cloudstack-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Andrija Panic <andrija.pa...@gmail.com>
Subject Re: Uploading of Volume - how does what here ?
Date Thu, 26 Feb 2015 09:31:12 GMT
Now you see, that is 5 star answer :)

Thank you very much Marcus

@Nux, will confirm what Marcus said, as you proposed with top and ther
stuff - I just wanted confirmation/info, that I got from Marcus.

On 26 February 2015 at 10:26, Marcus <shadowsor@gmail.com> wrote:

> 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
>



-- 

Andrija Panić

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message