Freshness-based edge-write architecture for data replication over the internet = 인터넷 상에서 효율적인 데이터 복제를 위한 에지-쓰기 아키텍처와 신선도 기반의 읽기 완화 기법

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We propose an Edge-write architecture which replicates and distributes data in the wide area network. Our system performs eager update propagation for update requests for the corresponding secondary server, whereas it lazily propagates updates from other secondary servers. Our architecture resolves consistency problems caused by read/update decoupling in the conventional lazy update propagationbased system. Although there is possibility for version difference to be occurred among several replicas, our concurrency mechanism easily detects such temporal inconsistency and keeps all replica nodes to be eventually consistent. Our system also improves overall scalability by alleviating the performance bottleneck at the primary server in compensation for increased but bounded response time. Such relaxed consistency management enables a read request to choose whether to read the replicated data immediately or to refresh it. We use the age of a local data copy as the freshness factor so that a secondary server can make a decision for freshness control independently. As a result, our freshness-controlled edge-write architecture benefits by adjusting a tradeoff between the response time and the correctness of data.
Advisors
Maeng, Seung-Ryoulresearcher맹승렬researcher
Description
한국과학기술원 : 전산학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
418680/325007  / 020005093
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전산학과, 2010.2, [ vii, 81 p. ]

Keywords

data replication; edge-write; internet; freshness; 신선도; 데이터 복제; 에지-쓰기; 인터넷

URI
http://hdl.handle.net/10203/33285
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=418680&flag=dissertation
Appears in Collection
CS-Theses_Ph.D.(박사논문)
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