Paper Info
Title
Towards higher disk head utilization: extracting free bandwidth from busy disk drives
Abstract
Freeblock scheduling is a new approach to utilizing more of a disk's potential media bandwidth. By filling rotational latency periods with useful media transfers, 20-50% of a never-idle disk's bandwidth can often be provided to background applications with no effect on foreground response times. This paper describes freeblock scheduling and demonstrates its value with simulation studies of two concrete applications: segment cleaning and data mining. Free segment cleaning often allows an LFS file system to maintain its ideal write performance when cleaning overheads would otherwise reduce performance by up to a factor of three. Free data mining can achieve over 47 full disk scans per day on an active transaction processing system, with no effect on its disk performance.
Year
Venue
Keywords
2000
OSDI
full disk,data mining,segment cleaning,free bandwidth,towards higher disk head,disk performance,free data mining,lfs file system,never-idle disk,busy disk drive,freeblock scheduling,active transaction processing system,free segment,computer files,mass storage,optimization,computer storage devices,information retrieval,data management,systems analysis,computer architecture
Field
DocType
Citations 
Disk buffer,Computer science,Hard disk drive performance characteristics,Disk encryption hardware,Logical disk,Real-time computing,Disk mirroring,Data recovery,Computer hardware,Disk array controller,Disk sector
Conference
65
PageRank 
References 
Authors
4.85
40
5
Name
Order
Citations
PageRank
Christopher R. Lumb132821.27
Jiri Schindler241126.82
Gregory R. Ganger34560383.16
David F. Nagle4623102.85
Erik Riedel51037142.99