Abstract: A method, a device and a system for asynchronous directory replication is disclosed. The method comprises: configuring an inode identifier of an object stored in a source NAS, the inode identifier of the object having a first inode space identifier and a first local inode identifier, wherein the first inode space identifier indicates that the object is created by the source NAS; copying the object to a target NAS to be stored as a target object, wherein an inode identifier of the target object having a second inode space identifier and a second local inode identifier, wherein the second inode space identifier indicates that the target object is received from the source NAS, and wherein the second local inode identifier is identical to the first local inode identifier, and creating a mapping between the first inode space identifier and the second inode space identifier.

Abstract: Disclosed is a method and apparatus of monitoring and controlling the degree of fusion of a coating applied to a substrate. Fusion is determined by the measured optical distortions of laser beam reflected from the surface of the coated substrate. Optical distortion may be measured in the form of wavefront or intensity distortions. Typically, poor fusion is associated with greater distortion values.