Abstract: The present disclosure provides a narrow-pulse-width pulse laser, including a circuit substrate, a laser chip, one or more capacitors, and a field effect transistor. Each of the field effect transistor, the capacitor, and the laser chip is electrically connected to the circuit substrate. The capacitors are arranged between the field effect transistor and the laser chip along an extension direction of a gap between the field effect transistor and the laser chip. The circuit substrate may include a first conductor layer; a second conductor layer; and an insulating layer arranged between the first conductor layer and the second conductor layer, wherein the first conductor layer and the second conductor layer are electrically connected through a via hole in the insulating layer.

Abstract: The present disclosure provides a narrow-pulse-width pulse laser, including a circuit substrate, a laser chip, one or more capacitors, and a field effect transistor. Each of the field effect transistor, the capacitor, and the laser chip is electrically connected to the circuit substrate. The capacitors are arranged between the field effect transistor and the laser chip along an extension direction of a gap between the field effect transistor and the laser chip. The circuit substrate may include a first conductor layer; a second conductor layer; and an insulating layer arranged between the first conductor layer and the second conductor layer, wherein the first conductor layer and the second conductor layer are electrically connected through a via hole in the insulating layer.

Abstract: A method and mechanism for performing data backups in a computing system. A “delta” catalog is utilized for the maintenance of data backups. The delta catalog includes a backed up object table and an extent map. For a given backup, the backed up object table update stores entries which identify only those objects backed up during that backup. The backed up object table is further configured to store entries which identify objects which were deleted between the time of a prior backup procedure and a current backup procedure. The extent map is configured identify all objects present in the system at the time of a particular backup. The extent map identifies the objects which were present as one or more sequences of entries in the backed up object table.

Abstract: One or more computer systems, a carrier medium, and a method are provided for creating a catalog for backup data using NDMP file history messages. The messages are received at a first computer system (NDMP client) from a second computer system (NDMP host). Each message comprises information describing a filesystem node (a file or directory). The messages comprise hierarchy information and attribute information for the nodes. For each message comprising hierarchy information, an entry may be created for the respective node in a catalog, and the hierarchy information for the respective node may be stored in the catalog. For each message comprising attribute information, the attribute information for the respective node may be stored in the catalog. The messages may be processed in a single pass without caching them all. A carrier medium may include program instructions which, when executed, cause the above operations on one or more computer systems.

Abstract: One or more computer systems, a carrier medium, and a method are provided for creating a catalog for backup data using NDMP file history messages. The messages are received at a first computer system (NDMP client) from a second computer system (NDMP host). Each message comprises information describing a filesystem node (a file or directory). The messages comprise hierarchy information and attribute information for the nodes. For each message comprising hierarchy information, an entry may be created for the respective node in a catalog, and the hierarchy information for the respective node may be stored in the catalog. For each message comprising attribute information, the attribute information for the respective node may be stored in the catalog. The messages may be processed in a single pass without caching them all. A carrier medium may include program instructions which, when executed, cause the above operations on one or more computer systems.