Company Filing History:
Years Active: 2007-2016
Title: Keunjoo Kwon: Innovator in Database Systems
Introduction
Keunjoo Kwon is a notable inventor based in Seoul, South Korea. He has made significant contributions to the field of database systems, particularly in concurrency control mechanisms. With a total of two patents to his name, Kwon's work has had a substantial impact on how databases manage concurrent operations.
Latest Patents
Kwon's latest patents include a cache-conscious concurrency control scheme for database systems. This innovative scheme, known as the optimistic, latch-free index traversal ('OLFIT'), is designed for managing index structures in database systems. The OLFIT scheme maintains a latch, a version number, and a link to the next node at the same level of the index tree in each node of the index. The index traversal process involves consistent node read operations starting from the root. To ensure consistency without latching, every node update operation first obtains a latch and increments the version number after updating the node contents. Each node read operation begins by reading the version number into a register and ends with verifying if the current version number matches the register-stored version number. If they are consistent, the read operation is successful; otherwise, the read is retried until verification succeeds. This concurrency control scheme is applicable to various index structures, including the B+-tree and the CSB+-tree.
Career Highlights
Throughout his career, Kwon has worked with prominent companies such as SAP AG and SAP SE. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in database technology.
Collaborations
Kwon has collaborated with notable colleagues, including Sang Kyun Cha and Sangyong Hwang. These partnerships have fostered innovation and development in their respective fields.
Conclusion
Keunjoo Kwon's contributions to database systems through his innovative patents and collaborations highlight his importance as an inventor in the technology sector. His work continues to influence the way databases handle concurrency, ensuring efficiency and reliability in data management.