of stuff before the 2008 release. But the first release of Hyper-V to the public and the first with that name, was definitely the "Xen way." It was considered a Xen clone since it was Veridian.
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@dyasny said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
As for crusades, I don't really care enough to make a real issue out of it, I'm just annoyed by marketing people peddling "baremetal", double kernel design as better because "baremetal". to illustrate my point, I'll just leave this here:
That's fine, and I see what you are trying to say now. You are trying to make the unofficial "Type 0" argument. Basically KVM and ESXi claim to have a superior Type 1 architecture to a point that they sometimes get called "Type 0" to differentiate themselves from other Type 1s.
But given the definition of Type 1, they are both Type 1, just two different approaches. And I don't think that anyone is thinking that the "Xen Way" is better, only that the differences aren't related to Type 1 vs Type 2. Just that some products are better than others, even within the same category.
I think you are trying to find a way for it to be the Type 1 or bare metal nature that is the cause, but it's not.
And a Type 2 architecture is far more different still. What defines T1 v T2 is all in the first interface layer. All of the "good bits" of KVM are in a layer that is "above" the interface point that defines which type is which.
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@scottalanmiller now that IS funny - Dell was where I worked at the time, and all the demos MS tried to give us for weeks failed one after the other. Compared to a perfectly stable vsphere 2 lab we had on the floor then, it was especially fun.
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@dyasny said in What would your recommendation be for a Type 1 Hypervisor - including backup and restoration options:
@scottalanmiller now that IS funny - Dell was where I worked at the time, and all the demos MS tried to give us for weeks failed one after the other. Compared to a perfectly stable vsphere 2 lab we had on the floor then, it was especially fun.
I had stability issues with ESX even as late as 4 in production.
Also funnily... same era (pre-Hyper-V) I had to train the ESX engineers from VMware as to how their architecture worked. Because they were copying Xen at the time, too, but weren't being too public about it and even their trainers didn't know how it worked. It was obvious when using it that it was Type 1 with RHEL 2.1 in the Dom0, and common sense suggested that that is how they would have done it at the time, but their own engineers had no idea. But VMware themselves didn't hide it, we were able to pull out their white papers and prove it to engineering.
That was the start of my distrust of the VMware cult, though. The lack of knowledge from VMware made me very worried about their ability to support something if they didn't even know the basics that someone who'd never used it could see in ten minutes.
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@dyasny are you actually Curtis with a new display name?
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ESXi is even simpler still than KVM. It's hypervisor kernel is all inclusive and there is no bloat. KVM, in theory, can get to this but requires a ton of work that no one wants to do because the KVM approach is good enough.
https://static.thegeekstuff.com/wp-content/uploads/2010/05/vmware-esxi.png
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just...wow
