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    XCP-ng 8.0.0 Beta now available!

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    • stormiS Offline
      stormi Vates 🪐 XCP-ng Team @peder
      last edited by

      @peder Thanks! Could you make it fail once again and then produce a bug status report on both hosts with xen-bugtool -y and send the the produced tarballs to the project contact address, or to upload it somewhere temporarily for us to download?

      P 1 Reply Last reply Reply Quote 0
      • olivierlambertO Online
        olivierlambert Vates 🪐 Co-Founder CEO
        last edited by

        I just made a try here, I can't reproduce with the same guest OS and memory settings.

        Are you also doing Xen Storage motion?

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        • P Offline
          peder @stormi
          last edited by

          @stormi I've placed the tarballs here https://student.oedu.se/~peder/xcp-ng/
          I changed the static min to 512M, to match the Fedora case, but it still failed.

          Olivier, I'm not using Xen Storage motion but I am using two old Lenovo L430 Thinkpads as "servers" so that could be part of the problem.

          I'll install a new C7 guest and see if the problem persists.

          1 Reply Last reply Reply Quote 1
          • P Offline
            peder @olivierlambert
            last edited by

            @olivierlambert The VM that fails migration seems to have been created in xcp-ng 7.6 using the "Other Media" template.
            I made a new VM in xcp-ng 8 using the CentOS7 template and I can migrate that just fine with a larger static max.

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            • olivierlambertO Online
              olivierlambert Vates 🪐 Co-Founder CEO
              last edited by

              Can you provide the full VM record of the problematic one? with

              vm param-list uuid=<YOUR FAILING VM UUID>

              Also the same with the one now working, so I can compare.

              P 1 Reply Last reply Reply Quote 0
              • P Offline
                peder @olivierlambert
                last edited by

                @olivierlambert Sure.
                I've put the param-list logs as well as the VMs (sans the Disk) on https://student.oedu.se/~peder/xcp-ng/

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                • olivierlambertO Online
                  olivierlambert Vates 🪐 Co-Founder CEO
                  last edited by

                  So I imported your VM metadata in my lab pool, attached to a VM disk with Debian (so we don't really care about the OS) and it worked 😆

                  I also attached a disk of a previously working CentOS 7 VM, same thing: migration worked 🐹

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                  • P Offline
                    peder
                    last edited by

                    Weird.

                    Maybe it's due to the hardware I'm using. I only have 8 GB RAM in the servers but the migration fails even if I'm not running any other VM.
                    And since it works if static max=dynamic max it shouldn't be a RAM case either.

                    Unless the migration for some reason tries to allocate 2-3 times the amount of RAM if static and dynamic max differ.

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                    • s_mcleodS Offline
                      s_mcleod @MajorTom
                      last edited by

                      @MajorTom Sorry about that I've been (and still am AFK):

                      Corrected link: https://github.com/sammcj/benchmark_results/blob/master/xcpng/8/hyperthreading_impact/test_2_sysbench_prime.md

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                      • A Offline
                        AllooTikeeChaat
                        last edited by AllooTikeeChaat

                        Folks... was at Citrix event today and the morning was a talk by LoginVSI looking at the impact of the latest security patches for Intel CPU's and the performance impact server on EUC work loads and server scalebility on the Hypervisors. According to the presenter all the Hypervisors (Hyper-V, VMware ESX and XenServer) that they were testing were seeing approx 20-25% decrease in performance when using Intel based systems. What I found interesting was VMware has developed a new scheduler, SCAv2 to help reduce the impact although no numbers where mentioned. There was no mention of anything of th sort for XenServer or HyperV.

                        https://blogs.vmware.com/performance/2019/05/new-scheduler-option-for-vsphere-6-7-u2.html

                        According to that blog post .. the impact using the SCAv2 was reduced to 11%.

                        1 Reply Last reply Reply Quote 1
                        • olivierlambertO Online
                          olivierlambert Vates 🪐 Co-Founder CEO
                          last edited by

                          This will come in Xen. In fact, work already started. It's called "core scheduling", and this is the preliminary work before sync scheduling, which is a perfect solution (better perfs AND better security) against Intel CPU flaws.

                          Source: https://lists.xenproject.org/archives/html/xen-devel/2019-05/msg00370.html

                          A 1 Reply Last reply Reply Quote 0
                          • A Offline
                            AllooTikeeChaat @olivierlambert
                            last edited by

                            @olivierlambert

                            Good to know that they're already working on it for Xen. Surprised that none of the Citrix bod's at the event mentioned it. Looks like the best way to do get around the massive performance hit without switching to AMD !

                            olivierlambertO 1 Reply Last reply Reply Quote 0
                            • olivierlambertO Online
                              olivierlambert Vates 🪐 Co-Founder CEO @AllooTikeeChaat
                              last edited by

                              @AllooTikeeChaat I'm always stunned by the fact Citrix communication on Xen is equal to /dev/null, despite all the great efforts made by the Xen devs (half of them are from Citrix!)

                              So as I said, it's not there yet, but it's going into that direction pretty well, I would expect this stuff to be backported in the future I suppose, because it's really powerful!

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                              • D Offline
                                dariosplit
                                last edited by

                                When will the final version of XCP-ng 8.0.0. be available?

                                1 Reply Last reply Reply Quote 0
                                • olivierlambertO Online
                                  olivierlambert Vates 🪐 Co-Founder CEO
                                  last edited by

                                  This will depend a bit on community feedback: more feedback means faster release 🙂

                                  s_mcleodS 1 Reply Last reply Reply Quote 1
                                  • s_mcleodS Offline
                                    s_mcleod @olivierlambert
                                    last edited by

                                    @olivierlambert I’m sorry I’m not more available to bring more testing to the table this week, I am AFK.

                                    1 Reply Last reply Reply Quote 0
                                    • olivierlambertO Online
                                      olivierlambert Vates 🪐 Co-Founder CEO
                                      last edited by

                                      No worries mate! To give a more precise answer, we might target a RC for the end of the month, maybe sooner, IDK yet.

                                      Then if there is no big issue spotted with the RC, release will come near after 🙂

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                                      • P Offline
                                        peder
                                        last edited by

                                        Connecting an iSCSI SR in xsconsole fails if there's a discovery password.
                                        It works if I disable the authentication.

                                        It works in XenOrchestra if I attach it as a new SR (With auth) AND have the same discovery username and password in the ACL of the iqn.
                                        That still doesn't work in xsconsole.

                                        My iscsi server uses targetcli-fb/LIO.

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                                        • olivierlambertO Online
                                          olivierlambert Vates 🪐 Co-Founder CEO
                                          last edited by

                                          Is it something broken before? Because I don't think we ever touched xsconsole outside colors

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                                          • s_mcleodS Offline
                                            s_mcleod
                                            last edited by

                                            I’ve fairly certain I’ve had this problem since xenserver 6.x

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