Re: [openstack-dev] [Ceph] Is it necessary to flatten Copy-on-write cloning for RBD-backed disks?

Hi Kun, On 09 Jun 2015, at 05:34, Kun Feng fengku...@gmail.com wrote: Hi all, I'm using ceph as storage backend for Nova and Glance, and merged the rbd-ephemeral-clone patch into Nova. As VM disks are Copy-on-write clones of a image, I have some concerns about this: 1. Since

[openstack-dev] [Ceph] Is it necessary to flatten Copy-on-write cloning for RBD-backed disks?

Hi all, I'm using ceph as storage backend for Nova and Glance, and merged the rbd-ephemeral-clone patch into Nova. As VM disks are Copy-on-write clones of a image, I have some concerns about this: 1. Since hundreds of vm disks based on one base file, is there any performance problems that IOs

Re: [openstack-dev] [Ceph] Is it necessary to flatten Copy-on-write cloning for RBD-backed disks?

Excerpts from Kun Feng's message of 2015-06-08 20:34:51 -0700: Hi all, I'm using ceph as storage backend for Nova and Glance, and merged the rbd-ephemeral-clone patch into Nova. As VM disks are Copy-on-write clones of a image, I have some concerns about this: 1. Since hundreds of vm disks