Abstract: A method and system allows a part of a database to be restored using a subset of the backup files stored for a database. A working copy of the data dictionary of the database, which stores data definitions, is restored using the latest backup file stored not later than the point in time specified and the names of tablespaces related to the table names specified are identified using the data dictionary. The files storing the database tablespaces specified and those identified as related are identified for restoration along with the point in time specified, so that the backup files may be used to restore the files to the latest time prior to the point in time specified. The database data files are [restored, they] are rolled forward from the point in time of the backup files to the point in time specified, using transaction logs restored with the database data files and the restored working data dictionary is updated as described by the transaction logs.

Abstract: A method and apparatus for managing access to resources is provided. When a process requires access to a resource, the process requests a lock on the resource from a lock manager unit that resides on the same node as the process. If a resource object for the resource does not exist, one is created in the lock manager unit, but not on lock manager units on other nodes. Because each lock manager unit does not have to store all resource objects, and resource objects are only created for resources that are actually used, the overhead of the lock management system is significantly reduced. Resources are grouped in recovery domains. When a lock manager unit that supported a recovery domain fails, the recovery domain is marked invalid. All resources in the recovery domain are considered invalid unless it would have been impossible for a failed instance to have held an exclusive lock on the resource. A snapshot of lock information is made before cleanup is performed on invalid resources.

Abstract: A waveguide gas laser having a ridged dielectric substrate to form a gas filled region in which an electric discharge generates a lasing mode. These ridged waveguide configurations may be utilized in either a rectangular or circular guide structure.

Abstract: Reduced breakage and reduced internal gas pressure is achieved in the trapped bubble process for the preparation of film by applying vacuum to the region of the tube where the bubble starts to form.

Abstract: Film is prepared by a trapped bubble process. The inflated tube of plastic material is subsequently further expanded by trapped internal gas to provide a bubble and orientation of the film. Irregularities in the film are randomized by cyclic rotation of the tube and bubble with a rotating means having a variable speed drive.