組員： 張世謙 林原瑭 黃郁翔

 Introduction  Design approach  Optimization Approaches  Conclusion and future directions 張世謙、 林原瑭、 黃郁翔

報告者： 張世謙

 No installation  Allow multi-clients interact and share the same data and app set over the Internet  More focus on mobile device  Access only through web browser  Cloud-based 張世謙、 林原瑭、 黃郁翔

 Cloud platform  Cloud service  Cloud storage 張世謙、 林原瑭、 黃郁翔

 Make collaboration simpler  Reduce platform-incompatibility problems  Reduce capital costs  Improve accessibility 張世謙、 林原瑭、 黃郁翔

 Data is stored in a cloud / cloud-like infrastructure  Data can be cached locally for full-offline mode  Can be used from web browser and/or custom built apps installed on Internet connected devices such as desktops, mobile phones  Support for different user requirements 張世謙、 林原瑭、 黃郁翔

 exclusively designed to be used from a web browser  The obvious benefit that this computing model provides over the traditional desktop app is that it is accessible from anywhere via the web browser 張世謙、 林原瑭、 黃郁翔

 Web-based is involved in cloud based  True multi-tenancy to support various requirements & needs for consumers  Support for virtualization technology, which plays a starring role for cloud era apps 張世謙、 林原瑭、 黃郁翔

 Google Chrome OS  EyeOS  HP Palm OS  Openmobster 張世謙、 林原瑭、 黃郁翔

 Cross compatibility  Off loading work  No-plugin based system 張世謙、 林原瑭、 黃郁翔

 Can be launched by typing a URL(web browser)  No plugin components  Run until the client-side offline  Basic OS services  Security  Friendly Mobile browsing 張世謙、 林原瑭、 黃郁翔

報告者： 林原瑭

 Cloud archteciture MeghaOS -> app server  Web browser -> end user 張世謙、 林原瑭、 黃郁翔

 Unify the system services  General operating system utilities  Communication and location 張世謙、 林原瑭、 黃郁翔

 Handle low level tasks  VFS, EFM, Process Manager…  Libraries similar to services collection of functions 張世謙、 林原瑭、 黃郁翔

 Handle directories and files  Private editable  How to create a file?  Two files  One for storing the content of the file, another for storing information about the file by XML format.  Real files 張世謙、 林原瑭、 黃郁翔

 User registering, logging in, etc 張世謙、 林原瑭、 黃郁翔

 Download file from the outside  URL accessible  Image hosting, CSS files, etc 張世謙、 林原瑭、 黃郁翔

 Launch, list, end processes, etc.  Launch processes Need 2 variables myPid: 4 digit, identifies every processes Checknum: 8 digit, identifies every process in client-server communication 張世謙、 林原瑭、 黃郁翔

 Define the communication between the client and the cloud server.  Cloud server stores and processes the data Client: send information or ask for information Get an XML response, containing the orders to modify the client interface 張世謙、 林原瑭、 黃郁翔

 Manages the XML responses sent by the server in exchange of information using XML HTTP Response and Request functions 張世謙、 林原瑭、 黃郁翔

報告者： 黃郁翔

 N: 需要執行的指令數  S: 執行速度  P: 消耗功率  M: client 與 server 之間交換資料的大小  B: 網路傳輸速率 張世謙、 林原瑭、 黃郁翔

 Effect of Caching  Analysis of Bandwidth  Network Latency 張世謙、 林原瑭、 黃郁翔

 MeghaOS  No installation  High compatibility  Customized  張世謙、 林原瑭、 黃郁翔