Distinguished Lecture Series
University of Lugano (USI), Schweiz
4. November 2015, 16:15 Uhr
S3|20, Raum 111, Rundeturmstr. 10, 64283 Darmstadt
Geo-replicated storage with scalable deferred update replication
Many current online services are deployed over geographically distributed sites (i.e., datacenters). Such services call for geo-replicated storage, that is, storage distributed and replicated among many sites. Geographical distribution and replication can improve locality and availability of a service. Locality is achieved by moving data closer to the users. High availability is attained by replicating data in multiple servers and sites. In this talk I will consider a class of highly available storage systems based on deferred update replication. Deferred update replication ensures strong consistency and is at the core of several highly available storage systems. I will first show how the performance of deferred update replication can be made to scale to dozens and potentially hundreds of nodes. I will then consider the implications of the approach on user-perceived latency in geographically distributed environments and propose solutions.
Fernando Pedone is a full professor at the Faculty of Informatics at the University of Lugano (USI), Switzerland, and one of the faculty’s “founding members”. He received the Ph.D. degree from Ecole Polytechnique F ́ederale de Lausanne (EPFL) in 1999 and has been previously affiliated with Cornell University, USA, as a visiting professor, and Hewlett-Packard Laboratories (HP Labs), USA, as a researcher. Fernando Pedone’s research interests include the theory and practice of dependable distributed systems and dependable data management systems. He has authored more than 100 scientific papers and 6 patents. He co-chaired the Monte Verita seminar “A 30-year perspective on replication”, which resulted in the book “Replication: theory and practice”, Springer 2010.