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Semantically-Smart Disk Systems Muthian Sivathanu, Vijayan Prabhakaran, Florentina I. Popovici, Timothy E. Denehy,
 

Summary: Semantically-Smart Disk Systems
Muthian Sivathanu, Vijayan Prabhakaran, Florentina I. Popovici, Timothy E. Denehy,
Andrea C. Arpaci-Dusseau, and Remzi H. Arpaci-Dusseau
Computer Sciences Department
University of Wisconsin, Madison
Abstract
We propose and evaluate the concept of a semantically-smart
disk system (SDS). As opposed to a traditional "smart" disk, an
SDS has detailed knowledge of how the file system above is us-
ing the disk system, including information about the on-disk data
structures of the file system. An SDS exploits this knowledge to
transparently improve performance or enhance functionality be-
neath a standard block read/write interface. To automatically
acquire this knowledge, we introduce a tool (EOF) that can dis-
cover file-system structure for certain types of file systems, and
then show how an SDS can exploit this knowledge on-line to
understand file-system behavior. We quantify the space and time
overheads that are common in an SDS, showing that they are not
excessive. We then study the issues surrounding SDS construc-
tion by designing and implementing a number of prototypes as

  

Source: Arpaci-Dusseau, Remzi - Department of Computer Sciences, Department of Computer Sciences, University of Wisconsin at Madison
Liblit, Ben - Department of Computer Sciences, University of Wisconsin at Madison

 

Collections: Computer Technologies and Information Sciences