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    Xen and KVM - Who is using what and why?

    IT Discussion
    xen xenserver kvm virtualization hypervisor scale
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    • FATeknollogeeF
      FATeknollogee @JaredBusch
      last edited by

      @JaredBusch said in Xen and KVM - Who is using what and why?:

      There is a bit of fanboy cult thing to some of the the XS love around here.

      Time to start the Hyper-V cult?

      JaredBuschJ 1 Reply Last reply Reply Quote 0
      • JaredBuschJ
        JaredBusch @FATeknollogee
        last edited by JaredBusch

        @FATeknollogee said in Xen and KVM - Who is using what and why?:

        @JaredBusch said in Xen and KVM - Who is using what and why?:

        There is a bit of fanboy cult thing to some of the the XS love around here.

        Time to start the Hyper-V cult?

        Absolutely not. Any cult is bad, Christian, Muslim, Jewish, Wicca, Cthulu, wtf ever. This is business not religion.

        FATeknollogeeF 1 Reply Last reply Reply Quote 1
        • FATeknollogeeF
          FATeknollogee @JaredBusch
          last edited by FATeknollogee

          @JaredBusch said in Xen and KVM - Who is using what and why?:

          Absolutely not. Any cult is bad, Christian, Muslim, Jewish, Wicca, Cthulu, wtf ever. This is business not religion.

          These days I simply assume religion is a biz, it helps me wade through all the BS quicker 😄

          btw, I do not subscribe to the anti MSFT theme that seems to be quite prevalent on this site

          scottalanmillerS 1 Reply Last reply Reply Quote 0
          • scottalanmillerS
            scottalanmiller @FATeknollogee
            last edited by

            @FATeknollogee said in Xen and KVM - Who is using what and why?:

            btw, I do not subscribe to the anti MSFT theme that seems to be quite prevalent on this site

            Nor do I. And I don't think that there is as much as you think. But it certainly exists. I recommend Windows all the time, when it is appropriate. I'm way more of a Microsoft supporter than anyone that still runs Windows 7, IMHO.

            1 Reply Last reply Reply Quote 1
            • FATeknollogeeF
              FATeknollogee @stacksofplates
              last edited by

              @stacksofplates said in Xen and KVM - Who is using what and why?:

              I use KVM. It's built into Red Hat, and really easy to use.

              What makes it really easy to use & vs what other platforms?

              stacksofplatesS 1 Reply Last reply Reply Quote 0
              • FATeknollogeeF
                FATeknollogee @stacksofplates
                last edited by

                @stacksofplates said in Xen and KVM - Who is using what and why?:

                @scottalanmiller said in Xen and KVM - Who is using what and why?:

                KVM lacked tools like XenServer and XenOrchestra, backup vendor support and so forth

                It hasn't. Virt-Manager has been around for a long time. XenServer doesn't have any backup vendor support. The only support is agent based, which is exactly what KVM has. You also have backup options through QEMU and libvirt.

                Does XOA not count as backup vendor support?

                Is anyone developing a host based backup for KVM?

                What's the difference between Virt-Manager & oVirt?

                stacksofplatesS 1 Reply Last reply Reply Quote 0
                • stacksofplatesS
                  stacksofplates @FATeknollogee
                  last edited by

                  @FATeknollogee said in Xen and KVM - Who is using what and why?:

                  @stacksofplates said in Xen and KVM - Who is using what and why?:

                  I use KVM. It's built into Red Hat, and really easy to use.

                  What makes it really easy to use & vs what other platforms?

                  It's really straight forward both in administration and in setup. I'd say with Virt-Manager/virsh it's easier to use than XenServer and XenCenter (without XenOrchestra, just the Citrix pieces).

                  1 Reply Last reply Reply Quote 0
                  • stacksofplatesS
                    stacksofplates @FATeknollogee
                    last edited by

                    @FATeknollogee said in Xen and KVM - Who is using what and why?:

                    @stacksofplates said in Xen and KVM - Who is using what and why?:

                    @scottalanmiller said in Xen and KVM - Who is using what and why?:

                    KVM lacked tools like XenServer and XenOrchestra, backup vendor support and so forth

                    It hasn't. Virt-Manager has been around for a long time. XenServer doesn't have any backup vendor support. The only support is agent based, which is exactly what KVM has. You also have backup options through QEMU and libvirt.

                    Does XOA not count as backup vendor support?

                    Is anyone developing a host based backup for KVM?

                    What's the difference between Virt-Manager & oVirt?

                    XOA could count. No specific backup only vendors. KVM has Acronis.

                    I'm not using host-based backup anyway for KVM. I'm using all agent based, because I can spin up templates faster than a restore from a backup and I can manage the install/setup with Ansible.

                    oVirt is a whole platform vs Virt-Manager being just a management interface.

                    1 Reply Last reply Reply Quote 1
                    • S
                      StorageNinja Vendor @Dashrender
                      last edited by

                      @Dashrender This is really the case with most cloud platform overlays also.

                      If I'm "using" Pivitol Cloud Foundry then the back end (Azure/AWS/SoftLayer) matters less for the day to day.

                      I've seen customers use CMP's that could provision to In house, AWS, Softlayer and it actually showed the cost models for each on a given deployment (so they could cross compare).

                      On one hand the hypervisor (for day to day) matters less if it's abstracted but it still does matter. In other ways it matters more (if the platform associated with it, offers network virualization, features that lower cost or speed actions like forked VM). The support model matters a hell of al to more than people give it credit (Why people like HCI appliances, the all in support model).

                      1 Reply Last reply Reply Quote 0
                      • S
                        StorageNinja Vendor @FATeknollogee
                        last edited by StorageNinja

                        @FATeknollogee said in Xen and KVM - Who is using what and why?:

                        Saying one moved to Scale because it's KVM is like saying I moved to Nutanix because it's KVM!

                        Let me re-phrase the question: Was the move to Scale done because it was technically superior to XS or was it financially motivated?

                        The challenge for both Scale and Nutanix is that KVM REALLY isn't the reason as they don't expose the native KVM API's and so products that would layer on top of KVM (Cloud Forms, vRealize Automation etc) are effectively broken unless re-written for their own proprietary API's. (In Scale's case with target customers and market this doesn't really matter in Nutanix's case this leads customers with heavy interop with other things like CMP, to end up running vSphere for the most part).

                        In this regard a reason someone might choose KVM (Open Platform) or Xen (Public robust API's) actually is the LAST reason you would choose Scale/Nutanix as they are more difficult to interact with from 3rd party tools than a AS400 🙂

                        1 Reply Last reply Reply Quote 0
                        • Emad RE
                          Emad R
                          last edited by Emad R

                          KVM with Virtmanager.
                          Centos latest is my preferred KVM host.
                          And Fedora LXDE Spin is my preferred Virt-Manager choice, I use it from inside Windows using Virtualbox.

                          Cause it resembles the old ESXi Philosophy with Vsphere C# client
                          And you can do whatever you want with it, and for free. Especially when you use virt IO drivers for network and disk, you get nearly identical bare metal speeds.

                          But sadly its lacking other tools to allow users to connect and use the VM, you will have to do this from inside the VM like RDP and VNC.

                          1 Reply Last reply Reply Quote 0
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