On 08/09/2018 03:01 PM, Piotr Dałek wrote: > This introduces one big issue: it enforces COW snapshot on image, > meaning that original image access latencies and consumed space > increases. "Lightweight" snapshots would remove these inefficiencies - > no COW performance and storage overhead.
Do you have any data about the COW costs ? Perhaps some graphs, metrics or benchmarks ? We are currently using rbd's snapshots for backup (using [1], #auto-advertisement) on some Luminous clusters, and have not found any impact, but perhaps we just "have too many hardware ressources / not enough images" for this to be perceptible [1] https://github.com/JackSlateur/backurne _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
