On Thu, Nov 4, 2021 at 12:32 PM Benny Zlotnik <bzlot...@redhat.com> wrote:

>  yes, it should work, did you run into issues?
>
>
No, I was in doubt that it could be a serial task.

I can confirm the parallelism, as I tried with 2 VMS, both with 3 disks:
20Gb+20Gb+90Gb the first VM1 and 20Gb+20Gb+80Gb the second one VM2.
The source storage domain is based on iSCSI Equallogic with 10Gbit/s
connection.
The export domain is a vSphere VM (on 10Gb/s adapter) connected through the
ovirtmgmt channel (that is based on 10Gb/s adapters in LACP)

Going one by one I got
Starting export Vm VM1 to xfer 11/4/21 12:14:49 PM
Vm VM1 was exported successfully to xfer 11/4/21 12:21:54 PM
--> total 7' 5"

Starting export Vm VM2 to xfer 11/4/21 12:25:23 PM
Vm VM2 was exported successfully to xfer 11/4/21 12:32:19 PM
--> total 6' 56"

Going then in parallel (delay of 7 seconds, not using the method of
multi-select and export):
Starting export Vm VM1 to xfer 11/4/21 3:15:29 PM
Starting export Vm VM2 to xfer 11/4/21 3:15:36 PM
Vm VM2 was exported successfully to xfer 11/4/21 3:26:32 PM
Vm VM1 was exported successfully to xfer 11/4/21 3:26:46 PM

---> total 11' 17"

So I got about a 20% gain.
Next week I have to move some VMs with 900Gb of storage each, so I can get
optimizations going in parallel

Thanks,
Gianluca
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