Ceph Block Device

    Ceph block devices are thin-provisioned, resizable and store data striped overmultiple OSDs in a Ceph cluster. Ceph block devices leverageRADOS capabilitiessuch as snapshotting, replication and consistency. Ceph’sRADOS Block Devices (RBD)interact with OSDs using kernel modules or the library.

    Note

    Ceph’s block devices deliver high performance with infinite scalability to, or to KVMs such as QEMU, andcloud-based computing systems like and CloudStack that rely onlibvirt and QEMU to integrate with Ceph block devices. You can use the same clusterto operate the , theCeph File System, and Ceph block devices simultaneously.

    To use Ceph Block Devices, you must have access to a runningCeph cluster.