On Tue, Nov 12, 2013 at 10:24 AM, Trivedi, Narendra <[email protected]> wrote: > Hi All, > > > > Could someone please explain the Cinder multi-backends feature (as of > Havana)? Specifically, I had the following questions: > > > > 1) Can I attach multiple physical storage backends (let’s say one all > SSD, another all SATA for instance) to a single host? > > 2) How does migration between different multiple backends work? Let’s > say the an SSD volume is attached to a VM I want to migrate all the data in > the SSD volume to a SATA volume without bringing down the interface. Do I > have to manually mount/un-mount the persistent volume to the instance- how > do paths are maintained? For instance, let’s say the persistent volume was > /dev/vdx mounted to /mnt/vol0 , how does it re-appear ? > > > > Thanks a lot in advance! > > Narendra > > > > > > > This message contains information which may be confidential and/or > privileged. Unless you are the intended recipient (or authorized to receive > for the intended recipient), you may not read, use, copy or disclose to > anyone the message or any information contained in the message. If you have > received the message in error, please advise the sender by reply e-mail and > delete the message and any attachment(s) thereto without retaining any > copies. > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >
Hi Narendra, Yes, the whole point is in fact that you can have multiple physical backends controlled by a single host. Of course it still needs to be a cinder supported backend/driver. To configure this you can check out the following link [1]. With respect to the migration, you should be able to run "migrate <volume-id> <host>", where host is the hostname of the backend you want to migrate too. John [1] https://wiki.openstack.org/wiki/Cinder-multi-backend _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
