报告题目：HandingData Skew in Parallel Joins in Shared-Nothing Systems

报 告 人：付田原

报告时间：2013年4月2日

报告地点：贵州大学北校区博学楼603室

报告内容摘要：

Parallel processing continues to be importantin large data warehouses.Data skew occurs naturally in many applications. Inthis paper, it proposes a new join geography called PRPD (Partial Redistribution& Partial Duplication) to improve the performance and scalability ofparallel joins in the presence of data skew in a shared-nothing system.

报告题目：Design of Flash-BasedDBMS:AnIn-PageLoggingApproach

报 告 人：李宏源

报告时间：2013年4月2日

报告地点：贵州大学北校区博学楼603室

报告内容摘要：

Differencebetween NOR-type and NAND-type flash memory. Anvantages flash over magneticdisk, overcome the limitationsof and exploit the advantages of flash memory, achieve the bestattainable performance while minimizing the changes, realize a leanrecovery  mechanism. In thispaper, takeadvantage of new features of flash memory such as uniformrandom access speed and asymmetric read/write speed,overcome the erase-before-write limitation of flash memory, minimize the changes made to the over allDBMS architectures.