Dennis R Calkins

Title: Dennis R. Calkins: Inventor in Parallel Processing Systems.

Introduction

Dennis R. Calkins is an inventor associated with Carson, California, and NCR Corporation. His work includes inventions for fault recovery and file-system services in parallel-processing database environments. He holds 2 patents.

Latest Patents

Calkins’s listed patents address coordinated system recovery and efficient management of memory and disk operations.

- **Coordinated multinode dump collection in response to a fault.** This invention describes a parallel-processing system in which a fault on one node triggers coordinated dump capture across multiple nodes. After the system restarts, a master routine coordinates with routines on the other nodes, selects the needed diagnostic information, and gathers it for analysis.

- **File segment subsystem for a parallel processing database system.** This invention describes a subsystem for managing cache and secondary storage in a parallel database environment. Its functions include allocating and locking cache, managing memory with a buddy system, using hash-based aging queues to release cache, preloading data, and handling asynchronous I/O completion actions.

Career Highlights

At NCR Corporation, Calkins’s patented work focused on infrastructure for parallel-processing database systems. The inventions address both the collection of diagnostic data after faults and the management of memory and disk operations.

Collaborations

Calkins’s listed coworkers include Bruce J. Frost and Mark A. Geisert. Their names provide context for the professional network associated with his work.

Conclusion

Dennis R. Calkins’s patents reflect contributions to fault recovery and storage management in parallel-processing systems, with a focus on coordinating operations across nodes and supporting database performance.