Education
Ph.D. (2015. 2 ~ 2021. 2) @ POSTECH, South Korea, Dept. of IT Convergence Engineering
B.S. (2011. 2 ~ 2015. 2) @ POSTECH, South Korea, Dept. of Electronic and Electrical Engineering (Summa Cum Laude)
Industry Experience
Intern (2015. 6 ~ 2015. 9) @ Oracle Labs, CA, USA
Participated in Parallel Graph AnalytiX (PGX) project: (1) Performance analysis and optimization of graph analytics queries for large-scale machines (X5-2, T5-8, and M7-8), (2) Efficient retrieval of subgraphs from databases
Intern (2016. 6 ~ 2016. 9) @ AT&T Labs, NJ, USA
Worked on Data Feed Management System (DFMS): (1) Formal modeling of DFMS (e.g., Apache Kafka, Rabbit MQ, and Bistro in AT&T), (2) Performance modeling and development of performance simulator
Publications
Ko, S., Lee, T., Hong, K., Lee, W., Seo, I., Seo, J., and Han, W., "iTurboGraph: Scaling and Automating Incremental Graph Analytics," In Proc. 47th Int'l conf. on Management of Data, ACM SIGMOD, Virtual Event, June 2021.
Lee, J., Lee, H., Ko, S., Kim, K., Andrei, M., Keller, F., and Han, W., "Asymmetric-Partition Replication for Highly Scalable Distributed Transaction Processing in Practice," In 46th Int'l Conf. on Very Large Data Bases (VLDB) / Proc. the VLDB Endowment (PVLDB), Vol. 13, No. 12, August 2020.
Park, Y., Ko, S., Bhowmick, S., Kim, K., Hong, K., Han, W., "G-CARE: A Framework for Performance Benchmarking of Cardinality Estimation Techniques for Subgraph Matching," In Proc. 46th Int'l conf. on Management of Data, ACM SIGMOD, Portland, USA, June 2020.
Ko, S. and Han, W., "TurboGraph++: A Scalable and Fast Graph Analytics System," In Proc. 44th Int'l conf. on Management of Data, ACM SIGMOD, Huston, USA, June 2018.
Lee, J., Shin, H., Park, C., Ko, S., Chun, Y., Noh, J., Stephan, W., and Han, W., "Hybrid Garbage Collection for Multi-Version Concurrency Control in SAP HANA," In Proc. 42nd Int'l conf. on Management of Data, ACM SIGMOD, San Francisco, USA, June 2016.
Kim, H., Lee, J., Bhowmick, S., Han, W., Lee, J., Ko, S., and Jarrah, M., "DualSim: Parallel Subgraph Enumeration in a Massive Graph on a Single Machine," In Proc. 42nd Int'l conf. on Management of Data, ACM SIGMOD, San Francisco, USA, June 2016.
Areas of Interest
Distributed Systems
Cloud Efficiency
Data Analytics and Machine Learning Framework Systems
Databases and Transaction Processing
Patents
Lee, J., Park, C.G., Noh, J., Stephan, W., Shin, H. and Ko, S., SAP SE, 2019. Interval garbage collection for multi-version concurrency control in database systems. U.S. Patent 10,346,298.
Lee, J., Park, C.G., Noh, J., Chuh, Y., Shin, H. and Ko, S., SAP SE, 2018. Hybrid garbage collection for multi-version concurrency control in database systems. U.S. Patent 10,102,120.