Award Abstract # 0204358
Applications of Data Grouping for Effective Mobility

NSF Org: CNS
Division Of Computer and Network Systems
Recipient: UNIVERSITY OF CALIFORNIA SANTA CRUZ
Initial Amendment Date: April 8, 2002
Latest Amendment Date: May 1, 2007
Award Number: 0204358
Award Instrument: Continuing Grant
Program Manager: Xiuzhen Cheng
CNS  Division Of Computer and Network Systems
CSE  Directorate for Computer and Information Science and Engineering
Start Date: July 1, 2002
End Date: June 30, 2008 (Estimated)
Total Intended Award Amount: $0.00
Total Awarded Amount to Date: $300,000.00
Funds Obligated to Date: FY 2002 = $83,654.00
FY 2003 = $81,429.00
FY 2004 = $84,917.00
FY 2005 = $50,000.00
History of Investigator:
  • Darrell Long (Principal Investigator)
     darrell@cs.ucsc.edu
Recipient Sponsored Research Office: University of California-Santa Cruz
 1156 HIGH ST
 SANTA CRUZ
 CA  US  95064-1077
(831)459-5278
Sponsor Congressional District: 19
Primary Place of Performance: University of California-Santa Cruz
 1156 HIGH ST
 SANTA CRUZ
 CA  US  95064-1077
Primary Place of Performance
Congressional District:		 19
Unique Entity Identifier (UEI): VXUFPE4MCZH5
Parent UEI:
NSF Program(s): DISTRIBUTED SYSTEMS,
CSR-Computer Systems Research
Primary Program Source: app-0102 
app-0103 
app-0104 
app-0105 
Program Reference Code(s): HPCC, 9218, 9199
Program Element Code(s): 287600, 735400
Award Agency Code: 4900
Fund Agency Code: 4900
Assistance Listing Number(s): 47.070

ABSTRACT

Applications of Data Grouping for Effective Mobility
Darrell D. E. Long

The problem of reducing a mobile computer's communication and power
requirements will be investigated. Specifically, this research will address
both issues through improved storage management. Based on successes with
automated data grouping and predictive power conservation, research will be
conducted into improved data hoarding and disk power management techniques.
Effective grouping of data will make it possible to improve the automation
of mobile file hoarding, and decrease the effects of network latency and
disconnections on the mobile user. Similarly, through the grouping and
retrieval of related on-disk data, it is possible to improve disk power
management beyond the theoretical limits of any previously attempted scheme.
This will be done by actively modifying the access sequence to minimize
power requirements. Through transformation of data access workloads, this
novel approach reshapes disk idle times to effectively increase the amount
of time a disk can be spun down. Improving the battery life of mobile
computing devices is critical to their usefulness, and such power efficiency
is clearly an environmentally responsible goal. This research will establish
the effectiveness of on-line data grouping techniques to increase the amount
of data accessed per operation, while simultaneously reducing the total
number of disk operations.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Gary A. S. Whittle, Jehan-Francois Paris, Ahmed Amer, Darrell D. E. Long and Randal Burns "Using Multiple Predictors to Improve the Accuracy of File Access Predictions" Proceedings of the Twentieth IEEE Symposium on Mass Storage Systems , 2003
Jeffrey P. Rybczynski, Darrell D. E. Long and Ahmed Amer "Adapting Predictions and Workloads for Power Management" Proceedings of the Fourteenth International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems , 2006
Jeffrey P. Rybczynski, Darrell D. E. Long and Ahmed Amer "Expecting the Unexpected: Adaptation for Predictive Energy Conservation" International Workshop on Storage Security and Survivability (StorageSS'05) , 2005
Jehan-Francois Paris, Ahmed Amer and Darrell D. E. Long "A Stochastic Approach to File Access Prediction" Proceedings of the International Workshop on Storage Network Architecture and Parallel I/O (SNAPI) , 2003
Jehan-Francois Paris, Thomas J. Schwarz, S.J. and Darrell D. E. Long "Protecting Data Against Early Disk Failures" Proceedings of the Fifth International Information and Telecommunication Technologies Symposium , 2006
Jehan-Francois Paris, Thomas J. Schwarz, S.J. and Darrell D. E. Long "Self-Adaptive Disk Arrays" Proceedings of the Eighth International Symposium on Stabilization, Safety, and Security of Distributed Systems , 2006
Jehan-Francois Paris, Thomas J. Schwarz, S.J. and Darrell D. E. Long "Self-Adaptive Two-Dimensional RAID Arrays" Proceedings of the International Performance Conference on Computers and Communication , 2007
Karl Brandt, Darrell D. E. Long and Ahmed Amer. "Predicting When Not To Predict" Twelfth International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) , 2004 , p.419
Timothy Bisson, Scott A. Brandt and Darrell D. E. Long "A Hybrid Disk-Aware Spin-Down Algorithm with I/O Subsystem Support" Proceedings of the International Performance Conference on Computers and Communication , 2007
Timothy Bisson, Scott A. Brandt and Darrell D. E. Long "NVCache: Increasing the Effectiveness of Disk Spindown Algorithms with Caching" Proceedings of the Fourteenth International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems , 2006

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