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 ...

Turner College Grad Publishes Academic Study on Corporate Culture and Strategy

Former Turner College student Tamara Todorova , now an associate professor of economics at American University in Bulgaria (AUB), recently published a study on corporate culture and strategy. Todorova earned an MBA from the Turner College in 1996 and then went on to earn a doctorate in international economics from the University of Economics - Varna in 2001. She has been on the faculty at AUB since August of 2000. Todorova's study, which appears in the current issue of the International Journal of Business Performance Management , investigates how corporate culture helps to economize on the transaction costs of internal organization. As she explains, the dimensions of corporate culture that assist in this task include increasing trust and reducing intrafirm opportunism. Todorova's study demonstrates that setting common goals and a common direction reduces the sizeable costs of internal organization. Tamara's prior research appears in Economics of Transition , International ...

Hammer joins Turner College Finance Faculty

The Turner College's Department of Accounting and Finance welcomes Melissa Ingle Hammer , who joins the group as an adjunct faculty in finance. Hammer graduated from the Turner College in 2005, after earning a BBA in finance. She later went on to earn an MBA from Auburn University, a Specialist Certificate in Conduct Risk from the University of Manchester, a Certificate in Team Culture from the University of Pennsylvania, and a Certificate in Executive Presence from Cornell University. Hammer is the SVP of Fair Lending Product Management with RiskExec at Asurity. She previously worked as Compliance Manager of Fair Lending at Synovus, a senior regulatory consultant with Wolters Kluwer, and as VP of Compliance at TD. This semester Hammer will be teaching FINC 3135, Financial Institutions and Technologies. Turner Business welcomes Melissa and wishes her a great first semester in the Turner College.

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