New Study by Zhou Addresses Garbage Collection Issues in NAND Flash-Based Solid State Devices

A new study by the TSYS School’s Yi Zhou and colleagues from both Jinan University (China) and Auburn University proposes a new scheme to boost the performance of NAND flash-based solid state devices. As they explain, garbage collection (GC) plays a pivotal role in the performance of 3D NAND flash memory, where “copy back,” which is an operation where data are read from one location and copied to another location, has been widely used to accelerate valid page migration during garbage collection. Unfortunately, copy back is constrained by a parity symmetry issue such that data read from an odd/even page must be written to an odd/even page. After migrating two odd/even consecutive pages, a free page between the two migrated pages will be wasted. These wasted pages noticeably lower free space on flash memory and cause extra garbage collections, thereby degrading solid state device performance. To address this problem, the study by Zhou and colleagues, which is set to appear in a forthcoming issue of ACM Transactions on Storage, proposes a page-state-aware cache scheme called PSA-Cache, which prevents page waste by breaking odd/even consecutive pages in subsequent garbage collections. The study quantitatively evaluates the performance of PSA-Cache in terms of the number of wasted pages, the number of garbage collections, and response time by comparing it to two state-of-art schemes, GCaR and TTflash. The experiments reveal that PSA-Cache outperforms the existing schemes. More specifically, PSA-Cache curtails the number of wasted pages that result from implementation of GCaR and TTflash by 25.7% and 62.1%, respectively. Moreover, PSA-Cache cuts back the number of garbage collection counts by as much as 78.7%, while it reduces the average write response time by up to 85.4%.

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Four Turner College Faculty Recognized for Outstanding Teaching

CSU Head Women's Soccer Coach Jay Entlich recently released a list of CSU faculty who have been chosen by a player as a member of the CSU faculty who has impacted the player in a positive way along their journey at CSU. Four Turner College faculty were included on the list, along with the player who nominated each. Management professor Phil Bryant was named by Sophia Leal , a freshman midfielder from Oxford, Georgia. Sophia attended Eastside High School and was a two-time all-region selection during her high school career. Through the first 10 games of 2024, she has scored one goal and recorded three assists. Next, management professor John Finley was named by Lizz Forshaw , a graduate student forward from Stockton, England. Lizz, who attended IMG Academy in south Florida, has scored four goals and recorded four assists this season. During her senior year in 2023, she scored three goals and recorded two assists. As a junior in 2022, Lizz scored three goals ...

Seven Turner College Management and Marketing Faculty Have Combined to Produce Eight A-Level Journal Publications Between 2021 and the Present

A number of faculty in the Turner College's Department of Management and Marketing, which includes faculty in management information systems, have produced A-level journal publications in the last few years. This report covers that activity, starting with John Finley , the chairperson of the department. Professor Finley published a paper in the Journal of Computer Information Systems in 2022. Finley is joined by Kirk Heriot , the Crowley Distinguished Chair in Entrepreneurship. Heriot, who earned a PhD in management from Clemson University, published in a 2021 issue of Small Business Economics . One of the study's co-authors, Andres Jauregui of Fresno State University, was previously a member of the Turner College's economics faculty. Next is Johnny Ho , a professor of management, who has a 2022 publication in the Journal of Computer Information Systems . Ho has won CSU's Excellence in Research Award on multiple occasions, while he has compiled 2...

TSYS School, Jianhua Yang, Lixin Wang Each among Top Five in the World

New research by computer scientists in the School of Information Technology at Universiti Utara Malaysia that ranks institutions and individuals on the basis of scholarship in the area of stepping-stone attacks heaps praise on the Turner College’s TSYS School of Computer Science and two of its faculty – Jianhua Yang and Lixin Wang . The article, published in the April 2023 issue of the International Journal of Research in Engineering and Science , provides a bibliometric analysis of both publication and citation data from 2000 to September of 2022 related to research on stepping-stone intrusion. Among several results, it reports that Columbus State University ranks second worldwide, trailing only the University of Houston, using total publications on the subject as the basis of comparison. A number of other U.S. institutions appear in the top 10, including third-ranked North Carolina State University, fourth-ranked University of Illinois, sixth-ranked Iowa State U...

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