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    CBT: the thread to centralize your feedback

    Scheduled Pinned Locked Moved
    Backup
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    • julien-fJ
      julien-f Vates 🪐 Co-Founder XO Team @rtjdamen
      last edited by

      @rtjdamen We are investigating it as well 🙂

      For the XO backend team, the next few months are focused on stabilization, bug fixes and maintenance 🙂

      A 1 Reply Last reply Reply Quote 0
      • A
        Andrew Top contributor @julien-f
        last edited by

        @julien-f @florent @olivierlambert I'm using XO source master (commit c5f6b). Running Continuous Replication with NBD+CBT and Purge Snapshot. With a single (one) NBD connection on the backup job, things work correctly. With two NBD connections I see some Orphan VDIs left almost every time after the backup job runs. They are different ones each time.

        F 1 Reply Last reply Reply Quote 0
        • F
          flakpyro @Andrew
          last edited by

          I noticed when migrating some VDIs with CBT enabled from one NFS SR another that the CBT only snapshots are left behind. Perhaps this is why a full backup seems to be required after a storage migration?

          R 1 Reply Last reply Reply Quote 0
          • R
            rtjdamen @flakpyro
            last edited by

            @flakpyro i know from our other backup software we use that migrating cbt enabled vdi’s is not supported on xen, when u migrate between sr it will disable cbt on that vdi. This is causing a new full. This is by design

            https://github.com/vatesfr/xen-orchestra/pull/7756

            fbeauchamp opened this pull request in vatesfr/xen-orchestra

            closed feat(xo-server): disable cbt on vdi/VM/host migration #7756

            F 1 Reply Last reply Reply Quote 0
            • F
              flakpyro @rtjdamen
              last edited by

              @rtjdamen Makes sense, it would be nice is XOA cleaned up these small CBT snapshots though after a migration from one SR to another.

              R 1 Reply Last reply Reply Quote 1
              • R
                rtjdamen @flakpyro
                last edited by

                @flakpyro indeed, sounds like a bug. It should delete the snapshot, disable cbt and then migrate to the other sr.

                1 Reply Last reply Reply Quote 0
                • Tristis OrisT
                  Tristis Oris
                  last edited by

                  I've been out of life for a while.
                  is it any known problem with CBT file restore?
                  b11b7872-c829-4cba-8f38-1e199fd7cbe1-image.png

                  M A 2 Replies Last reply Reply Quote 0
                  • M
                    manilx @Tristis Oris
                    last edited by

                    @Tristis-Oris Working fine here, with cbt backups.

                    1 Reply Last reply Reply Quote 0
                    • A
                      Andrew Top contributor @Tristis Oris
                      last edited by

                      @Tristis-Oris Is your backed up VM using LVM for it's root filesystem?

                      Tristis OrisT M 2 Replies Last reply Reply Quote 0
                      • Tristis OrisT
                        Tristis Oris @Andrew
                        last edited by

                        @Andrew most of them, yes.

                        A 1 Reply Last reply Reply Quote 0
                        • A
                          Andrew Top contributor @Tristis Oris
                          last edited by

                          @Tristis-Oris This is a known issue from before and not related to CBT backups.

                          Message Posting File restore error on LVMs

                          File level restoration not working on LVM partition #7029
                          (https://github.com/vatesfr/xen-orchestra/issues/7029)

                          andrew64k created this issue in vatesfr/xen-orchestra

                          open File level restoration not working on LVM partition #7029

                          Tristis OrisT 1 Reply Last reply Reply Quote 0
                          • Tristis OrisT
                            Tristis Oris @Andrew
                            last edited by

                            @Andrew got it. i miss that ticket.

                            1 Reply Last reply Reply Quote 0
                            • M
                              manilx @Andrew
                              last edited by

                              @Andrew ext4 or windows

                              1 Reply Last reply Reply Quote 0
                              • F
                                frank-s
                                last edited by

                                Hi, I am running from the sources and I'm almost up to date (991b4) . Can anyone please tell me what this means "Error: can't create a stream from a metadata VDI, fall back to a base". Restarting the backup results in a full backup rather than an incremental.
                                Thanks.

                                436b4e04-ffee-4afe-b605-db05abf63ad3-image.png

                                DanpD 1 Reply Last reply Reply Quote 0
                                • DanpD
                                  Danp Vates 🪐 Pro Support Team @frank-s
                                  last edited by

                                  @frank-s This PR is where the update occurred -- https://github.com/vatesfr/xen-orchestra/pull/7836

                                  @florent should be able to explain the meaning.

                                  fbeauchamp opened this pull request in vatesfr/xen-orchestra

                                  closed feat(nbd-client/multi): harden NBD backups #7836

                                  M 1 Reply Last reply Reply Quote 0
                                  • M
                                    manilx @Danp
                                    last edited by

                                    Getting coalesce stuck on one SR, NFS share.
                                    After running a Continuous Replication job. When I use an internal SSD as the target this does not happen.

                                    Jul 26 22:32:19 npb7 SMGC: [2253452] Another GC instance already active, exiting
Jul 26 22:32:19 npb7 SMGC: [2253452] In cleanup
Jul 26 22:32:19 npb7 SMGC: [2253452] SR 0d9e ('TBS-h574TX') (0 VDIs in 0 VHD trees): no changes
Jul 26 22:32:49 npb7 SMGC: [2253692] === SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110: gc ===
Jul 26 22:32:49 npb7 SMGC: [2253722] Will finish as PID [2253723]
Jul 26 22:32:49 npb7 SMGC: [2253692] New PID [2253722]
Jul 26 22:32:49 npb7 SMGC: [2253723] Found 0 cache files
Jul 26 22:32:49 npb7 SMGC: [2253723] Another GC instance already active, exiting
Jul 26 22:32:49 npb7 SMGC: [2253723] In cleanup
Jul 26 22:32:49 npb7 SMGC: [2253723] SR 0d9e ('TBS-h574TX') (0 VDIs in 0 VHD trees): no changes
Jul 26 22:33:19 npb7 SMGC: [2253917] === SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110: gc ===
Jul 26 22:33:19 npb7 SMGC: [2253947] Will finish as PID [2253948]
Jul 26 22:33:19 npb7 SMGC: [2253917] New PID [2253947]
Jul 26 22:33:19 npb7 SMGC: [2253948] Found 0 cache files
Jul 26 22:33:19 npb7 SMGC: [2253948] Another GC instance already active, exiting
Jul 26 22:33:19 npb7 SMGC: [2253948] In cleanup
Jul 26 22:33:19 npb7 SMGC: [2253948] SR 0d9e ('TBS-h574TX') (0 VDIs in 0 VHD trees): no changes
Jul 26 22:33:49 npb7 SMGC: [2254139] === SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110: gc ===
Jul 26 22:33:49 npb7 SMGC: [2254172] Will finish as PID [2254173]
Jul 26 22:33:49 npb7 SMGC: [2254139] New PID [2254172]
Jul 26 22:33:49 npb7 SMGC: [2254173] Found 0 cache files
Jul 26 22:33:49 npb7 SMGC: [2254173] Another GC instance already active, exiting
Jul 26 22:33:49 npb7 SMGC: [2254173] In cleanup
Jul 26 22:33:49 npb7 SMGC: [2254173] SR 0d9e ('TBS-h574TX') (0 VDIs in 0 VHD trees): no changes
Jul 26 22:33:49 npb7 SMGC: [2251795]   Child process completed successfully
Jul 26 22:33:49 npb7 SMGC: [2251795] GC active, quiet period ended
Jul 26 22:33:50 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:33:50 npb7 SMGC: [2251795] Got on-boot for 82664934(60.000G/2.914G?): 'persist'
Jul 26 22:33:50 npb7 SMGC: [2251795] Got allow_caching for 82664934(60.000G/2.914G?): False
Jul 26 22:33:50 npb7 SMGC: [2251795] Got other-config for 82664934(60.000G/2.914G?): {'xo:backup:job': '4c084697-6efd-4e35-a4ff-74ae50824c8b', 'xo:backup:datetime': '20240726T20:00:30Z', 'xo:backup:schedule': 'b1cef1e3-e313-409b-ad40-017076f115ce', 'xo:backup:vm': 'd6a5d420-72e6-5c87-a3af-b5eb5c4a44dd', 'xo:backup:sr': '0d9ee24c-ea59-e0e6-8c04-a9a65c22f110', 'content_id': '4be773b3-10dc-9a12-1f82-f575f5f6555b', 'xo:copy_of': 'bb4d2fa2-6241-4856-b196-39f16894f5ef'}
Jul 26 22:33:50 npb7 SMGC: [2251795] Removed vhd-blocks from 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Set vhd-blocks = 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 for 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Set vhd-blocks = eJz73/7//H+ag8O4pRhobzteMND2N4zaP2o/0eD3ANtPdfBngPPfjxFu/4eBLv9GwcgGDwbW+oFO/w2j9o/aPwpGMGhgGEgwUPbT2/+4Qh8Aq3GH/w== for *d3a809af(60.000G/54.305G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Num combined blocks = 27750
Jul 26 22:33:50 npb7 SMGC: [2251795] Coalesced size = 54.305G
Jul 26 22:33:50 npb7 SMGC: [2251795] Leaf-coalesce candidate: 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:33:50 npb7 SMGC: [2251795] Got sm-config for *d3a809af(60.000G/54.305G?): {'vhd-blocks': 'eJz73/7//H+ag8O4pRhobzteMND2N4zaP2o/0eD3ANtPdfBngPPfjxFu/4eBLv9GwcgGDwbW+oFO/w2j9o/aPwpGMGhgGEgwUPbT2/+4Qh8Aq3GH/w=='}
Jul 26 22:33:50 npb7 SMGC: [2251795] Got on-boot for 82664934(60.000G/2.914G?): 'persist'
Jul 26 22:33:50 npb7 SMGC: [2251795] Got allow_caching for 82664934(60.000G/2.914G?): False
Jul 26 22:33:50 npb7 SMGC: [2251795] Got other-config for 82664934(60.000G/2.914G?): {'xo:backup:job': '4c084697-6efd-4e35-a4ff-74ae50824c8b', 'xo:backup:datetime': '20240726T20:00:30Z', 'xo:backup:schedule': 'b1cef1e3-e313-409b-ad40-017076f115ce', 'xo:backup:vm': 'd6a5d420-72e6-5c87-a3af-b5eb5c4a44dd', 'xo:backup:sr': '0d9ee24c-ea59-e0e6-8c04-a9a65c22f110', 'content_id': '4be773b3-10dc-9a12-1f82-f575f5f6555b', 'xo:copy_of': 'bb4d2fa2-6241-4856-b196-39f16894f5ef'}
Jul 26 22:33:50 npb7 SMGC: [2251795] Removed vhd-blocks from 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Set vhd-blocks = 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 for 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Set vhd-blocks = eJz73/7//H+ag8O4pRhobzteMND2N4zaP2o/0eD3ANtPdfBngPPfjxFu/4eBLv9GwcgGDwbW+oFO/w2j9o/aPwpGMGhgGEgwUPbT2/+4Qh8Aq3GH/w== for *d3a809af(60.000G/54.305G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Num combined blocks = 27750
Jul 26 22:33:50 npb7 SMGC: [2251795] Coalesced size = 54.305G
Jul 26 22:33:50 npb7 SMGC: [2251795] Leaf-coalesce candidate: 82664934(60.000G/2.914G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] Leaf-coalescing 82664934(60.000G/2.914G?) -> *d3a809af(60.000G/54.305G?)
Jul 26 22:33:50 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:33:50 npb7 SMGC: [2251795] Got other-config for 82664934(60.000G/2.914G?): {'xo:backup:job': '4c084697-6efd-4e35-a4ff-74ae50824c8b', 'xo:backup:datetime': '20240726T20:00:30Z', 'xo:backup:schedule': 'b1cef1e3-e313-409b-ad40-017076f115ce', 'xo:backup:vm': 'd6a5d420-72e6-5c87-a3af-b5eb5c4a44dd', 'xo:backup:sr': '0d9ee24c-ea59-e0e6-8c04-a9a65c22f110', 'content_id': '4be773b3-10dc-9a12-1f82-f575f5f6555b', 'xo:copy_of': 'bb4d2fa2-6241-4856-b196-39f16894f5ef'}
Jul 26 22:33:50 npb7 SMGC: [2251795]   Running VHD coalesce on 82664934(60.000G/2.914G?)
Jul 26 22:34:02 npb7 SMGC: [2251795] *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jul 26 22:34:02 npb7 SMGC: [2251795]          ***********************
Jul 26 22:34:02 npb7 SMGC: [2251795]          *  E X C E P T I O N  *
Jul 26 22:34:02 npb7 SMGC: [2251795]          ***********************
Jul 26 22:34:02 npb7 SMGC: [2251795] _doCoalesceLeaf: EXCEPTION <class 'util.SMException'>, Timed out
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2450, in _liveLeafCoalesce
Jul 26 22:34:02 npb7 SMGC: [2251795]     self._doCoalesceLeaf(vdi)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2484, in _doCoalesceLeaf
Jul 26 22:34:02 npb7 SMGC: [2251795]     vdi._coalesceVHD(timeout)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 934, in _coalesceVHD
Jul 26 22:34:02 npb7 SMGC: [2251795]     self.sr.uuid, abortTest, VDI.POLL_INTERVAL, timeOut)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 189, in runAbortable
Jul 26 22:34:02 npb7 SMGC: [2251795]     raise util.SMException("Timed out")
Jul 26 22:34:02 npb7 SMGC: [2251795]
Jul 26 22:34:02 npb7 SMGC: [2251795] *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jul 26 22:34:02 npb7 SMGC: [2251795] *** UNDO LEAF-COALESCE
Jul 26 22:34:02 npb7 SMGC: [2251795] *** leaf-coalesce undo successful
Jul 26 22:34:02 npb7 SMGC: [2251795] Got sm-config for 82664934(60.000G/2.914G?): {'paused': 'true', 'vhd-blocks': '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', 'vhd-parent': 'd3a809af-ea4d-438b-a7e3-bc6a125bd35e'}
Jul 26 22:34:02 npb7 SMGC: [2251795] Unpausing VDI 82664934(60.000G/2.914G?)
Jul 26 22:34:02 npb7 SMGC: [2251795] Got sm-config for 82664934(60.000G/2.914G?): {'vhd-blocks': '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', 'vhd-parent': 'd3a809af-ea4d-438b-a7e3-bc6a125bd35e'}
Jul 26 22:34:02 npb7 SMGC: [2251795] In cleanup
Jul 26 22:34:02 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:34:02 npb7 SMGC: [2251795] Removed leaf-coalesce from 82664934(60.000G/2.914G?)
Jul 26 22:34:02 npb7 SMGC: [2251795] *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jul 26 22:34:02 npb7 SMGC: [2251795]          ***********************
Jul 26 22:34:02 npb7 SMGC: [2251795]          *  E X C E P T I O N  *
Jul 26 22:34:02 npb7 SMGC: [2251795]          ***********************
Jul 26 22:34:02 npb7 SMGC: [2251795] leaf-coalesce: EXCEPTION <class 'util.SMException'>, Timed out
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2046, in coalesceLeaf
Jul 26 22:34:02 npb7 SMGC: [2251795]     self._coalesceLeaf(vdi)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2328, in _coalesceLeaf
Jul 26 22:34:02 npb7 SMGC: [2251795]     return self._liveLeafCoalesce(vdi)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2450, in _liveLeafCoalesce
Jul 26 22:34:02 npb7 SMGC: [2251795]     self._doCoalesceLeaf(vdi)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 2484, in _doCoalesceLeaf
Jul 26 22:34:02 npb7 SMGC: [2251795]     vdi._coalesceVHD(timeout)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 934, in _coalesceVHD
Jul 26 22:34:02 npb7 SMGC: [2251795]     self.sr.uuid, abortTest, VDI.POLL_INTERVAL, timeOut)
Jul 26 22:34:02 npb7 SMGC: [2251795]   File "/opt/xensource/sm/cleanup.py", line 189, in runAbortable
Jul 26 22:34:02 npb7 SMGC: [2251795]     raise util.SMException("Timed out")
Jul 26 22:34:02 npb7 SMGC: [2251795]
Jul 26 22:34:02 npb7 SMGC: [2251795] *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jul 26 22:34:02 npb7 SMGC: [2251795] Leaf-coalesce failed on 82664934(60.000G/2.914G?), skipping
Jul 26 22:34:02 npb7 SMGC: [2251795] In cleanup
Jul 26 22:34:02 npb7 SMGC: [2251795] Starting asynch srUpdate for SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110
Jul 26 22:34:03 npb7 SMGC: [2251795] SR.update_asynch status changed to [success]
Jul 26 22:34:03 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:34:03 npb7 SMGC: [2251795] Got sm-config for *d3a809af(60.000G/54.305G?): {'vhd-blocks': 'eJz73/7//H+ag8O4pRhobzteMND2N4zaP2o/0eD3ANtPdfBngPPfjxFu/4eBLv9GwcgGDwbW+oFO/w2j9o/aPwpGMGhgGEgwUPbT2/+4Qh8Aq3GH/w=='}
Jul 26 22:34:03 npb7 SMGC: [2251795] No work, exiting
Jul 26 22:34:03 npb7 SMGC: [2251795] GC process exiting, no work left
Jul 26 22:34:03 npb7 SMGC: [2251795] In cleanup
Jul 26 22:34:03 npb7 SMGC: [2251795] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees): no changes
Jul 26 22:34:19 npb7 SMGC: [2254446] === SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110: gc ===
Jul 26 22:34:19 npb7 SMGC: [2254476] Will finish as PID [2254477]
Jul 26 22:34:19 npb7 SMGC: [2254446] New PID [2254476]
Jul 26 22:34:19 npb7 SMGC: [2254477] Found 0 cache files
Jul 26 22:34:19 npb7 SMGC: [2254477] SR 0d9e ('TBS-h574TX') (6 VDIs in 5 VHD trees):
Jul 26 22:34:19 npb7 SMGC: [2254477]         3a763dec(48.002G/29.521G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]         561867f5(20.000G/19.309G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]         ab0314a9(16.000G/7.636G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]         d54d9ec4(24.002G/15.706G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]         *d3a809af(60.000G/54.305G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]             82664934(60.000G/2.914G?)
Jul 26 22:34:19 npb7 SMGC: [2254477]
Jul 26 22:34:19 npb7 SMGC: [2254477] Got on-boot for 82664934(60.000G/2.914G?): 'persist'
Jul 26 22:34:19 npb7 SMGC: [2254477] Got allow_caching for 82664934(60.000G/2.914G?): False
Jul 26 22:34:19 npb7 SMGC: [2254477] Got other-config for 82664934(60.000G/2.914G?): {'xo:backup:job': '4c084697-6efd-4e35-a4ff-74ae50824c8b', 'xo:backup:datetime': '20240726T20:00:30Z', 'xo:backup:schedule': 'b1cef1e3-e313-409b-ad40-017076f115ce', 'xo:backup:vm': 'd6a5d420-72e6-5c87-a3af-b5eb5c4a44dd', 'xo:backup:sr': '0d9ee24c-ea59-e0e6-8c04-a9a65c22f110', 'content_id': '4be773b3-10dc-9a12-1f82-f575f5f6555b', 'xo:copy_of': 'bb4d2fa2-6241-4856-b196-39f16894f5ef'}
Jul 26 22:34:19 npb7 SMGC: [2254477] Removed vhd-blocks from 82664934(60.000G/2.914G?)
Jul 26 22:34:19 npb7 SMGC: [2254477] Set vhd-blocks = 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 for 82664934(60.000G/2.914G?)
Jul 26 22:34:19 npb7 SMGC: [2254477] Set vhd-blocks = eJz73/7//H+ag8O4pRhobzteMND2N4zaP2o/0eD3ANtPdfBngPPfjxFu/4eBLv9GwcgGDwbW+oFO/w2j9o/aPwpGMGhgGEgwUPbT2/+4Qh8Aq3GH/w== for *d3a809af(60.000G/54.305G?)
Jul 26 22:34:19 npb7 SMGC: [2254477] Num combined blocks = 27750
Jul 26 22:34:19 npb7 SMGC: [2254477] Coalesced size = 54.305G
Jul 26 22:34:19 npb7 SMGC: [2254477] Leaf-coalesce candidate: 82664934(60.000G/2.914G?)
Jul 26 22:34:19 npb7 SMGC: [2254477] GC active, about to go quiet
Jul 26 22:34:49 npb7 SMGC: [2254681] === SR 0d9ee24c-ea59-e0e6-8c04-a9a65c22f110: gc ===
Jul 26 22:34:49 npb7 SMGC: [2254715] Will finish as PID [2254716]
Jul 26 22:34:49 npb7 SMGC: [2254681] New PID [2254715]
Jul 26 22:34:49 npb7 SMGC: [2254716] Found 0 cache files
Jul 26 22:34:49 npb7 SMGC: [2254716] Another GC instance already active, exiting
Jul 26 22:34:49 npb7 SMGC: [2254716] In cleanup
Jul 26 22:34:49 npb7 SMGC: [2254716] SR 0d9e ('TBS-h574TX') (0 VDIs in 0 VHD trees): no changes
                                    1 Reply Last reply Reply Quote 0
                                    • olivierlambertO
                                      olivierlambert Vates 🪐 Co-Founder CEO
                                      last edited by

                                      Because you are writing faster in the VM than the garbage collector can merge/coalesce.

                                      You could try to change the leaf coalesce timeout value to see if it's better.

                                      R M 2 Replies Last reply Reply Quote 0
                                      • R
                                        rtjdamen @olivierlambert
                                        last edited by rtjdamen

                                        @manilx we use belows values:

                                        /opt/xensource/sm/cleanup.py :

                                        LIVE_LEAF_COALESCE_MAX_SIZE = 1024 * 1024 * 1024 # bytes
                                        LIVE_LEAF_COALESCE_TIMEOUT = 300 # seconds

                                        Since then we do not see issues like these, leaf coalesce is different from normal coalesce when a snapshot is left behind. I think your problem is:

                                        
Problem 2:

Coalesce due to Timed-out:

Example:

Nov 16 23:25:14 vm6 SMGC: [15312] raise util.SMException("Timed out")

Nov 16 23:25:14 vm6 SMGC: [15312]

Nov 16 23:25:14 vm6 SMGC: [15312] *

Nov 16 23:25:14 vm6 SMGC: [15312] *** UNDO LEAF-COALESCE

This is when the VDI is currently under significant IO stress. If possible, take the VM offline and do an offline coalesce or do the coalesce when the VM has less load. Upcoming versions of XenServer will address this issue more efficiently.

                                        https://support.citrix.com/s/article/CTX201296-understanding-garbage-collection-and-coalesce-process-troubleshooting?language=en_US

                                        M 1 Reply Last reply Reply Quote 0
                                        • D
                                          Delgado
                                          last edited by

                                          I have been seeing this error recently. "VDI must be free or attached to exactly one VM" with quite a few snapshots attached to the control domain when I look at the health dashboard. I am not sure if this is related to the cbt backups but wanted to ask. It seems to only being happening on my delta backups that do have cbt enabled.

                                          1 Reply Last reply Reply Quote 0
                                          • M
                                            manilx @olivierlambert
                                            last edited by

                                            @olivierlambert Actually I don't think this is the case. The VM's are completely idle doing noting.

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