管理：服务器和某些软件需要连续维护，比如安装安全补丁、升级操作系统和中间件、用户账号管理等等。
Administration: servers, and in particular software, requires continuous upkeep such as installation of security patches, upgrade of the OS and middleware, user account management and so on.
向上扩展包括升级硬件或优化软件以确保单个服务器机组能够支持更多用户。
Scaling up involves upgrading the hardware or optimizing the software to ensure that a single server machine set can support more users.
软件维护包括升级指定计算机上的操作系统和应用服务器软件。
Software maintenance includes upgrades to both the operating system and the application server software on a given machine.
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