On Tue, Jun 30, 2015 at 9:07 PM, Michał Chybowski <michal.chybowski@xxxxxxxxxxxx> wrote: > Hi, > > Lately I've been working on XEN RBD SM and I'm using RBD's built-in snapshot > functionality. > > My system looks like this: > base image -> snapshot -> snaphot is used to create XEN VM's volumes -> > volume snapshots (via rbd snap..) -> another VMs -> etc. > > I'd like to be able to delete one of the volumes "in the chain" but without > cloning base image blocks that hadn't changed yet (I'm trying to save up > space) as it is done "by default" while flattening snapshots. > Is this possible and if it is, then how can I achieve this? If I understand well, It looks like you should implement this logic at upper layer like cloudstack? RBD itself won't provide with this > > Also, we wanted to tune a bit ceph images while they're being created and > we're unable to set any of the striping options succesfully - We're setting > variables with correct values (even copying those in documentation) and we > get errors from librbd during image creation or image mapping. > You can't map image with stripe* enabled, kernel rbd doesn't support this > I can post you our ceph.conf and CRUSH map if needed. > > -- > Regards > Michał Chybowski > Tiktalik.com > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Best Regards, Wheat _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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