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Controlling your PLACE in the File System with Gray-box Techniques
 

Summary: Controlling your PLACE in the File System
with Gray-box Techniques
James A. Nugent, Andrea C. Arpaci-Dusseau, and Remzi H. Arpaci-Dusseau
Computer Sciences Department
University of Wisconsin, Madison
Abstract
We present the design and implementation of PLACE, a
gray-box library for controlling file layout on top of FFS-
like file systems. PLACE exploits its knowledge of FFS
layout policies to let users place files and directories into
specific and localized portions of disk. Applications can
use PLACE to collocate files that exhibit temporal locality
of access, thus improving performance. Through a series
of microbenchmarks, we analyze the overheads of control-
ling file layout on top of the file system, showing that the
overheads are not prohibitive, and also discuss the limita-
tions of our approach. Finally, we demonstrate the utility
of PLACE through two case studies: we demonstrate the
potential of file layout rearrangement in a web-server en-
vironment, and we build a benchmarking tool that exploits

  

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

 

Collections: Computer Technologies and Information Sciences