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

    SR Garbage Collection running permanently

    Scheduled Pinned Locked Moved Management
    36 Posts 8 Posters 1.3k Views 7 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.
    • Tristis OrisT Offline
      Tristis Oris Top contributor
      last edited by

      I guess I'm a little confused.
      Probably, after fix all bad snapshots been removed, and now they are exist only for hatled (archive) VMs. They got backup only once with such job:
      46bcdd5e-9eed-4fda-8a3c-ff5fe1be5842-image.png

      so without backup tasks, GC for vdi chains not running. Is it safe to remove them manually, or better to run backup task again? (that very long and not required).

      tjkreidlT 1 Reply Last reply Reply Quote 0
      • tjkreidlT Offline
        tjkreidl Ambassador @Tristis Oris
        last edited by tjkreidl

        @Tristis-Oris Do first verify you have good backups before considering deleting snapshots. You could also just export the snapshots associated with the VMs..
        As to the GUI vs. CLI, it should do the same thing, but if it runs, it should show up in the task list.

        1 Reply Last reply Reply Quote 0
        • R Offline
          Razor_648
          last edited by

          Hello, I've migrated 200 VMs from an XCP-NG 8.2 cluster to 8.3 on new iSCSi SRs and I'm encountering quite a few VDIs to coalesce in my various SRs. As a result, I constantly have garbage collection tasks running in the background, taking several hours and restarting each time because there are always VDIs to coalesce. This also has a negative impact on my Vinchin backup jobs, which take a very long time (over 15 minutes to do a snapshot, for example).
          I've set the SR autoscan to false too to prevent this problem but nothing helps.

          I don't have this issue at all with my other 8.2 clusters, is it normal?

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

            Pinging @Team-Storage

            1 Reply Last reply Reply Quote 0
            • ronan-aR Offline
              ronan-a Vates 🪐 XCP-ng Team @Razor_648
              last edited by

              @Razor_648 Do you have any exceptions in your /var/log/SMlog files?

              R 2 Replies Last reply Reply Quote 0
              • R Offline
                Razor_648 @ronan-a
                last edited by

                @ronan-a for example, for ID 3407716 in SMlog for Dom0 master :

                Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] Setting LVM_DEVICE to /dev/disk/by-scsid/3624a93704071cc78f82b4df4000113ee
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] Setting LVM_DEVICE to /dev/disk/by-scsid/3624a93704071cc78f82b4df4000113ee
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] lock: opening lock file /var/lock/sm/5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/sr
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] LVMCache created for VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89
Jul  9 09:44:45 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893214.155789358'
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] ['/sbin/vgs', '--readonly', 'VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] lock: acquired /var/lock/sm/5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/sr
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] LVMCache: will initialize now
Jul  9 09:44:45 na-mut-xen-03 SM: [3407716] LVMCache: refreshing
Jul  9 09:44:46 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893215.105961535'
Jul  9 09:44:46 na-mut-xen-03 SM: [3407716] ['/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:44:46 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:46 na-mut-xen-03 SM: [3407716] lock: released /var/lock/sm/5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/sr
Jul  9 09:44:46 na-mut-xen-03 SM: [3407716] Entering _checkMetadataVolume
Jul  9 09:44:46 na-mut-xen-03 SM: [3407716] vdi_list_changed_blocks {'host_ref': 'OpaqueRef:8bb2bb09-1d56-cb47-6014-91c3eca78529', 'command': 'vdi_list_changed_blocks', 'args': ['OpaqueRef:3a4d6847-eb39-5a96-f2c2-ffcad3da4477'], 'device_config': {'SRmaster': 'true', 'port': '3260', 'SCSIid': '3624a93704071cc78f82b4df4000113ee', 'targetIQN': 'iqn.2010-06.com.purestorage:flasharray.2498b71d53b104d9', 'target': '10.20.0.21', 'multihomelist': '10.20.0.21:3260,10.20.0.22:3260,10.20.1.21:3260,10.20.1.22:3260'}, 'session_ref': '******', 'sr_ref': 'OpaqueRef:78f4538b-4c0b-531c-c523-fd92f8738fc5', 'sr_uuid': '5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89', 'vdi_ref': 'OpaqueRef:05e1857b-f39d-47da-9c06-d0d35ba97f00', 'vdi_location': '9fae176c-2c5f-4fd1-91fd-9bdb32533795', 'vdi_uuid': '9fae176c-2c5f-4fd1-91fd-9bdb32533795', 'subtask_of': 'DummyRef:|dea7f1a8-9116-8be0-6ba8-c3ecac77b442|VDI.list_changed_blocks', 'vdi_on_boot': 'persist', 'vdi_allow_caching': 'false'}
Jul  9 09:44:47 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893215.990307086'
Jul  9 09:44:47 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893216.783648117'
Jul  9 09:44:48 na-mut-xen-03 SM: [3407716] lock: opening lock file /var/lock/sm/9fae176c-2c5f-4fd1-91fd-9bdb32533795/cbtlog
Jul  9 09:44:48 na-mut-xen-03 SM: [3407716] lock: acquired /var/lock/sm/9fae176c-2c5f-4fd1-91fd-9bdb32533795/cbtlog
Jul  9 09:44:48 na-mut-xen-03 SM: [3407716] LVMCache: refreshing
Jul  9 09:44:48 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893217.178993739'
Jul  9 09:44:48 na-mut-xen-03 SM: [3407716] ['/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:44:48 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:49 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893218.029420281'
Jul  9 09:44:49 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-ay', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/9fae176c-2c5f-4fd1-91fd-9bdb32533795.cbtlog']
Jul  9 09:44:49 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:49 na-mut-xen-03 SM: [3407716] ['/usr/sbin/cbt-util', 'get', '-n', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/9fae176c-2c5f-4fd1-91fd-9bdb32533795.cbtlog', '-c']
Jul  9 09:44:49 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:49 na-mut-xen-03 SM: [3407716] fuser /dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/9fae176c-2c5f-4fd1-91fd-9bdb32533795.cbtlog => 1 / '' / ''
Jul  9 09:44:50 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893219.268237038'
Jul  9 09:44:50 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/9fae176c-2c5f-4fd1-91fd-9bdb32533795.cbtlog']
Jul  9 09:44:50 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:51 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893220.721225461'
Jul  9 09:44:51 na-mut-xen-03 SM: [3407716] ['/sbin/dmsetup', 'status', 'VG_XenStorage--5301ae76--31fd--9ff0--7d4c--65c8b1ed8f89-9fae176c--2c5f--4fd1--91fd--9bdb32533795.cbtlog']
Jul  9 09:44:51 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:51 na-mut-xen-03 SM: [3407716] lock: released /var/lock/sm/9fae176c-2c5f-4fd1-91fd-9bdb32533795/cbtlog
Jul  9 09:44:51 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893220.765534349'
Jul  9 09:44:52 na-mut-xen-03 SM: [3407716] lock: opening lock file /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:44:52 na-mut-xen-03 SM: [3407716] lock: acquired /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:44:52 na-mut-xen-03 SM: [3407716] LVMCache: refreshing
Jul  9 09:44:53 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893222.038114535'
Jul  9 09:44:53 na-mut-xen-03 SM: [3407716] ['/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:44:53 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:54 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893222.921315355'
Jul  9 09:44:54 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-ay', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:44:54 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:54 na-mut-xen-03 SM: [3407716] ['/usr/sbin/cbt-util', 'get', '-n', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog', '-s']
Jul  9 09:44:54 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:54 na-mut-xen-03 SM: [3407716] fuser /dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog => 1 / '' / ''
Jul  9 09:44:55 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893224.138058885'
Jul  9 09:44:55 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:44:55 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:56 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893225.053222085'
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] ['/sbin/dmsetup', 'status', 'VG_XenStorage--5301ae76--31fd--9ff0--7d4c--65c8b1ed8f89-54bc2594--5228--411a--a4b2--cc1a7502d9a4.cbtlog']
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] lock: released /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] DEBUG: Processing VDI 54bc2594-5228-411a-a4b2-cc1a7502d9a4 of size 107374182400
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] lock: acquired /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] LVMCache: refreshing
Jul  9 09:44:56 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893225.076140954'
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716] ['/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:44:56 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:57 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893225.934427314'
Jul  9 09:44:57 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-ay', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:44:57 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:57 na-mut-xen-03 SM: [3407716] ['/usr/sbin/cbt-util', 'get', '-n', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog', '-b']
Jul  9 09:44:57 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:44:57 na-mut-xen-03 SM: [3407716] fuser /dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog => 1 / '' / ''
Jul  9 09:44:59 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893227.790063374'
Jul  9 09:44:59 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:44:59 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:00 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893228.82935698'
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] ['/sbin/dmsetup', 'status', 'VG_XenStorage--5301ae76--31fd--9ff0--7d4c--65c8b1ed8f89-54bc2594--5228--411a--a4b2--cc1a7502d9a4.cbtlog']
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] lock: released /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] Size of bitmap: 1638400
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] lock: acquired /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] LVMCache: refreshing
Jul  9 09:45:00 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893229.259729804'
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716] ['/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89']
Jul  9 09:45:00 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:01 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893230.644242194'
Jul  9 09:45:01 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-ay', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:45:02 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:02 na-mut-xen-03 SM: [3407716] ['/usr/sbin/cbt-util', 'get', '-n', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog', '-c']
Jul  9 09:45:02 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:02 na-mut-xen-03 SM: [3407716] fuser /dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog => 1 / '' / ''
Jul  9 09:45:02 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893231.488289557'
Jul  9 09:45:02 na-mut-xen-03 SM: [3407716] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/54bc2594-5228-411a-a4b2-cc1a7502d9a4.cbtlog']
Jul  9 09:45:03 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:04 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893233.069490829'
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] ['/sbin/dmsetup', 'status', 'VG_XenStorage--5301ae76--31fd--9ff0--7d4c--65c8b1ed8f89-54bc2594--5228--411a--a4b2--cc1a7502d9a4.cbtlog']
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   pread SUCCESS
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] lock: released /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:45:04 na-mut-xen-03 fairlock[3949]: /run/fairlock/devicemapper sent '3407716 - 1893233.110222368'
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] Raising exception [460, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]]
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] ***** generic exception: vdi_list_changed_blocks: EXCEPTION <class 'xs_errors.SROSError'>, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 113, in run
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     return self._run_locked(sr)
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     rv = self._run(sr, target)
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 333, in _run
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     return target.list_changed_blocks()
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/VDI.py", line 761, in list_changed_blocks
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     "Source and target VDI are unrelated")
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] ***** LVHD over iSCSI: EXCEPTION <class 'xs_errors.SROSError'>, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 392, in run
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     ret = cmd.run(sr)
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 113, in run
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     return self._run_locked(sr)
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     rv = self._run(sr, target)
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/SRCommand.py", line 333, in _run
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     return target.list_changed_blocks()
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]   File "/opt/xensource/sm/VDI.py", line 761, in list_changed_blocks
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]     "Source and target VDI are unrelated")
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716]
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] lock: closed /var/lock/sm/9fae176c-2c5f-4fd1-91fd-9bdb32533795/cbtlog
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] lock: closed /var/lock/sm/54bc2594-5228-411a-a4b2-cc1a7502d9a4/cbtlog
Jul  9 09:45:04 na-mut-xen-03 SM: [3407716] lock: closed /var/lock/sm/5301ae76-31fd-9ff0-7d4c-65c8b1ed8f89/sr
                R 1 Reply Last reply Reply Quote 0
                • R Offline
                  Razor_648 @Razor_648
                  last edited by

                  This post is deleted!
                  1 Reply Last reply Reply Quote 0
                  • R Offline
                    Razor_648 @ronan-a
                    last edited by

                    @ronan-a Hello, do you have any news please ?
                    I'd like to understand the difference between the 8.2 and 8.3 versions; why is there Garbage Collection in 8.3 and not in 8.2? On what criteria is GC triggered? We've forced autoscan=false, leaf-coalesce=false on the iSCSI SRs in our 8.3 cluster and the SRs are becoming full, I'd like to understand why too, considering my backup jobs have CBT enabled.

                    dthenotD 2 Replies Last reply Reply Quote 0
                    • dthenotD Offline
                      dthenot Vates 🪐 XCP-ng Team @Razor_648
                      last edited by

                      @Razor_648 Hi,

                      The log you showed only mean that it couldn't compare two VDI together using their CBT.
                      It sometimes happen that a CBT chain become disconnected.

                      Disabling leaf-coalesce mean it won't run on leaf, VHD chain will always be 2 depths deep.

                      You migrated 200 VMs, every disks of those VMs had snapshot made that then need to be coalesced, it can take a while.
                      Your backup then also do a snapshot each time while running that need to be coalesced.

                      There are GC in both version of XCP-ng 8.2 and 8.3.
                      The GC is run independently of auto-scan, if you really want to disable it you can do it temporarily using /opt/xensource/sm/cleanup.py -x -u <SR UUID> it will stop the GC until you press enter. I guess you could run it in a tmux to make it stop until next reboot. But it would be better to find the problem or if there really is no problem let the GC work until it's finished.
                      It's a bit weird to need 15 minutes to take a snapshot, it would point to a problem though.
                      Do you have any other error than the CBT one in your SMlog?

                      1 Reply Last reply Reply Quote 0
                      • dthenotD Offline
                        dthenot Vates 🪐 XCP-ng Team @Razor_648
                        last edited by dthenot

                        @Razor_648 While I was writing my previous message, I have been reminded that there are also issues with LVHDoISCSI SR and CBT, you should disable CBT on your backup job and on all VDI on the SR. It might help with the issue.

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