Kaustubh R. Joshi Guy Bunker Farnam Jahanian Aad P. A. van Moorsel Joseph Weinman Dependability in the cloud: Challenges and opportunities. 103-104 2009 DSN http://doi.ieeecomputersociety.org/10.1109/DSN.2009.5270350 conf/dsn/2009 db/conf/dsn/dsn2009.html#JoshiBJMW09