Roaming directory must first understand what directory is, after the user logs on the computer, the first to enter the directory is its home directory (also known as the "home directory"). For example, on Windows operating systems, zsan the user's home directory is C: \ Users \ zsan. On Linux operating system, its home directory is / home / zsan.
There are many more home directory under a subdirectory, such as "desktop" subdirectory "My Documents" subdirectory "download" subdirectory "My Music" subdirectory "My Videos" subdirectory " my pictures "subdirectory and so on. Unless otherwise specified, the user data are stored in their home directory (home directory or subdirectories).
Each time you log tenant cloud, may be assigned to a different server, such as a tenant for the first time be assigned to the III server, and compiled a resume, after a few days, when he was assigned to re-sign in the clouds AAA server, and his resume was gone, because the resume saved on the server III.
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To solve the above problem, on the introduction of the tenants home directory roaming technology, the disk file / one output device, a computing device via a computer network as a separate input software, such computing devices and input / output devices completely separated.
All tenants of the home directory all stored in the network storage device, the automatic trigger an action when you log in tenant: the tenant of this home directory is mounted to this server up. Log trigger another action when tenants: Uninstall home directory. So that regardless of which server to log tenants, he can correctly access your home directory. Storage devices on the network, and therefore can treat it as a cloud, but this function is to provide cloud storage service, apparently belonging to the IaaS cloud.
At speeds fast enough, it is recommended the formation of a public storage cloud, every citizen free distribution 1TB of storage space, storage of all personal identifiable information, private information and archival material. Cloud computing services (IaaS, PaaS, SaaS) led by business or industry, they compete with each other for tenants to provide a wide range of computing services, and tenants via mobile or fixed terminal at any time and obtain the appropriate access these cloud computing services. This is a huge system, the whole society to participate.