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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

負載平衡與服務品質要求之探討 / The Research of Load Balancing and Quality of Service:The Case of iPalace Channel

顏照銓, Yen, Chao Chuan Unknown Date (has links)
Video-on-demand streaming從90年代就在適當的科技下成為網際網路流量的龍頭,故宮教育頻道在技術上採用TCP-based video streaming,但Video streaming使得負載較一般的伺服器繁重。透過負載平衡來分散負載是可行的方式之一,但在TCP-based video streaming的技術下,還是可能遭遇服務品質之相關議題。而服務品質要求 (Quality of Service, QoS)是用來對使用者適配的服務品質表現,做具體之等級劃分的管理工具,本研究以故宮教育頻道 (iPalace Video Channel; iPalace)為標的,針對其DNS Load Balancing搭配Round Robin的運作背景,提出VM Side QoS及Client Side QoS,在VM Side設定Load rate作為指標、在Client Side則以撥放器的表現為主,設定Initial Buffering Time、Mean Rebuffering Duration以及Rebuffering Frequency共三個指標,並搭配流量的實驗操作,劃分Regular及Class情境來蒐集資料。 在分析後發現,在環境較為一致的Class情境中,Mean Rebuffering Duration與Load Rate及Rebuffering Frequency與Load Rate具有低度正相關。未來,若能在環境及客戶端的變異性有較多的控制及掌握,則可讓資料在蒐集上更為正確,讓後續的分析及探討與實際狀況更為相符。

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