Re: Can CEPH RBD devices be assigned to virtual machines in pre-allocation mode?

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> Am 22.10.2021 um 11:12 schrieb Tommy Sway <sz_cuitao@xxxxxxx>:
> 
> Even hypervisor support is useless if ceph itself does not support it.

Thick provisioning is supported from Octopus onwards. If you are using Qemu I can look into adding support for preprovisioning in the Qemu driver.

Peter


> 
> 
> 
> -----Original Message-----
> From: ceph-users-bounces@xxxxxxx <ceph-users-bounces@xxxxxxx> On Behalf Of Etienne Menguy
> Sent: Friday, October 22, 2021 3:55 PM
> To: ceph-users@xxxxxxx
> Subject:  Re: Can CEPH RBD devices be assigned to virtual machines in pre-allocation mode?
> 
> Hi,
> 
> You mean pre allocating space of an rbd image? As far as I know it’s not possible on ceph side.
> Maybe your hypervisor allows it.
> 
> -
> Etienne Menguy
> etienne.menguy@xxxxxxxx
> 
> 
> 
>> On 22 Oct 2021, at 03:58, tommy sway <sz_cuitao@xxxxxxx> wrote:
>> 
>> anyone can help me?
>> 
>> 
>> On 10/21/2021 16:39, Tommy Sway wrote:
>> Thanks.
>> 
>> 
>> 
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> 
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