[ovirt-users] Why so long to add virtual HDD?

[Maor Lipchuk]

Hi Alan,

Since your disks are configured as pre-allocation, vdsm use the dd command when creating them.
perhaps you could try to monitor the dd command to analyze the progress.
BTW, Is there any reason not to use thin provisioning?

Regards,
Maor


----- Original Message -----
> From: "Alan Murrell" <lists at murrell.ca>
> To: "users" <users at ovirt.org>
> Sent: Monday, May 18, 2015 9:31:31 AM
> Subject: [ovirt-users] Why so long to add virtual HDD?
> 
> Hello,
> 
> I am wondering why it takes so long to provision a HDD for a VM?  I
> typically do full provision (as opposed to "thin" provision) and while I
> have never sat there and timed it, it takes at least ten minutes to
> provision a 32GB HDD.  I provisioned a 100GB HDD earlier today and even
> after 45 minutes it was not complete.
> 
> I am from the VMware world where it takes less than a minute (usually
> more like 30 seconds or so) to provision a VM, regardless of HDD assigned.
> 
> My host's physical HDD's are 2x2TB SATA drives in a hardware RAID1.
> oVirt storage is an NFS pool connecting to my host machine (for all
> intents and purposes, local storage)
> 
> I wonder if I have things mis-configured? Is it normal for provisioning
> to take that long?
> 
> Thanks! :-)
> 
> -Alan
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