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Distributed Information System: Challenges and Design Issues

Distributed Information System: Challenges and Design Issues. Question II Web Desktop 報告人：陳鈞興 2008/04/03. Question 2. Computational load in the client-server model has been shifted back and forth between servers and clients.

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Distributed Information System: Challenges and Design Issues

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  1. Distributed Information System: Challenges and Design Issues Question II Web Desktop 報告人：陳鈞興 2008/04/03

  2. Question 2 • Computational load in the client-server model has been shifted back and forth between servers and clients. • In the mainframe age, computation is done mainly in the server side. • Then, it shifts to the client side to ease the server load. • Now there is an increasing trend to put computation back to the servers by running applications from the servers. Google in fact has developed several web-based application. • One thing related to this trend is “Web Desktop” • a virtual desktop that integrates web-based applications from different vendors into your desktop. • Products like Desktop Two, YouOS are some leading examples. Google’s i-Google can also be classified into the category. • Give a short introduction of web desktops and and outlook of them

  3. 集中分散  集中 Mainframe Client-Server Webtop

  4. Web Desktop – From Wikipedia, the free encyclopedia • A web desktop or webtop is a network application system for integrating web applications into a web-based workspace. • It is a virtual desktop on the web, running in a web browser as software. • Web desktops often are characterized by an environment similar to that of Windows, Mac, or Linux, but are now considered to have much more functionality being dependent on the internet. • Typical benefits include the ability to save work and settings over the internet rather than to the local desktop.

  5. Web Desktop • Webtop最早由Santa Cruz Operation (SCO) 於1993 在SCO UNIX的web-based 界面 • Andy Bovingdon and Ronald Joe Record, who both explored the concepts in different directions, are often credited as the inventors.

  6. Webtop vs.desktop • 優點 • 方便：只要有簡單的瀏覽器就可以 • 簡單軟體管理： • 都是用最新的軟體 • 不需要安裝/更新patch • 不需要安裝軟體(no need to distribute software over the network) • 其他優點 • 最小的硬體需求 • 高的安全等級(如果使用https) • 較少的downtime (管一個系統比20個系統容易)

  7. Webtop vs.desktop • 缺點 • 安全性：所有的資料都是在internet上傳輸，容易遭到駭客攻擊 • 需要高速的internet：使用web-based desktop，所有的code及視覺化的(.js/.css files, Flash player files等等)需要被傳輸到local • Web OS可能是"inherently an inadequate application development platform."

  8. 市面上常見的webtop Retrieved from "http://en.wikipedia.org/wiki/Web_desktop"

  9. Desktoptwo的畫面

  10. Desktoptwo的email

  11. YouOS首頁

  12. YouOS login後

  13. YouOS的內容

  14. 下載功能開始使用說明中心和其他人討論企業版下載功能開始使用說明中心和其他人討論企業版 Google desktop

  15. Webtop的未來

  16. 謝謝！！

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