International Business Machines Corporation

Donald R Halley

Paul Douglas Koeller

Mark John Anderson

Kathryn Rose Steinbrink

Ritchie Lee Nyland

Leonard William Koser

Daniel L Amundson

Lynda Marie Smith

A method, apparatus, and program product restore database data having dependencies or ordering sensitivities, or that incorporates a database index. Unresolved dependencies are identified in response to an attempt to restore data in a computer. The data restoration is deferred and the data is cached when it has an unresolved dependency. After the dependency is resolved, the data restoration is completed. The unresolved dependency may be based-on data that must be restored or created prior to completing restoration. Deferred data is cached in memory and tracked in a deferred operation table. Data that is deferred may be accessed so long as operations that access the underlying based-on data are denied.

System restoration apparatus and method for management of dependencies, ordering sensitivities, and database index rebuilds

A method, apparatus and computer program product are provided for implementing enhanced autonomic data backup using multiple backup devices. A media definition object is defined for saving predefined user selections including a default backup format to be used, an order to process the libraries, a library exception size, and a maximum number of backup devices to be used serially. A list of libraries is generated by either a user specified order of the libraries or a size order of the libraries from largest to smallest. Each library in the generated list of libraries is processed to form at least one library queue of a serial device wait queue and a parallel device wait queue. A process IO procedure is called until backup completes for each library from the at least one library queue.

Method, apparatus and computer program product for implementing enhanced autonomic backup using multiple backup devices

A method, computer program product and apparatus are provided for data backup and recovery in a computer system. The data backup and recovery method uses a plurality of tape drives in parallel. A unique token is associated with each data object being saved to a tape media. While saving backup data to the plurality of tape drives, a dynamic load balancer dynamically balances the load between the plurality of tape drives. While recovering backup data from tape media, the unique token is utilized for processing tape media files in any order. Data segments of one or more objects are distributed across the parallel tape devices and are non-serial across the tape media files used. When recovering backup data from tape media, the same number or fewer tape drives than used during data saving can be used.

Method and apparatus for data backup and recovery

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Rochester, MN, United States of America

Donald R Halley