Thanks, First let's figure out the maximal allowed name size by oVirt.
Maybe you have some time and can get these information's?

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You can use your preferred search engine + read through the oVirt Documentation and oVirt SDK Documentation. Guessing is also a way but very imprecise because someone have coded the name limit anywhere. If its not documented anywhere It must be anywhere in the code, its also OpenSource.

UPDATE: Its also important to know if it is the snapshot-name-length or vm-name-length

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UPDATED
MaxVmNameLengthNonWindows - Max VM name length for non-Windows OS = 64
MaxVmNameLengthWindows - Max VM name length in Windows = 15

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Administration_Guide/Red_Hat_Enterprise_Virtualization_Manager_configuration_options_explanations_limitations_and_best_practices.html

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Hopefully its possible to get the type with the oVirt SDK.
I will code this tomorrow.

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If you dive deeply in code, let me know if exists posibility to set MaxVmNameLengthWindows longer then 16 in any cfg file without impacting current oVirt DB structure, pls.
UPDATE
https://access.redhat.com/solutions/643373

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SOLUTION
[root@ovirt backup]# engine-config --get=MaxVmNameLengthWindows --cver=general
15
[root@ovirt backup]# engine-config --set MaxVmNameLengthWindows=36 --cver=general
[root@ovirt backup]# engine-config --get=MaxVmNameLengthWindows --cver=general
36

Well , this is fixed now, but would you generate human number format suffix ( 1501212245 eg:? ), pls.,
regs. Pavel

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I added a separate config for this, your solution is good but its a workaround and didn't catch or solve the problem ;-). Besides its a little bit strange that for windows vm's only 15 characters are allowed.

For the suffix i will create a separate issue, for documentation purpose.

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Thank a lot for your solutions! It looks like OK!

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