From: arne@vajhoej.dk   
      
   On 12/3/2024 7:41 PM, Dan Cross wrote:   
   > In article ,   
   > Arne Vajhøj   wrote:   
   >> On 12/3/2024 3:24 PM, Lawrence D'Oliveiro wrote:   
   >>> On Tue, 3 Dec 2024 09:40:40 -0500, Arne Vajhøj wrote:   
   >>>> If you look at what is available and what it is used for then you will   
   >>>> see that what is labeled type 1 is used for production and what is   
   >>>> labeled type 2 is used for development. It matters.   
   >>>   
   >>> What people discovered was, they needed to run full-fat system management   
   >>> suites, reporting tools, backup/maintenance tools etc on the hypervisor.   
   >>> In other words, all the regular filesystem-management functions you need   
   >>> on any server machine. So having it be a cut-down kernel (“type 1”)   
   didn’t   
   >>> cut it any more -- virtualization is nowadays done on full-function Linux   
   >>> kernels (all “type 2”).   
   >>   
   >> Having a full host OS is very nice for a development system with a few   
   >> VM's to build and test various stuff.   
   >>   
   >> It does not scale to a large production environment. For that you need   
   >> central management servers.   
   >   
   > There are some very senior engineers at Google and Amazon who   
   > run the largest VM-based production environments on the planet   
   > and they disagree.  There, VMs run under a "full host OS."   
      
   You totally missed the point.   
      
   With KVM they do have a full host OS.   
      
   But they don't need it to "run full-fat system management   
   suites, reporting tools, backup/maintenance tools etc on   
   the hypervisor", because they don't manage all those VM's   
   that way. That would be impossible.   
      
   Arne   
      
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