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    Solved Replication cable

    IT Discussion
    replication linux gluster kvm
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    • stacksofplates
      stacksofplates last edited by

      So I'm going to have two KVM hosts with a few VMs replicated at the disk level with Gluster. The rest of the VMs are all replicated at the application level. Am I crazy by wanting to just use a cable between the two servers and not run through a switch?

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

        You would not want a switch. The switch would just add latency and a point of failure. Best to be switchless when possible.

        stacksofplates 1 Reply Last reply Reply Quote 3
        • scottalanmiller
          scottalanmiller last edited by

          You would not want a switch. The switch would just add latency and a point of failure. Best to be switchless when possible.

          stacksofplates 1 Reply Last reply Reply Quote 3
          • scottalanmiller
            scottalanmiller last edited by

            A switch is handy for when you want to grow to more nodes. You can do three with direct cabling, but that's really the reasonable limit and even then it turns into a pain.

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            • stacksofplates
              stacksofplates @scottalanmiller last edited by

              @scottalanmiller said in Replication cable:

              You would not want a switch. The switch would just add latency and a point of failure. Best to be switchless when possible.

              Ok. I've had some weird looks when I said that's how I wanted to do it. We would need a whole different VLAN for this if we used the switch and we already have enough latency as it is (it's being worked on and out of my control).

              You can do three with direct cabling, but that's really the reasonable limit and even then it turns into a pain.

              Ya this will only be two. I just wanted as simple as possible with the least amount of parts that can fail.

              Thanks!

              scottalanmiller 1 Reply Last reply Reply Quote 0
              • stacksofplates
                stacksofplates last edited by

                So I can't mark any posts as the correct answer except my own. That's kind of pointless? lol

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

                  @stacksofplates said in Replication cable:

                  So I can't mark any posts as the correct answer except my own. That's kind of pointless? lol

                  That's really weird. I'll try to see if that comes up again. I don't think that I've seen that before. If we see it again, we should open a GitLab ticket.

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                  • scottalanmiller
                    scottalanmiller @stacksofplates last edited by

                    @stacksofplates said in Replication cable:

                    Ya this will only be two. I just wanted as simple as possible with the least amount of parts that can fail.

                    Yup, it should be you giving the weird looks to people who want to utilize switches and VLANs for something so simple. Why add risk, cost, latency, complexity, effort, etc.? That's crazy. Even on Wall St., it was always straight cables for this.

                    stacksofplates 1 Reply Last reply Reply Quote 1
                    • stacksofplates
                      stacksofplates @scottalanmiller last edited by

                      @scottalanmiller said in Replication cable:

                      @stacksofplates said in Replication cable:

                      Ya this will only be two. I just wanted as simple as possible with the least amount of parts that can fail.

                      Yup, it should be you giving the weird looks to people who want to utilize switches and VLANs for something so simple. Why add risk, cost, latency, complexity, effort, etc.? That's crazy. Even on Wall St., it was always straight cables for this.

                      I've been giving a good many lately.

                      scottalanmiller 1 Reply Last reply Reply Quote 1
                      • scottalanmiller
                        scottalanmiller @stacksofplates last edited by

                        @stacksofplates I bet!

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                        • stacksofplates
                          stacksofplates last edited by

                          Finally took some time and Gluster is running on both nodes. I get local speed and network replication :).

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

                            @stacksofplates said in Replication cable:

                            Finally took some time and Gluster is running on both nodes. I get local speed and network replication :).

                            Nice

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