题目： A Vertical-Horizontal Framework for Building Rack-Aware Regenerating Codes

主讲人：张志芳

时间：2023年3月3日10:00-11:00

地址：腾讯会议ID：772-212-245

摘要：Rack-aware regenerating codes (RRCs) achieve the optimal repair bandwidth for single node failures in the hierarchical data center where nodes are organized into racks and the intra-rack communication is cost-free. In this work, a vertical-horizontal framework is proposed for building RRCs from MDS array codes and regenerating codes (RCs). Particularly for RRCs with the minimum storage (i.e., MSRR codes), the framework is further improved to achieve lower sub-packetization. As a key for building MSRR codes, MSR codes (i.e., RCs with the minimum storage) with improved sub-packetization level are also developed. Applying the newly derived MSR codes into the vertical-horizontal framework, MSRR codes with an improved sub-packetization level are explicitly constructed, and those achieving the lowest sub-packetization by far are proved to exist over sufficiently large fields.

主讲人简介： 张志芳，现为中国科学院数学与系统科学研究院研究员。于2007年在中科院数学与系统科学研究院获得理学博士学位，专业为应用数学。2009年获得中科院卢嘉锡青年人才奖，2010年入选中科院数学与系统科学研究院“陈景润未来之星”人才计划。研究方向包括安全多方计算，密钥共享，分布式存储编码，和保密信息提取。

邀请人：胡思煌

审核人：魏普文