> Hi all, > I am looking for a way to alleviate the overhead of RBD snapshots/clones for > some time. > > In our scenario there are a few “master” volumes that contain production > data, and are frequently snapshotted and cloned for dev/qa use. Those > snapshots/clones live for a few days to a few weeks before they get dropped, > and they sometimes grow very fast (databases, etc.). > > With the default 4MB object size there seems to be huge overhead involved > with this, could someone give me some hints on how to solve that? >
Do you have any statistics (or can you gather any statistics) that indicate the percentage of block-size, zeroed extents within the clone images' RADOS objects? If there is a large amount of waste, it might be possible / worthwhile to optimize how RBD handles copy-on-write operations against the clone. -- Jason Dillaman Red Hat dilla...@redhat.com http://www.redhat.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
