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    Xen Orchestra Delta Restore

    Scheduled Pinned Locked Moved IT Discussion
    xen orchestradeltarestorexenserver 6.5
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    • DustinB3403D
      DustinB3403 @Dashrender
      last edited by

      @Dashrender from multiple points during the process. Fulls and Partials result in a restore to that backup. Here's a picture of the CentOS NFS Share that list all that I created for the system.

      0_1452275903217_2016-01-08_12-57-22.png

      DashrenderD 1 Reply Last reply Reply Quote 0
      • RamblingBipedR
        RamblingBiped
        last edited by

        Very cool, thank you for sharing. I still haven't had enough time to sit down and spin up a XO vm at home yet, but your threads on here have been eating away at me to get it done.

        1 Reply Last reply Reply Quote 2
        • DashrenderD
          Dashrender @DustinB3403
          last edited by

          @DustinB3403 said:

          @Dashrender from multiple points during the process. Fulls and Partials result in a restore to that backup. Here's a picture of the CentOS NFS Share that list all that I created for the system.

          I'm not sure this answers my question.

          If you took a baseline image/backup 4 hours ago, then took a partial 2 hours ago, then another partial now, would the the second partial backup all of the changes since the baseline 4 hours ago, or from the partial from 2 hours ago?

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

            @Dashrender You can see in the screenshot above that there are delta's and full backup's created.

            The partials copy the changes from whenever the full was last created.

            DashrenderD scottalanmillerS 2 Replies Last reply Reply Quote 0
            • DashrenderD
              Dashrender @DustinB3403
              last edited by

              @DustinB3403 said:

              @Dashrender You can see in the screenshot above that there are delta's and full backup's created.

              The partials copy the changes from whenever the full was last created.

              OK - thanks.

              I really like the incremental forever solution I currently have.

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

                @scottalanmiller maybe I misunderstand it, so I'm asking for your expertise.

                Wouldn't "Rolling Snapshots" in XO be the Forever incremental that @Dashrender is looking for?

                scottalanmillerS 1 Reply Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @DustinB3403
                  last edited by

                  @DustinB3403 said:

                  @Dashrender You can see in the screenshot above that there are delta's and full backup's created.

                  The partials copy the changes from whenever the full was last created.

                  Calling them partials is really confusing. The industry terms are incrementals and differentials. These would be differentials then. If we use the right terms, there is no ambiguity.

                  DashrenderD 1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @DustinB3403
                    last edited by

                    @DustinB3403 said:

                    @scottalanmiller maybe I misunderstand it, so I'm asking for your expertise.

                    Wouldn't "Rolling Snapshots" in XO be the Forever incremental that @Dashrender is looking for?

                    I've not looked at that feature. Do you have a link to their documentation on it?

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

                      @scottalanmiller https://xen-orchestra.com/blog/xen-orchestra-documentation-2/

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

                        @scottalanmiller said:

                        @DustinB3403 said:

                        @Dashrender You can see in the screenshot above that there are delta's and full backup's created.

                        The partials copy the changes from whenever the full was last created.

                        Calling them partials is really confusing. The industry terms are incrementals and differentials. These would be differentials then. If we use the right terms, there is no ambiguity.

                        I used the term partial because until Dustin's post in the XO thread if they were incrementals or differentials.

                        though as usual, you're right 🙂

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

                          Here it is. https://xen-orchestra.com/docs/rolling_snapshots.html

                          This is really what it sounds like and not backups at all. You could use it to build your own backup solution, but on its own it isn't one. It is just snapshots for version rollback locally.

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

                            Guys,

                            You should ping me or create GitHub issues when you have concerns, bug report or questions about XO 😉

                            For the restore without knowing what's happening: I just updated this yesterday, now the VM is named "[Importing...] VMname" until the restore is completed. See https://github.com/vatesfr/xo-web/issues/641

                            Already closed, so out for 4.12 around Jan 15 🙂

                            About "Forever forward incremental backup", allowing you to avoid any full export after the initial one, it consists of:

                            • merging offline (ie: without Xen, by ourselves) the original full backup with its contiguous snaphot
                            • doing step each time, step by step

                            So you never need to re-export the full stuff after the first time. A good illustration here, from VEEAM:

                            This should be out in 4.13 (end of Jan.), 4.12 with some luck.

                            DustinB3403D 1 Reply Last reply Reply Quote 3
                            • DustinB3403D
                              DustinB3403 @olivier
                              last edited by

                              @olivier sorry Olivier we know you're busy, and I'm the defacto "XS Fan here...." so I play with a lot of the fun stuff and post some cool topics.

                              olivierO 1 Reply Last reply Reply Quote 0
                              • DashrenderD
                                Dashrender
                                last edited by

                                LOL, just ask and ye shall receive.

                                Awesome @olivier

                                1 Reply Last reply Reply Quote 0
                                • DashrenderD
                                  Dashrender
                                  last edited by

                                  Though a question to Scott's point - are vib files backup files or are they Xen image snaps?

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

                                    @Dashrender said:

                                    Though a question to Scott's point - are vib files backup files or are they Xen image snaps?

                                    Those are Veeam backups. He's just using their diagram. 🙂

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

                                      @scottalanmiller said:

                                      @Dashrender said:

                                      Though a question to Scott's point - are vib files backup files or are they Xen image snaps?

                                      Those are Veeam backups. He's just using their diagram. 🙂

                                      oh yeah /headslap, but the question still stands to your original point.

                                      @scottalanmiller said:

                                      Here it is. https://xen-orchestra.com/docs/rolling_snapshots.html

                                      This is really what it sounds like and not backups at all. You could use it to build your own backup solution, but on its own it isn't one. It is just snapshots for version rollback locally.

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

                                        Yes, that was just VEEAM diagrams 😉

                                        The delta files *.vhd (if it's the original question) are just "blocks" diff between two disk "states": a "moving" disk (the current VM disk) and a snapshot (which is "frozen", like a photo, that's the definition of a snapshot).

                                        To restore it properly, you need to be sure you "inject" the delta inside a coherent VM disk (if you apply delta on a different disk, it will be a mess. Even if you inject a delta on the "wrong" disk state, a mess too).

                                        That's why we got JSON files to indicate the snapshot chain. We'll apply each delta to stay consistent.

                                        1 Reply Last reply Reply Quote 0
                                        • olivierO
                                          olivier @DustinB3403
                                          last edited by

                                          @DustinB3403 No worries 😉 But if you need an explanation on any XOA stuff, feel free to ping me. I'll come if I can 🙂

                                          1 Reply Last reply Reply Quote 4
                                          • coliverC
                                            coliver
                                            last edited by

                                            It is really nice to have one of the developers in the community! That cleared up a lot of confusion really quickly.

                                            olivierO 1 Reply Last reply Reply Quote 1
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