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    Virtualization and HA, Scalability

    IT Discussion
    virtualization scalability high availability
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    • DustinB3403D
      DustinB3403
      last edited by DustinB3403

      @scottalanmiller video here can help explain the difference between IT Buyers and IT Pros, but simply put Buyers don't need to know how everything is set to work together, that is the IT Pros job.

      Youtube Video

      1 Reply Last reply Reply Quote 1
      • K
        kelsey @Obsolesce
        last edited by

        @tim_g hi is there a website about scalable for information

        scottalanmillerS ObsolesceO Reid CooperR 3 Replies Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller @kelsey
          last edited by

          @kelsey said in Virtualization and HA, Scalability:

          @tim_g hi is there a website about scalable for information

          In a general sense, or related to a specific product or architecture?

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          • ObsolesceO
            Obsolesce @kelsey
            last edited by

            @kelsey said in Virtualization and HA, Scalability:

            @tim_g hi is there a website about scalable for information

            I'm not sure what you're asking.

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            • Reid CooperR
              Reid Cooper @kelsey
              last edited by

              @kelsey said in Virtualization and HA, Scalability:

              @tim_g hi is there a website about scalable for information

              Pretty much any hyperconvergence vender will have info on their site.

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              • stacksofplatesS
                stacksofplates
                last edited by

                So there's another way I don't think I've seen anyone mention. That's doing application level HA. Rather than relying on the hosts to replicate data between each other, you just run multiple instances of a service. Then you have some kind of scheduler decide where the VM needs to live. That could be a person (if you're manually building), your orchestration tool by just defining which machine you want it to run on, or programmatically (like with cloud infrastructure). Then you can use a service discovery tool like Consul to register that service and have it added to your load balancer. Consul also does health checks that you script (for instance if you get anything other than a 200 response from a site it's unhealthy) and then it will auto remove it from the pool of available systems.

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

                  There's also the container schedulers and service discovery tools like Kubernetes. You define how many pods you want running and Kubernetes handles where all of those should run and takes care of ensuring that many exist. If one goes down, it automatically brings another up in it's place.

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                  • scottalanmillerS
                    scottalanmiller @stacksofplates
                    last edited by

                    @stacksofplates said in Virtualization and HA, Scalability:

                    So there's another way I don't think I've seen anyone mention. That's doing application level HA.

                    Her professor is making them focus only on platform level. The impression we have is that he's not familiar with HA at all and doesn't know nearly as much as we'd hope that students would already know!

                    stacksofplatesS J 2 Replies Last reply Reply Quote 2
                    • stacksofplatesS
                      stacksofplates @scottalanmiller
                      last edited by

                      @scottalanmiller said in Virtualization and HA, Scalability:

                      @stacksofplates said in Virtualization and HA, Scalability:

                      So there's another way I don't think I've seen anyone mention. That's doing application level HA.

                      Her professor is making them focus only on platform level. The impression we have is that he's not familiar with HA at all and doesn't know nearly as much as we'd hope that students would already know!

                      Oh my fault. I somehow missed that. Ya good luck doing platform HA with hosted cloud.

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                      • J
                        Jimmy9008 @scottalanmiller
                        last edited by

                        @scottalanmiller said in Virtualization and HA, Scalability:

                        @stacksofplates said in Virtualization and HA, Scalability:

                        So there's another way I don't think I've seen anyone mention. That's doing application level HA.

                        Her professor is making them focus only on platform level. The impression we have is that he's not familiar with HA at all and doesn't know nearly as much as we'd hope that students would already know!

                        This is the same in the UK. Lecturers get their content and generally stick to it, they teach. They don't have the skills to actually understand if the content is true, valid, good etc - because if they did, they would work in IT and not teach it.

                        scottalanmillerS 1 Reply Last reply Reply Quote 2
                        • scottalanmillerS
                          scottalanmiller @Jimmy9008
                          last edited by

                          @jimmy9008 said in Virtualization and HA, Scalability:

                          @scottalanmiller said in Virtualization and HA, Scalability:

                          @stacksofplates said in Virtualization and HA, Scalability:

                          So there's another way I don't think I've seen anyone mention. That's doing application level HA.

                          Her professor is making them focus only on platform level. The impression we have is that he's not familiar with HA at all and doesn't know nearly as much as we'd hope that students would already know!

                          This is the same in the UK. Lecturers get their content and generally stick to it, they teach. They don't have the skills to actually understand if the content is true, valid, good etc - because if they did, they would work in IT and not teach it.

                          OP is in the UK 🙂

                          But it is same in the US for sure.

                          1 Reply Last reply Reply Quote 2
                          • TheDeepStorageT
                            TheDeepStorage Vendor
                            last edited by

                            Hi Kelsey,

                            First of all, as previously mentioned in the thread, the IPOD scenario is absolutely atrocious no matter how you look at it. You pay more to get more hardware to manage to get lower resiliency. Here is a very short paper on why it's particularly important to have HA or FT in a virtual inrastructure:
                            https://www.starwindsoftware.com/fault-tolerance-and-high-availability-page

                            A way to play around IPOD is replicating local storage across the hypervisor hosts. Here is a doc describing how it's done:
                            https://www.starwindsoftware.com/whitepapers/starwind-virtual-san-whitepaper.pdf

                            Also, our forums are pretty helpful and you can ask different virtualization, storage, HA questions there:
                            https://forums.starwindsoftware.com

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