Thursday, January 25 , 2007
A number of novel techniques underly split snapshots. A new in-memory data-structure creates consistent copy-on-write snapshots without blocking, a new persistent data structure provides high performance versioned meta-data, and a new snapshot storage organization allows to gradually garbage collect selected copy-on-write snapshots without copying and without creating disk-fragmentation. Measurements of a split snapshot prototype system indicate that the new techniques are efficient and scalable, imposing minimal 4% performance penalty on a storage system, on expected common workloads. (Joint work with Ross Shaull and Hao Xu)
Liuba Shrira is an associate Professor in the Computer Science Department at Brandeis University, and is affiliated with the Computer Science and Artificial Intelligence Laboratory at MIT. She received her PhD from Technion (Israel) what feels like yesterday, working with Nissim Francez, Michael Rodeh and Oded Goldreich on theoretical aspects of distributed algorithms. From 1986 to 1997 she was a researcher in the MIT Programming Methodology Group with Barbara Liskov. She joined Brandeis in 1997. In 2004-2005 she was a visiting researcher at Microsoft Research, Cambridge, UK.
Her research interests span aspects of design and implementation of distributed systems and especially storage systems. This includes fault-tolerance, availability and performance issues. Her recent focus is on long-lived transactional storage, time travel (in storage), software upgrades, byzantine faults, and support for collaborative access to long-lived objects.