XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    Disater recovery backups crazy slow

    Scheduled Pinned Locked Moved Backup
    27 Posts 4 Posters 4.9k Views 4 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • L Offline
      ludovic78 @olivierlambert
      last edited by

      @olivierlambert Just to make sure we are talking about the same thing cr is continous replication and dr disaster recovery right?

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

        Yes. Similar function, just done differently (XVA export vs VDI export).

        1 Reply Last reply Reply Quote 0
        • C Offline
          comdirect @olivierlambert
          last edited by

          @olivierlambert that's what I did and performance is fine. Soon as I choose dr (disaster recovery) it takes 2 5 times longer.

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

            So don't use it. When you use DR, are you using compression or not?

            1 Reply Last reply Reply Quote 0
            • L Offline
              ludovic78
              last edited by

              It behaves differently and puts much less stress on the cpu
              Unfortunately, the speed is still a problem.

              78cd3dd0-ae21-4dc3-99d9-6f3536fe5791-image.png

              1 Reply Last reply Reply Quote 0
              • L Offline
                ludovic78
                last edited by

                I will put my xoa on another host maybe this will help

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

                  Your Dom0 might be not powerful enough to generate XVAs at a reasonable speed, so switch to CR and the issue is solved 🙂

                  L 1 Reply Last reply Reply Quote 0
                  • L Offline
                    ludovic78 @olivierlambert
                    last edited by

                    @olivierlambert

                    I set the dom0 ram to 16gig on all hosts a while ago, the hosts (4) run on a dell r530 with two 2690 cpu's and 192gig ram.

                    What can I do to improve dom0?

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

                      Rather old CPUs (launched in 2012, so 12y old CPU), I'm not really surprised that XVA generation is slow. You can check if you are in Max Power mode in the BIOS though, maybe you are not and Xen can't boost to turbo.

                      But in any case, switch to CR.

                      L C 2 Replies Last reply Reply Quote 0
                      • L Offline
                        ludovic78 @olivierlambert
                        last edited by

                        @olivierlambert Ok I will look into this, are there any other bios setting that I would best adjust or set?

                        Thank you for your help if this does not help, I will open another topic next week.

                        Have a nice weekend!

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

                          That should be it. But due to the old CPU, I wouldn't expect XVA generation to be a lot faster.

                          1 Reply Last reply Reply Quote 0
                          • C Offline
                            comdirect @olivierlambert
                            last edited by

                            @olivierlambert 2x x5680 xeons 3.3ghz 24 cores should be able to generate xvas I would think so ?

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

                              They are able, but not at a great speed. It doesn't matter how many cores, it's likely heavily single threaded and relying on how fast you can do many efficient instructions per cycle. That's why you should switch to CR.

                              1 Reply Last reply Reply Quote 0
                              • First post
                                Last post