[ovirt-users] Re: How to reduce load during create VM

2021-04-26 Thread Nir Soffer
On Mon, Apr 26, 2021 at 12:36 PM  wrote:
>
> Hi, no, we don't use bit cloning via "clone" function, but we use templates 
> as a raw format template.
>
> When creating a VM through this template, the server load will increase a lot.
>
> We want to minimize this sharp increase during the establishment. We are 
> willing to wait longer to set up the server.

Try what Arik suggested:

Open VM > Resource Allocation tab
Set "Storage Allocation" to "Thin"

This will create create an empty qcow2 image using the template disk
as a backing file.
No data will be copied when creating the VM.

But note that this creates a dependency on the template. You will not
be able to move
the disk to another storage domain without copying the template to the
other storage
domain. This also creates a single point of failure - if the template
become corrupted all
the vm on top of it will break.

Nir
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[ovirt-users] Re: How to reduce load during create VM

2021-04-26 Thread ovirt . org
Hi, no, we don't use bit cloning via "clone" function, but we use templates as 
a raw format template.

When creating a VM through this template, the server load will increase a lot.

We want to minimize this sharp increase during the establishment. We are 
willing to wait longer to set up the server.
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[ovirt-users] Re: How to reduce load during create VM

2021-04-25 Thread Arik Hadas
On Wed, Apr 21, 2021 at 10:07 AM  wrote:

> Hi everyone, please, can you limit the "Create VM" process somewhere so
> that setting up quota does not load the server so much, especially storage
> when duplicating the template disk?
>

I assume you refer to the process (qemu-img) that clones the disks, right?
Did you consider changing the storage allocation to "thin" instead of
"clone"?


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