1999 Fiscal Year Final Research Report Summary
Long-lived transaction model based on Agent Concept
| Project/Area Number |
09480074
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報システム学(含情報図書館学)
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
WATANABE Toyohide Nagoya University, Engineering, Inf. Engg., Prof., 工学研究科, 教授 (80093342)
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| Co-Investigator(Kenkyū-buntansha) |
ASAKURA Koichi Engineering, Inf. Engg., Research Asso., 工学研究科, 助手 (80273283)
SAGAWA Yuuji Engineering, Inf. Engg., Assist. Prof., 工学研究科, 講師 (90242833)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Transaction Processing / Agent / Long-lived transaction / Work-flow / Task-graph / Inceremental Processing / Interprocess Synchronization / Parallelizm |
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| Research Abstract |
Our objective in the research subject "Long-lived Transaction Model Based on Agent Concept" is to compose a model for making several related processings effectively executable under the concept of agent orientation. As for our objective, two different research views were investigated : 1) framework for making long-lived transaction effectively executable, and mechanism for making the execution performance of processing request sufficiently.
Concerning with the first research view, we proposed three layers model. In this model, the long-lived transaction is hierarchically composed so that the top layer is corresponded to the long-lived transaction layer, the middle layer is to the transaction layer and the bottom layer is to the action layer. However, the hierarchical model associates with the problem that the execution in the upper layer is too strongly dependent on that in the lower layer and also the execution efficiency is disturbed. In our approach, some autonomous agents with appro
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priate roles are allocated to individual layers : manager in the long-lived transaction layer ; executor in the transaction layer ; and actor in the action layer. Manager controls and manages the processing request, which is composed of several processing contents, indicated from users ; executors control and manage the corresponding processing contents, which are composed of atomic processing units, assigned from manager ; and actors execute practically the corresponding atomic processing unit. On the other hand, with respect to sufficient execution performance, the incremental parallel processing mechanism was investigated on the basis of read-write relationship between shared data. In addition, the synchronization problem to establish read-write relationship, and the access control problem to attain the fast data transfer between read-write processes were also investigated. The incremental parallel processing mechanism supports the fast processing efficiency between processes of write-read relationship in comparison with the conventional calling/called control structure. This incremental parallel processing mechanism was very useful for making the processing performance sufficient. Less
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