报告题目：CODD: A Dataless Approach to Big Data Testing

报 告 人：种冠鹏

报告时间：2016年04月06日 下午 2:30

报告地点：贵州大学北校区博学楼603室

报告内容摘要：    

Effective design and testing of database engines and applications is predicated on the ability to easily construct alternative scenarios with regard to the database contents. A limiting factor, however, is that the time and/or space overheads incurred in creating and maintaining these databases may render it infeasible to model the desired scenarios. In this paper, we present CODD, a lucid graphical tool that attempts to alleviate these difficulties through the construction of “dataless databases”.

报告题目：JetScope: Reliable and Interactive Analytics at Cloud Scale

报 告 人：郝诗佳

报告时间：2016年04月06日 下午 2:30

报告地点：贵州大学北校区博学楼603室

报告内容摘要：  

 The paper presents a cloud scale interactive query processing system, called JetScope, developed at Microsoft. The system has a SQL-like declarative scripting language and delivers massive scalability and high performance through advanced optimizations. In order to achieve low latency, the system leverages various access methods, optimizes delivering first rows, and maximizes network and scheduling efficiency. The system also provides a fine-grained fault tolerance mechanism which is able to efficiently detect and mitigate failures without significantly impacting the query latency and user experience. JetScope has been deployed to hundreds of servers in production at Microsoft, serving a few million queries every day.