Cloud on Rampにおけるクラウドストレージへの遠隔データ同期のための間欠スナップショット方式

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2019/06/01

タイトル(英語): Intermittent Snapshot Method for Remote Data Synchronization from Cloud on-Ramp to Cloud Storage

著者名: 矢川　雄一（（株）日立製作所 研究開発グループ），早坂　光雄（（株）日立製作所 研究開発グループ），牧　晋広（（株）日立製作所 研究開発グループ），手塚　伸（（株）日立製作所 研究開発グループ），村田　智洋（早稲田大学大学院 情報生産システム研究科）

著者名(英語): Yuichi Yagawa (Research & Development Group, Hitachi, Ltd.), Mitsuo Hayasaka (Research & Development Group, Hitachi, Ltd.), Nobuhiro Maki (Research & Development Group, Hitachi, Ltd.), Shin Tezuka (Research & Development Group, Hitachi, Ltd.), Tomohiro Mu

キーワード: クラウドストレージ，Cloud on-Ramp (CoR)，遠隔データ同期，間欠スナップショット方式，確率ペトリネット　　cloud storage，Cloud on-Ramp (CoR)，data synchronization，intermittent snapshot，stochastic petri-net

要約(英語): To avoid low data-access performance through wide area network (WAN) from clients at remote offices to a cloud storage at a data center, we proposed a cloud-storage cache, called “cloud on-ramp” (CoR). Because the CoR is located at the remote office and connected to the clients through local area network (LAN), it can improve access performance from applications. However, a bulk copy that synchronizes data from the CoR to the cloud storage causes performance overhead. Especially, the more periodical bulk copies occur, due to ensure that distributed users can share more fresh data through the cloud storage, the more snapshots need to be taken, which keep data consistency but cause performance degradation for the applications. To ensure that the applications have reliable access to data even in the case of the periodical bulk copies, we propose a snapshot method called “intermittent snapshot” and a remote data synchronization method based on it. Execution timing of both the bulk copy and the snapshot completely synchronize, and the snapshot terminates after the bulk copy completion during the remaining period of a periodical bulk copy window, in which the application access performance ensures. In addition, we evaluate the remote data synchronization based on the intermittent snapshot from the perspective of an implementation design. We formalize the method by utilizing a stochastic Petri-net model, and determine a proper size of bulk copy window that optimize both synchronization delay and application access performance through Petri-net simulation. We also evaluate its data access performance improvement in comparison with a conventional method and a limit performance of the method.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.139 No.6 （2019） 特集：ビジネスシステムイノベーション

本誌掲載ページ: 745-756 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/139/6/139_745/_article/-char/ja/