hello, Could you kindly explain what's the meaning of CEPH_OSD_ALLOC_HINT_FLAG_IMMUTABLE flag? I think it means the corresponding object's data part(not include attrs) cannot be modified after the initial write. However, the object can be overwritten by write_full(). thx, Yang Honggang -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html