Douglas S. Santry Michael J. Feeley Norman C. Hutchinson Alistair C. Veitch Ross W. Carton Jacob Ofir Deciding when to forget in the Elephant file system. 110-123 1999 SOSP http://doi.acm.org/10.1145/319151.319159 db/conf/sosp/sosp99.html#SantryFHVCO99