In my setup I have one Ceph cluster but 2 different pools, one for images which is on SATA disks and one for volumes which is on faster SAS disks. Given this setup I don’t imagine there is any way to thin provision an image to a volume? It would need to be a complete copy from one pool to another, yes?
I’m certainly not in a position to be able to contribute to a code change, I’m surprised this hasn’t been done already, it seems terribly inefficient to have to copy the images twice? Regards, Cory From: Avishay Traeger [mailto:avis...@stratoscale.com] Sent: Monday, 12 October 2015 9:55 PM To: Cory Hawkless <c...@hawkless.id.au> Cc: openstack@lists.openstack.org Subject: Re: [Openstack] Volume from image question The flow for all images for this process is to download from Glance to a temporary file, and then write to volume. This is not necessary for raw images, but that optimization has not been done. I did leave a comment about that in the code though 2.5 years ago, but never implemented it - you can give it a go if you'd like :-) Are you using two different Ceph clusters, one for images and one for volumes? Otherwise it should just be doing a thin provisioned clone of the image (no download, no temp space, no upload). On Mon, Oct 12, 2015 at 12:27 PM, Cory Hawkless <c...@hawkless.id.au<mailto:c...@hawkless.id.au>> wrote: Hi all, When creating a volume from an image(Using Horizon), why does the Cinder server need to do what appears to be a conversion of the image before it can create the volume? All of my images in Glance are uploaded in RAW format, images and volumes are stored in Ceph. The reason I know the images are being processed on my glance server is because it runs out of disk space when trying to make volumes from large images and the process fails. I can see the temporary file in /var/lib/cinder/conversion Is it not possible to have glance simply copy the image form the images store into the volumes store? I am going to regularly be creating new Windows Server instances, so it would take quite some time for a 20gb image to be processed by Cinder before it can be uploaded into Ceph. Regards, Cory _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org<mailto:openstack@lists.openstack.org> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack -- Avishay Traeger, PhD System Architect Mobile: +972 54 447 1475 E-mail: avis...@stratoscale.com<mailto:avis...@stratoscale.com> [http://www.stratoscale.com/wp-content/uploads/Logo-Signature-Stratoscale-230.jpg] Web<http://www.stratoscale.com/> | Blog<http://www.stratoscale.com/blog/> | Twitter<https://twitter.com/Stratoscale> | Google+<https://plus.google.com/u/1/b/108421603458396133912/108421603458396133912/posts> | Linkedin<https://www.linkedin.com/company/stratoscale>
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