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  1. Proceedings of the Sixth International Workshop on Data Management for Sensor Networks (DMSN '09)
  2. FSort: external sorting on flash-based sensor devices
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Swiss experiment: from wireless sensor networks to sensor data management
Plug&manage heterogeneous sensing devices
Quality aware query scheduling in wireless sensor networks
FSort: external sorting on flash-based sensor devices
ArchRock Energy Optimizer: a case study on IP WSN data for energy and environmental monitoring
Towards energy efficient XPath evaluation in wireless sensor networks
Validated cost models for sensor network queries
Developing and deploying sensor network applications with AnduIN
Extracting tennis statistics from wireless sensing environments
Class-based continuous query scheduling for data streams
Message models and aggregation in knowledge based middleware for rich sensor systems
Adaptive random sensor selection for field reconstruction in wireless sensor networks

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FSort: external sorting on flash-based sensor devices

Content Provider ACM Digital Library
Author Samaras, George Chrysanthis, Panos K. Zeinalipour-Yazti, Demetrios Andreou, Panayiotis Spanos, Orestis
Abstract In long-term deployments of Wireless Sensor Networks, it is often more efficient to store sensor readings locally at each device and transmit those readings to the user only when requested (i.e., in response to a user query). Many of the techniques that collect information from a sensor network require that the data is sorted on some attribute (e.g., range queries, top-k queries, join queries, etc.) Yet, the underlying storage medium of these devices (i.e., Flash media) presents some unique characteristics which renders traditional disk-based sorting algorithms inefficient in this context. In this paper we devise the FSort algorithm, an efficient external sorting algorithm for flash-based sensor devices with a small memory footprint. FSort minimizes the expensive write/delete operations of flash memory minimizing in that way the consumption of energy. In particular, FSort uses a top-down replacement selection algorithm in order to produce sorted runs on flash media in a log-based manner. Sorted runs are then recursively merged in order to yield the sorted result. Our experimentation with real traces from Intel Research Berkeley show that FSort greatly outperforms the traditional External Mergesort Algorithm both in regards to time and energy consumption. We found similar advantages in regards to the wearability constraints of flash media.
Starting Page 1
Ending Page 6
Page Count 6
File Format PDF
ISBN 9781605587776
DOI 10.1145/1594187.1594201
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2009-08-24
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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