An RBD image is comprised of individual backing objects, each object no more than 4MB in size (assuming the default RBD object size when the image was created). You can refer to this document [1] to get a better idea of how striping is used. Effectively, a standard RBD image has a stripe count of 1 and a stripe unit of the object size (4MB default).
[1] http://docs.ceph.com/docs/master/architecture/#data-striping On Mon, Sep 19, 2016 at 4:05 AM, xxhdx1985126 <xxhdx1985...@163.com> wrote: > Hi, everyone. > > On the "Block Storage" page, I found this: "Ceph RBD interfaces with the > same Ceph object storage system that provides the librados interface and the > Ceph FS file system, and it stores block device images as objects.". > Does it mean literally that a RBD image is implemented as an object not a > file on Ceph? If this is true, wouldn't it be a problem when creating a very > large image? > > Thank you:-) > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Jason _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
