Any time after the fix application, you can elect to rollback to the previous virtualsystem state by simply clicking a button.
在应用补丁之后的任何时间，只需要单击按钮就可以轻松地回滚到先前的虚拟系统状态。
2
They compare this situation to the time when developers had to seemingly write operating system level code to handle "multi-tasking" or "virtual memory management".
他们将这种情形比作开发者似乎不得不要书写操作系统级别代码来处理“多任务”或“虚拟内存管理”的时代。
3
Conversely, when the usage of a virtualsystem is lower than the predefined threshold for a certain time, idle nodes are removed or memory is drawn back.