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Published Articles >> Table of Contents >> Abstract
2002 Pacific Rim International Symposium on Dependable Computing (PRDC'02)
p. 257
Providing Persistence or Sensor Streams with Light Neighbor WAL
Hideyuki Kawashima, Keio University
Motomichi Toyama, Keio University
Yuichiro Anzai, Keio University
Michita Imai, Keio University
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/PRDC.2002.1185645
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| Abstract |
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Sensor database systems need to provide both freshness of data and persistence to the incoming sensor streams.To provide persistence,a disk based logging method has been widely used,however it is not applicable for sensor streams because of its tardiness.In this paper,we ropose the Light Neighbor Write Ahead Logging protocol(L-WAL)for sensor streams.The L-WAL is a refinement of the Neighbor- WAL(N-WAL).The L-WAL needs two network interfaces and applies relaxed protocol than two phase commit protocol.Since the relaxed protocol weakens the guarantee of logging successes,we have incorporated repair system and checker system to enhance the guarantee.The result of experiments shows that the L-WAL is about 2.13 times faster than the N-WAL when the number of concurrent sensor streams is 250 and the L-WAL can enhance the persistence of data almost for free,while the N-WAL needs to pay high cost.
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Citation:
Hideyuki Kawashima, Motomichi Toyama, Yuichiro Anzai, Michita Imai,
"Providing Persistence or Sensor Streams with Light Neighbor WAL,"
prdc,
p. 257,
2002 Pacific Rim International Symposium on Dependable Computing (PRDC'02),
2002
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