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Semantically-Smart Disk Systems

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Semantically-Smart Disk Systems
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 using 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 beneath a standard block read/write interface. To automatically acquire this knowledge, we introduce a tool (EOF) that can discover 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 construction by designing and implementing a number of prototypes as case studies; each case study exploits knowledge of some aspect of the file system to implement powerful functiona...
Muthian Sivathanu, Vijayan Prabhakaran, Florentina
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2003
Where FAST
Authors Muthian Sivathanu, Vijayan Prabhakaran, Florentina I. Popovici, Timothy E. Denehy, Andrea C. Arpaci-Dusseau, Remzi H. Arpaci-Dusseau
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