| Summary: | 碩士 === 大同大學 === 資訊工程學系(所) === 100 === The Cloud Computing is a concept, to replace software installed in the local host for sharing resource and information through internet. Or save data on internet instead of local hard disks, and execute various programs. The internet provides service to save data on remote server and interface for various data computing through browsing the web pages. The Cloud Computing seems to be great, but there are few concerns raised, such as: slow data accessing speed, internet disconnection, and data security…etc.
This paper will discuss and design the backup solution and proxy mechanism when the internet is discounted. When the internet is connected, Daemon will compare if the data and application program modules are consistent in the Cloud Server and local host through MD5 hash function. And use improved RPM, APT, YUM...etc technologies to package, download, and install application program modules to synchronize data and application program modules. When the internet is discounted, Daemon will load application program modules and data in the host automatically and update them to the Cloud Server when the internet is connected. In the Proxy mechanism, except enhance internet data security and internet usage by using the character of Proxy Server, the application program module update mechanism will be included.
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