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

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and I am using Luminous





-----Original Message-----
From: ceph-users-bounces@xxxxxxx <ceph-users-bounces@xxxxxxx> On Behalf Of Tommy Sway
Sent: Friday, October 22, 2021 7:49 PM
To: 'Peter Lieven' <pl@xxxxxxx>
Cc: 'Etienne Menguy' <etienne.menguy@xxxxxxxx>; ceph-users@xxxxxxx
Subject:  Re: Can CEPH RBD devices be assigned to virtual machines in pre-allocation mode?

Yes, I am using qemu. And what I need to config to enable it ?



-----Original Message-----
From: Peter Lieven <pl@xxxxxxx> 
Sent: Friday, October 22, 2021 5:27 PM
To: Tommy Sway <sz_cuitao@xxxxxxx>
Cc: Etienne Menguy <etienne.menguy@xxxxxxxx>; ceph-users@xxxxxxx; Ilya Dryomov <idryomov@xxxxxxxxx>
Subject: Re:  Re: Can CEPH RBD devices be assigned to virtual machines in pre-allocation mode?



> 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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