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Summary: Storage-Aware Caching:
Revisiting Caching for Heterogeneous Storage Systems
Brian C. Forney Andrea C. Arpaci-Dusseau Remzi H. Arpaci-Dusseau
Computer Sciences Department
University of Wisconsin, Madison
{bforney,dusseau,remzi}@cs.wisc.edu
Abstract
Modern storage environments are composed of a vari-
ety of devices with different performance characteris-
tics. In this paper, we explore storage-aware caching
algorithms, in which the file buffer replacement algo-
rithm explicitly accounts for differences in performance
across devices. We introduce a new family of storage-
aware caching algorithms that partition the cache, with
one partition per device. The algorithms set the parti-
tion sizes dynamically to balance work across the de-
vices. Through simulation, we show that our storage-
aware policies perform similarly to LANDLORD, a cost-
aware algorithm previously shown to perform well in
Web caching environments. We also demonstrate that
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