Difference between Template and Clone in oVirt

Hi Team, Could someone let me know the difference between creating VM from clone and template in oVirt? It really looks the same. Thanks, Hari -- DISCLAIMER - *MSysTechnologies LLC* This email message, contents and its attachments may contain confidential, proprietary or legally privileged information and is intended solely for the use of the individual or entity to whom it is actually intended. If you have erroneously received this message, please permanently delete it immediately and notify the sender. If you are not the intended recipient of the email message,you are notified strictly not to disseminate,distribute or copy this e-mail.E-mail transmission cannot be guaranteed to be secure or error-free as Information could be intercepted, corrupted, lost, destroyed, incomplete or contain viruses and MSysTechnologies LLC accepts no liability for the contents and integrity of this mail or for any damage caused by the limitations of the e-mail transmission.

19.11.2018 14:36, Hari Prasanth Loganathan пишет:
Hi Team,
Could someone let me know the difference between creating VM from clone and template in oVirt? It really looks the same.
I think you can create a "clone based on template" (independent from template) or "thin machine" (dependent from template. if template breaks machine also breaks) ? How to "creating VM from clone" ? I'm also new to ovirt and investigating it. By the way, ovirt/redhat docs says: ------------------- When you create a template, you specify the format of the disk to be raw or QCOW2: QCOW2 disks are thin provisioned. Raw disks on file storage are thin provisioned. Raw disks on block storage are preallocated. ------------------- I have a hyperconverged install with glusterfs file storage, and when I create template, it is have a "allocation policy = thin provision" automatically. But when I create new machine without template, I can create new disk image and select allocation policy - thin or preallocated. Are there a way to create preallocated VMs from template and file storage? I think they will be more reliable/safe and error-prone?
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vm1 was Cloned to vm2: If the source vm1 was deleted,vm2 still can be used.You can think they are independent. But if vm3 was created by template from vm4: We cannot be able to delete vm3,because vm4 is using the template.
participants (3)
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Hari Prasanth Loganathan
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max zhang
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Mike Lykov