Cumulus: Filesystem Backup to the Cloud

Michael Vrable, Stefan Savage and Geoffrey M. Voelker
CS2008-0927
July 31, 2008

In this paper we describe Cumulus, a system for efficiently implementing filesystem system backups over the Internet. Cumulus is specifically designed under a thin cloud assumption--that the remote datacenter storing the backups does not provide any special backup services, but only provides a least-common-denominator storage interface (i.e., get and put of complete files). While Cumulus can thus use virtually any storage service, we show that it still provides efficiencies comparable to integrated approaches.


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