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    Xenserver and Storage

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    • DanpD
      Danp @olivier
      last edited by

      @olivier From their FAQ --

      Is HA-Lizard only for 2-node pools?

      No. HA-Lizard works with any number of hosts within a pool and provides reliable high availability in a 2-node pool.

      1 Reply Last reply Reply Quote 0
      • olivierO
        olivier
        last edited by

        It very likely means: replicate blocks are made on 2 nodes, and then other pool members are connected to this setup. It doesn't mean storage is scaled on all local SR within all hosts.

        That's also something you could do on XOSAN: use a limited number of hosts to store data (from 2 to n). But you could also use all of them.

        So in HA Lizard case, it means if you lose 2 hosts on a 16 pool for example, your data is gone.

        Hope it's more clear this way 🙂

        1 Reply Last reply Reply Quote 0
        • DustinB3403D
          DustinB3403
          last edited by

          Halizard can work, but I'd highly recommend paying for support. I had issues with it, and while support was awesome, it's not something worth deploying yourself.

          1 Reply Last reply Reply Quote 1
          • DustinB3403D
            DustinB3403
            last edited by DustinB3403

            You could also look at starwinds vsan and use either a windows controller on each server, or go with the linux controllers that they recently released.

            Reid CooperR 1 Reply Last reply Reply Quote 1
            • Reid CooperR
              Reid Cooper @DustinB3403
              last edited by

              @dustinb3403 said in Xenserver and Storage:

              You could also look at state d's vsan and use either a windows controller on each server, or go with the linux controllers that they recently released.

              State D?

              DustinB3403D 1 Reply Last reply Reply Quote 0
              • DustinB3403D
                DustinB3403 @Reid Cooper
                last edited by

                @reid-cooper spellcheck on mobile, I corrected it. Starwinds.

                1 Reply Last reply Reply Quote 0
                • Reid CooperR
                  Reid Cooper
                  last edited by

                  That makes a bit more sense.

                  1 Reply Last reply Reply Quote 0
                  • dbeatoD
                    dbeato @olivier
                    last edited by

                    @olivier I would not do HA Lizard, it is problematic with XenServer. You can ask @StorageNinja . I have gone through many SW posts having issues with this. I did recommend it once but it was not worth it. XOSAN will be much better
                    https://xen-orchestra.com/blog/xenserver-hyperconverged-with-xosan/
                    or if you can afford two more host with WIndows Server and StarWind VSAN then it would be good too.

                    DustinB3403D S 2 Replies Last reply Reply Quote 0
                    • DustinB3403D
                      DustinB3403 @dbeato
                      last edited by

                      @dbeato You can completely skip Windows and use the Linux VSAN controllers.

                      https://www.starwindsoftware.com/announcing-new-linux-based-starwind-virtual-storage-appliance-video

                      dbeatoD jrcJ 2 Replies Last reply Reply Quote 1
                      • dbeatoD
                        dbeato @DustinB3403
                        last edited by

                        @dustinb3403 Even more amazing!! Thanks for the share. I didn't know.

                        DustinB3403D 1 Reply Last reply Reply Quote 0
                        • DustinB3403D
                          DustinB3403 @dbeato
                          last edited by

                          @dbeato said in Xenserver and Storage:

                          @dustinb3403 Even more amazing!! Thanks for the share. I didn't know.

                          Yup, pretty much makes the setup impossible to beat, as you don't ever need to introduce Microsoft into the environment.

                          1 Reply Last reply Reply Quote 1
                          • jrcJ
                            jrc
                            last edited by

                            Can someone give me an overview what a VSAN setup would physically and software wise look like. Sounds like there is a controller involved, would this run on the host? Both hosts? Stand alone hardware?

                            What is the general cost for Starwind's VSAN stuff? Is it a perpetual licence or a per year thing?

                            scottalanmillerS DustinB3403D 3 Replies Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @jrc
                              last edited by

                              @jrc said in Xenserver and Storage:

                              What is the general cost for Starwind's VSAN stuff? Is it a perpetual licence or a per year thing?

                              They have totally free versions.

                              1 Reply Last reply Reply Quote 0
                              • DustinB3403D
                                DustinB3403 @jrc
                                last edited by

                                @jrc said in Xenserver and Storage:

                                Can someone give me an overview what a VSAN setup would physically and software wise look like. Sounds like there is a controller involved, would this run on the host? Both hosts? Stand alone hardware?

                                What is the general cost for Starwind's VSAN stuff? Is it a perpetual licence or a per year thing?

                                Paging @KOOLER

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

                                  @jrc said in Xenserver and Storage:

                                  Can someone give me an overview what a VSAN setup would physically and software wise look like. Sounds like there is a controller involved, would this run on the host? Both hosts? Stand alone hardware?

                                  It's SAN run on the hosts. VSAN just standard for Virtual SAN. It's really SAN, but it doesn't have any appliance associated with it, so you don't take on all of the risks of external storage, because it is stored on the hypervisor.

                                  1 Reply Last reply Reply Quote 1
                                  • DustinB3403D
                                    DustinB3403
                                    last edited by

                                    @jrc you'd have a VM on each host, running the VSAN software. They'd pool the resources from all of your servers.

                                    Only your hypervisors would be the things needed. No dedicated cabling between the systems, no custom switches, no external storage.

                                    Everything is hyperconverged between your available servers.

                                    1 Reply Last reply Reply Quote 1
                                    • scottalanmillerS
                                      scottalanmiller
                                      last edited by

                                      If you put VSAN on stand alone hardware, it turns back into normal SAN.

                                      1 Reply Last reply Reply Quote 0
                                      • jrcJ
                                        jrc
                                        last edited by

                                        So you have a VM on each host, and you give it all the local storage. It then allows you to connect the host to it via some protocol (iSCSI, NAS etc)? Or does the VM has some sort of extra hook into the OS to manage and share the storage?

                                        Does it basically just keep the storage volumes on each host synced and identical?

                                        What kind of overhead does this create (ie if I have 6Tb in each server, does that mean I actually only have 3Tb of usable space since I need 2 copies of everything, 1 for each server)?

                                        Is there a need for a dedicated link between hosts for sync traffic?

                                        Starwind's stuff is free, which is cool. Is the paid version particularly expensive? I am thinking support would be a good idea, if only for a year.

                                        This just sounds too easy and/or good to be true. As it sounds like I just need to add drives to my 2 hosts and setup some free software and I'd be set. So I am just making sure I know about as many of the considerations as possible before I run this up the flag pole for a budget.

                                        scottalanmillerS 6 Replies Last reply Reply Quote 0
                                        • scottalanmillerS
                                          scottalanmiller @jrc
                                          last edited by

                                          @jrc said in Xenserver and Storage:

                                          So you have a VM on each host, and you give it all the local storage. It then allows you to connect the host to it via some protocol (iSCSI, NAS etc)?

                                          It is VSAN if it uses iSCSI. It is VNAS if it uses NFS or SMB.

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                                          • scottalanmillerS
                                            scottalanmiller @jrc
                                            last edited by

                                            @jrc said in Xenserver and Storage:

                                            Or does the VM has some sort of extra hook into the OS to manage and share the storage?

                                            That would not be VSAN then. It's really SAN. Not something randomly being called SAN. It's just a SAN that isn't on its own hardware.

                                            jrcJ 1 Reply Last reply Reply Quote 0
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