I submitted a request quite a while ago upon implementation of the driver to
utilize RBD Format 2 images (which permit the usage of copy-on-write
snapshots). It is on the roadmap to be implemented on improving Ceph
integration (as you'll find that Ceph support is broken when using anything
newer than the default libvirt-bin and qemu-kvm packages included with Ubuntu
12.04, even if using packages from the Ubuntu Cloud Archive).
http://dev.opennebula.org/issues/1796#change-4486
----- Original Message -----
From: "Igor Laskovy" <[email protected]>
To: "Kenneth" <[email protected]>
Cc: [email protected]
Sent: Tuesday, September 3, 2013 7:20:14 AM
Subject: Re: [one-users] Working with Ceph datastore - How to tell do linked
snapshot for new VM?
Thanks for reply!
> The allocation time will depend on how fast your ceph network is.
Actually, I asking about eliminate copy operation. In Ceph you can start images
form snapshots and if you boot 100 VMs from one Image you will basically using
only one large disk and 100 snapshots with data that will changed. This
behaviour can be expected in opennebula somehow?
On Tue, Sep 3, 2013 at 1:09 PM, Kenneth < [email protected] > wrote:
Are you cloning/uploading an existing image to open nebula?.
I'm using ceph datastore too. My kvm template image is a 21GB qcow2 (and raw)
image but only 1.5GB of space is taken up. (that is before uploading to
nebula).
Images that will be stored in ceph will be converted to RBD and when nebula
"sees" that a this disk is 21GB, it will be allocated. The allocation time will
depend on how fast your ceph network is.
And have you tried creating an empty datablock? Create an empty datablock in
the ceph datastore and then install linux on that datablock, the allocation of
an empty datablock is faster, though you'll need to install the OS afterwards.
On 09/03/2013 05:57 PM, Igor Laskovy wrote:
<blockquote>
Anybody? ;)
On Sat, Aug 31, 2013 at 5:27 PM, Igor Laskovy < [email protected] > wrote:
<blockquote>
Hello all!
When I create VMs from image which located on ceph datastore, OpenNebula do
full clone of that image - it takes precious time. Is it possible to tell do
something like just quick snapshot and than working with it with VM?
--
Igor Laskovy
facebook.com/igor.laskovy
studiogrizzly.com
--
Igor Laskovy
facebook.com/igor.laskovy
studiogrizzly.com
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</blockquote>
--
Thanks,
Kenneth
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--
Igor Laskovy
facebook.com/igor.laskovy
studiogrizzly.com
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