Architectural considerations for next-generation file systems |
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Authors: | Prashant Shenoy Pawan Goyal Harrick M Vin |
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Affiliation: | (1) Department of Computer Science, University of Massachusetts, Amherst, MA 01003, USA e-mail: shenoy@cs.umass.edu , US;(2) Ensim Corporation, 1215 Terra Bella Ave, Mountain View, CA 94043, USA e-mail: goyal@ensim.com , US;(3) Department of Computer Sciences, University of Texas, Austin, TX 78712, USA e-mail: vin@cs.utexas.edu , US |
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Abstract: | Integration – supporting multiple application classes with heterogeneous performance requirements – is an emerging trend
in networks, file systems, and operating systems. We evaluate two architectural alternatives – partitioned and integrated
– for designing next-generation file systems. Whereas a partitioned server employs a separate file system for each application
class, an integrated file server multiplexes its resources among all application classes; we evaluate the performance of the
two architectures with respect to sharing of disk bandwidth among the application classes. We show that although the problem
of sharing disk bandwidth in integrated file systems is conceptually similar to that of sharing network link bandwidth in
integrated services networks, the arguments that demonstrate the superiority of integrated services networks over separate
networks are not applicable to file systems. Furthermore, we show that: an integrated server outperforms the partitioned server
in a large operating region and has slightly worse performance in the remaining region; the capacity of an integrated server
is larger than that of the partitioned server; and an integrated server outperforms the partitioned server by a factor of
up to 6 in the presence of bursty workloads. |
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Keywords: | : file systems – multimedia workloads – integrated systems – performance evaluation |
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