Over the last year, QEMU's support for live block operations has grown to encompass atomic snapshots of multiple disks, merging of snapshots via block streaming and block commit, and block mirroring support.
While this talk is suitable for technical end-users, it deals with features that are primarily accessible by means of QAPI and QMP commands. It will focus on the snapshot and merging commands, how these operations are performed, and their limitations. Block mirroring will also be covered in similar detail. In addition, this talk will feature a demonstration of live atomic snapshots of multiple devices, and subsequent live merging of the resulting images by means of block commit and block streaming.