Intermittent snapshot method for data synchronization to cloud storage

Yuichi Yagawa*, Mitsuo Hayasaka, Nobuhiro Maki, Shin Tezuka, Tomohiro Murata

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We developed a configuration to place a cash storage called Cloud on-Ramp (CoR) with small capacity between client terminals at remote offices and a cloud storage connected by a wide area network. A CoR is placed in each remote office, and applications access them via a local area network, guaranteeing access performance. A CoR synchronizes the data with the cloud storage by copying updated data from the client terminal at regular intervals. It is necessary that a window to carry out the bulk-copy function be shortened and repeated many times to keep the latest data in the cloud storage. A method of maintaining consistency of data at a CoR is necessary, even if the data are updated in the copy by the client terminal. Therefore, we propose the "intermittent snapshot method", with which a snapshot is taken during bulk-copy execution and released as soon as the bulk copy is over. We evaluated the proposed method from the perspective of an implementation design. We formalized the method by using a stochastic Petri-net model and considered the proper size of the bulk-copy window that optimizes both the synchronization delay and application-access performance through simulation.

Original languageEnglish
Title of host publicationProceedings of the International MultiConference of Engineers and Computer Scientists 2018, IMECS 2018
EditorsDavid Dagan Feng, Craig Douglas, S. I. Ao, Korsunsky Korsunsky, Oscar Castillo
PublisherNewswood Limited
Number of pages6
ISBN (Electronic)9789881404787
Publication statusPublished - 2018
Event2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018 - Hong Kong, Hong Kong
Duration: 2018 Mar 142018 Mar 16

Publication series

NameLecture Notes in Engineering and Computer Science
ISSN (Print)2078-0958


Other2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018
Country/TerritoryHong Kong
CityHong Kong


  • Cloud Storage
  • Cloud on-Ramp (CoR)
  • Data Synchronization
  • Intermittent Snapshot
  • Stochastic Petri-net

ASJC Scopus subject areas

  • Computer Science (miscellaneous)


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