Hello @dthenot
hello @danp
I got the results. You can access our lab, feel free, nothing is productive. Support ID: 40797
High count of VDI / VMs on single SR make entire Storage slow.
[image: 1778273434033-e36db14a-ddd3-4cac-b768-b7bc53b7278c-image-resized.jpeg]
Migration fails because of:
[21:52 xcp-ng-1 ~]# xe sr-scan uuid=43dbbe8e-039a-e66c-f6cb-d88de4f4d962
Error code: SR_BACKEND_FAILURE_1200
Error parameters: , list index out of range,
59 Lines of log:
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ['/sbin/lvchange', '-an', '/dev/VG_XenStorage-43dbbe8e-039a-e66c-f6cb-d88de4f4d962/QCOW2-ffcf4c40-0d81-4da7-9908-478629c88358']
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] pread SUCCESS
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper released
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper acquired
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper sent '56171 - 832.417448266'
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ['/sbin/dmsetup', 'status', 'VG_XenStorage--43dbbe8e--039a--e66c--f6cb--d88de4f4d962-QCOW2--ffcf4c40--0d81--4da7--9908--478629c88358']
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] pread SUCCESS
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper released
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] lock: released /var/lock/sm/lvm-43dbbe8e-039a-e66c-f6cb-d88de4f4d962/ffcf4c40-0d81-4da7-9908-478629c88358
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper acquired
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper sent '56171 - 832.433077125'
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ['/sbin/vgs', '--noheadings', '--nosuffix', '--units', 'b', 'VG_XenStorage-43dbbe8e-039a-e66c-f6cb-d88de4f4d962']
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] pread SUCCESS
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper released
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper acquired
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper sent '56171 - 832.64258113'
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ['/sbin/vgs', '--readonly', 'VG_XenStorage-43dbbe8e-039a-e66c-f6cb-d88de4f4d962']
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] pread SUCCESS
May 8 21:40:34 xcp-ng-2 fairlock[8031]: /run/fairlock/devicemapper released
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] lock: released /var/lock/sm/43dbbe8e-039a-e66c-f6cb-d88de4f4d962/sr
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ***** generic exception: sr_scan: EXCEPTION <class 'IndexError'>, list index out of range
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 113, in run
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return self._run_locked(sr)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] rv = self._run(sr, target)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 377, in _run
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return sr.scan(self.params['sr_uuid'])
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMoHBASR", line 163, in scan
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] LVMSR.LVMSR.scan(self, sr_uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMSR.py", line 822, in scan
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] new_vdi = self.vdi(cbt_uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMoHBASR", line 230, in vdi
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return LVMoHBAVDI(self, uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/VDI.py", line 100, in __init__
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] self.load(uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMSR.py", line 1375, in load
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] size = int(self.sr.srcmd.params['args'][0])
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread]
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ***** LVM over FC: EXCEPTION <class 'IndexError'>, list index out of range
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 392, in run
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] ret = cmd.run(sr)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 113, in run
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return self._run_locked(sr)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 163, in _run_locked
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] rv = self._run(sr, target)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/SRCommand.py", line 377, in _run
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return sr.scan(self.params['sr_uuid'])
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMoHBASR", line 163, in scan
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] LVMSR.LVMSR.scan(self, sr_uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMSR.py", line 822, in scan
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] new_vdi = self.vdi(cbt_uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMoHBASR", line 230, in vdi
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] return LVMoHBAVDI(self, uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/VDI.py", line 100, in __init__
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] self.load(uuid)
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] File "/opt/xensource/sm/LVMSR.py", line 1375, in load
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] size = int(self.sr.srcmd.params['args'][0])
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread]
May 8 21:40:34 xcp-ng-2 SM: [56171][MainThread] lock: closed /var/lock/sm/lvm-43dbbe8e-039a-e66c-f6cb-d88de4f4d962/030878c2-49fd-4b0f-a971-9dfa121249a3
Best regards
Igor