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From Marcus <shadow...@gmail.com>
Subject Re: Uploading of Volume - how does what here ?
Date Thu, 26 Feb 2015 09:26:57 GMT
The volume is downloaded by the SSVM into secondary storage under the
volumes directory. It will sit there until you choose to attach it
somewhere, at which point a CopyCommand will be sent to a hypervisor
that has access to the primary storage for the cluster on which the
target VM is running to copy from secondary to primary. This will be
handled by the appropriate StorageAdaptor for the primary storage type
(most likely LibvirtStorageAdaptor, which will qemu-img it, converting
to RAW format for RBD/LVM, or just a plain cp last I checked for QCOW2
to QCOW2).Then an AttachCommand will be sent to the hypervisor on
which the target vm is running (if it is running) and it will be
hotplugged.

On Thu, Feb 26, 2015 at 1:05 AM, Andrija Panic <andrija.panic@gmail.com> wrote:
> Thx Lucian,
>
> that was my guessing, but would like some confirmation if anyone familiar
> with this...
>
> Thanks
>
> On 25 February 2015 at 17:57, Nux! <nux@li.nux.ro> wrote:
>
>> Not a CEPH user, but what I believe happens is your HV mounts the NFS
>> storage and then does something like "qemu-img convert" to move it into
>> CEPH.
>>
>> HTH
>> Lucian
>>
>> --
>> Sent from the Delta quadrant using Borg technology!
>>
>> Nux!
>> www.nux.ro
>>
>> ----- Original Message -----
>> > From: "Andrija Panic" <andrija.panic@gmail.com>
>> > To: dev@cloudstack.apache.org, users@cloudstack.apache.org
>> > Sent: Wednesday, 25 February, 2015 12:09:59
>> > Subject: Uploading of Volume - how does what here ?
>>
>> > Hi guys,
>> >
>> > I'm just uploading a Volume, and I guess it will end up on the CEPH
>> storage
>> > that we are using.
>> >
>> > So my qyestion would be: VOLUME will end up on the primary storage in the
>> > end, but right now, I can see that the SSVM is actuall y downloading the
>> > Volume from internet, and writing it to Secondary Storage at the moment.
>> >
>> > WHat happens next - I know that both SSVM and ofcoure my NFS server, can
>> > not write/talk at all to CEPH ?
>> >
>> > Does maybe some randomly choosen host, mounts Secondary Storage NFS, read
>> > Volume, and upload/write to CEPH ? (Since only hypervisor hosts can
>> > actually talk to CEPH)
>> >
>> > Thanks in advance for clarification...
>> >
>> > --
>> >
>> > Andrija Panić
>>
>
>
>
> --
>
> Andrija Panić

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