
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Workload Characterization for Web Search
전명재,이영규 한국지식정보기술학회 2016 한국지식정보기술학회 논문지 Vol.11 No.4
Web search distributes query processing across many servers, and each web search server processes multiple queries concurrently to achieve high throughput. A fundamental requirement of web search is responsiveness, which is typically guided by a response time SLA. As this is applied to each and every search query, understanding how system resources are utilized during query execution is important. In this paper, we present workload characterization for web search, with a focus on temporal and spatial locality of index data access. A key finding includes high temporal locality, suggesting that data caching plays an important role in achieving good performance. Moreover, this paper analyzes how effective the preferching of index data is in web search. The prefetching is a very common optimization in web search in order to amortize delay related to data reads from external storage. From the analysis, we observe that the prefetching is not only frequent, but also aggressive, with large size of data to be issued for prefetching. Surprisingly, this optimization is effective in web search. However, some portion of the prefetched data is not accessed by the query due to early termination, and this paper shows that this accounts for 8.3% of total prefetched data. As a future work, we will study how to reconcile many prefetching requests issued by concurrent queries under heavy loads. Lastly, we believe that this work will fuel future endeavors on improving memory management for web search workloads.
Surgical decision making for symptomatic pelvic organ prolapse: evidence-based approach
전명재 대한산부인과학회 2019 Obstetrics & Gynecology Science Vol.62 No.5
Surgery is the mainstay of treatment for symptomatic pelvic organ prolapse (POP), and a variety of procedures can beperformed to correct POP. When deciding on the proper surgical procedure, the surgeon must take into considerationthe individual patient’s risk for surgical complication and prolapse recurrence and her preference. This review willdiscuss the key issues faced in the surgical decision-making process for POP and recommendations based on thecurrent scientific evidence.