Open Stack

Thanks Xin,i will try for a separate license for snapshot and see how it
goes.

Can you help me understand this better.

in my existing cinder volume which is a single server that act as iscsi
target , i use LVM in qcow2 disk format and it has thin provisioning and
snapshot capability.

With VNX as backend what format does it use.Can it create disks as qcow2
format and uses its capability rather than using VNX 's native thin
provisioning and snapshot feature.

Long back if i remember correctly with vmware vmdk on hp 3par array  there
was performance degradation with two layers of thing provisioning ie vmdk
thin provisioning over 3par thin provisioning.

Thanks for your help

On Sat, Nov 15, 2014 at 3:12 AM, yang, xing <xing.yang at emc.com> wrote:

>  Yes, VNX snapshot should work with thick LUN.
>
>
>
> Thanks,
>
> Xing
>
>
>
>
>
> *From:* mad Engineer [mailto:themadengin33r at gmail.com]
> *Sent:* Friday, November 14, 2014 4:31 PM
> *To:* yang, xing
> *Cc:* openstack at lists.openstack.org
> *Subject:* Re: [Openstack] cinder and EMC VNX storage
>
>
>
> Thank you Xing ,
>
> can snapshot work with thick LUN? can i just buy snapshot license and make
> it work
>
>
>
> Thanks
>
>
>
> On Sat, Nov 15, 2014 at 1:58 AM, yang, xing <xing.yang at emc.com> wrote:
>
> Hi,
>
>
>
> The document you referenced is for the VNX Direct Driver.  If you use the
> VNX Direct driver, you need the “thin provisioning license” to create thin
> LUNs.  If you are only creating thick LUNs, you can skip this license.  You
> need the VNX Snapshot license to create a snapshot in Cinder.
>
>
>
> I’m not sure why the licenses are not required when you are using VMWare
> cluster.  Maybe they are thick LUNs only and snapshots are snapview
> snapshots instead of VNX snapshots.
>
>
>
> You need to have cinder-volume running, either on a separate node or on
> the controller node in order to use a cinder driver.
>
>
>
> Thanks,
>
> Xing
>
>
>
>
>
>
>
> *From:* mad Engineer [mailto:themadengin33r at gmail.com]
> *Sent:* Friday, November 14, 2014 12:44 PM
> *To:* openstack at lists.openstack.org
> *Subject:* [Openstack] cinder and EMC VNX storage
>
>
>
> Hi all,
>
>         Currently i am using icehouse release with KVM compute nodes and a
> server with *cinder-volume* installed as my storage server,(it uses iscsi
> to export lvm disks to compute nodes.)
>
> Now i got a chance to TEST EMC storage ie EMC VNX for couple of days which
> is currently used by our vmware cluster .
>
>
>
> but as per icehouse documentation
>
>
>
> *You must activate VNX Snapshot and Thin Provisioning license for the
> array.*
>
>
>
> But i don't have separate license for this and i am sure vmware was using
> this array without any issue (not managed by openstack)
>
>
>
> 1.Do i really need this license to make it work with cinder (if i don't
> care about thin provisioning).
>
> 2.Isn't it possible to use qcow2 image format with EMC VNX and use its
> native snapshot feature?
>
> 3.Do i still need to keep a separate node with cinder-volume installed or
> can my controller node with cinder-api running can directly communicate?
>
>
>
>
>
> i am not aware whether there is any separate mailing list for cinder
>
>
>
>
>
> Thanks
>
>
>
>
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack/attachments/20141115/0b3a2eac/attachment.html>