Recent Filesystem Optimisations in FreeBSD

Dowse, Ian and Malone, David (2002) Recent Filesystem Optimisations in FreeBSD. In: Proceedings of the USENIX annual technical conference 2002, June 10-15 2002, Monterey CA.

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In this paper we summarise four recent optimisations to the FFS implementation in FreeBSD: soft updates, dirpref, vmiodir and dirhash. We then give a detailed exposition of dirhash’s implementation. Finally we study these optimisations under a variety of benchmarks and look at their interactions. Under micro-benchmarks, combinations of these optimisations can offer improvements of over two orders of magnitude. Even real-world workloads see improvements by a factor of 2–10.

Item Type: Conference or Workshop Item (Paper)
Keywords: Filesystem Optimisations; FreeBSD; FFS implementation in FreeBSD; Soft Updates; Dirpref; Vmiodir; Dirhash.
Academic Unit: Faculty of Science and Engineering > Computer Science
Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID: 1502
Depositing User: Dr. David Malone
Date Deposited: 12 Aug 2009 11:23
Refereed: Yes

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