# v0.63 05/12/2013 * Feature #2256: rbd: parallelize deletions * Feature #3064: librbd: A way to read from nearby replicas * Feature #3763: krbd: handle flattening of mapped image * Feature #3926: krbd: use slab allocation for common data structures * Subtask #5028: rbd: treat clones with zero parent overlap as non-layered * Bug #5146: krbd: wait for safe callback for writes