Title: Cloud Storage Systems: Latency, Reliability, and Cost

October 14, 2014
2:50 pm - 4:00 pm
Halligan 102
Speaker: Dr. Vaneet Aggarwal, AT&T Research


Consumers are engaged in more social networking and Ecommerce activities these days and are increasingly storing their documents and media in the online storage. Businesses are relying on Big Data analytics for business intelligence and are migrating their traditional IT infrastructure to the cloud. These trends cause the online data storage demand to rise faster than Moore's Law. Erasure coding techniques are used widely for distributed data storage since they provide space-optimal data redundancy to protect against data loss.

Cost-effective, network-accessible storage is a strategic infrastructural capability that can serve many businesses. These customers, however, have very diverse requirements of latency, reliability, cost, security etc. In this talk, I will describe how to characterize latency, reliability, cost, and the trade-offs involved in these. In order to characterize latency, we give and analyze a novel scheduling algorithm. I will describe that limited bandwidth between data centers allow us to design new coding schemes that help improve mean time to data loss of the system by 10^20 for (51,30) erasure code as compared to a standard Reed-Solomon code. Finally, I will focus on joint optimization of customer requirements, present new approaches for content placement and content access, and validate the results using implementations on an open source distributed file system on a public test grid.

Bio: Vaneet Aggarwal received the B.Tech. degree from the Indian Institute of Technology Kanpur, Kanpur, India, in 2005 and the M.A. and Ph.D. degrees from Princeton University, Princeton, NJ, USA, in 2007 and 2010, respectively, all in electrical engineering. He is currently a Senior Member of the Technical Staff - Research with AT&T Labs Research, Bedminster, NJ, USA, and an Adjunct Assistant Professor with Columbia University, New York, NY, USA. His research interests are in the applications of statistical, algebraic and optimization techniques to wireless systems and distributed storage systems. Dr. Aggarwal received the Princeton University's Porter Ogden Jacobus Honorific Fellowship in 2009, and AT&T Vice President Excellence Award in 2013.