<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Hi Arman,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">VM's migration and disks migration are two different things:</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">- Live storage migration:</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">A VM's disk can be moved to another storage domain while the VM is running, by copying the disk's structure the destination domain.<br>The hard part of live storage migration is moving the active layer
volumes from one domain to another, while the VM is writing to those
volumes.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">By using a replication operation, the data is written to both source and destination volumes. <br>When both volumes contain the same
data, the block job operation can be aborted, pivoting to the new disk.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">You may find more detailed information here:
<a href="https://www.ovirt.org/develop/release-management/features/storage/live-storage-migration-between-mixed-domains/">https://www.ovirt.org/develop/release-management/features/storage/live-storage-migration-between-mixed-domains/</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">- Live migration:</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Provides the ability to move a running virtual machine between physical
hosts with no interruption to service.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">The virtual machine remains
powered on and user applications continue to run while the virtual
machine is relocated to a new physical host.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">A running virtual machine can be live migrated to any host within its
designated host cluster.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Live migration of virtual machines does not
cause any service interruption.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">You may find some more information here: <a href="https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.5/html/Administration_Guide/sect-Migrating_Virtual_Machines_Between_Hosts.html#What_is_live_migration">https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.5/html/Administration_Guide/sect-Migrating_Virtual_Machines_Between_Hosts.html#What_is_live_migration</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Hope it helps!<br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span style="font-family:tahoma,sans-serif"><b>Regards,<br></b></span></div><span style="font-family:tahoma,sans-serif"><b>Shani Leviim<br></b></span></div></div></div></div></div>
<br><div class="gmail_quote">On Fri, Nov 24, 2017 at 11:54 AM, Arman Khalatyan <span dir="ltr"><<a href="mailto:arm2arm@gmail.com" target="_blank">arm2arm@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">hi,<br>
I have some test enviroment with ovirt<br>
"4.2.0-0.0.master.<wbr>20171114071105.gitdfdc401.el7.<wbr>centos"<br>
2hosts+2NFS-domains<br>
<br>
During the multiple disk movement between the domains I am getting this warning:<br>
Moving disks while the VMs are running.(this is not so scary red as in<br>
4.1.x :) )<br>
<br>
What kind of problems can happen during the movement?<br>
<br>
Thanks,<br>
Arman.<br>
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</blockquote></div><br></div>