8:09 p.m.
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Hi there,=0A=
=0A=
in the past we already observed that live merge operations may take some ti=
me. =0A=
Currently another of those operations is running on one of our VMs on a=0A=
CentOS 7/qemu 2.3 node. Storage is (async - yeah I know about potential dat=
a =0A=
loss) NFS over 10GBit network. =0A=
=0A=
The operation is running for 50 minutes now with an average throughput of =
=0A=
5MByte/sec. The disk (defined at 400GB) and its snapshots does not show muc=
h =0A=
thin provisioning:=0A=
=0A=
ls -al=0A=
-rw-rw----. 1 vdsm kvm 429496729600 7. Apr 2016 a204865e-ef57-41e0-a2ac=
-465a6c9c3d60=0A=
-rw-rw----. 1 vdsm kvm 203334418432 3. Nov 2016 aeda833f-1f4b-4b6f-b553=
-578f1f3f06ee=0A=
-rw-rw----. 1 vdsm kvm 192091389952 3. Nov 2016 c8acdbc7-af24-4c5c-94c5=
-ae7262d98f5c=0A=
=0A=
du -m a204865e-ef57-41e0-a2ac-465a6c9c3d60=0A=
383070 a204865e-ef57-41e0-a2ac-465a6c9c3d60=0A=
du -m aeda833f-1f4b-4b6f-b553-578f1f3f06ee=0A=
193953 aeda833f-1f4b-4b6f-b553-578f1f3f06ee=0A=
du -m c8acdbc7-af24-4c5c-94c5-ae7262d98f5c=0A=
183222 c8acdbc7-af24-4c5c-94c5-ae7262d98f5c=0A=
=0A=
Usually at some point the process is gaining speed and we see >100MByte/sec=
=0A=
speed. Can anyone explain what might be going on.=0A=
=0A=
Best regards.=0A=
=0A=
Markus Stockhausen=0A=
=0A=
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