Hello,

in oVirt 4.3.10 an export job to export domain takes too long, probably due to the NFS server slow.

How can I stop in a clean way the task?

I see the exported file remains always at 4,5Gb of size.

Command vmstat on host with qemu-img process gives no throughput but blocked processes

procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 1  2      0 170208752 474412 16985752    0    0   719    72 2948 5677  0  0 96  4  0
 0  2      0 170207184 474412 16985780    0    0  3580    99 5043 6790  0  0 96  4  0
 0  2      0 170208800 474412 16985804    0    0  1379    41 2332 5527  0  0 96  4  0

and the generated file refreshes its timestamp but not the size

# ll -a  /rhev/data-center/mnt/172.16.1.137:_nas_EXPORT-DOMAIN/20433d5d-9d82-4079-9252-0e746ce54106/images/125ad0f8-2672-468f-86a0-115a7be287f0/
total 4675651
drwxr-xr-x.  2 vdsm kvm       1024 Jul  3 14:10 .
drwxr-xr-x. 12 vdsm kvm       1024 Jul  3 14:10 ..
-rw-rw----.  1 vdsm kvm 4787863552 Jul  3 14:33 bb94ae66-e574-432b-bf68-7497bb3ca9e6
-rw-r--r--.  1 vdsm kvm        268 Jul  3 14:10 bb94ae66-e574-432b-bf68-7497bb3ca9e6.meta

# du -sh  /rhev/data-center/mnt/172.16.1.137:_nas_EXPORT-DOMAIN/20433d5d-9d82-4079-9252-0e746ce54106/images/125ad0f8-2672-468f-86a0-115a7be287f0/
4.5G    /rhev/data-center/mnt/172.16.1.137:_nas_EXPORT-DOMAIN/20433d5d-9d82-4079-9252-0e746ce54106/images/125ad0f8-2672-468f-86a0-115a7be287f0/

The VM has two disks, 35Gb and 300GB, not full but quite occupied.

Can I simply kill the qemu-img processes on the chosen hypervisor (I suppose the SPM one)?

Any way to track down why it is so slow?

Thanks,

Gianluca