Đang chuẩn bị liên kết để tải về tài liệu:
The Practice of System and Network Administration Second Edition phần 6

Ngoài việc tập trung vào việc cải thiện từng bước, bạn cũng có thể tập trung vào việc cải thiện toàn bộ quá trình. Chuyển đến mỗi bước tiến mới nên chất lỏng. Nếu khách hàng nhìn thấy một bàn giao, Staccato đột ngột giữa các bước, các quá trình có thể xuất hiện không chuyên nghiệp hoặc rời rạc. | 486 Chapter 20 Maintenance Windows 20.1.7.2 KVM and Console Service Two data center elements that make management easier are KVM switches and serial console servers. Both can be instrumental in making maintenance windows easier to run by making it possible to remotely access the console of a machine. A KVM switch permits multiple computers to all share the same keyboard video display and mouse. A KVM switch saves space in a data center monitors and keyboards take up a lot of space and makes access more convenient indeed more sophisticated console access systems can be accessed from anywhere in the network. A serial console server connects devices with serial consoles systems without video output such as network routers switches and many UNIX servers to one central device with many serial inputs. By connecting to the console server a user can then connect to the serial console of the other devices. All the computer room equipment that is capable of supporting a serial console should have its serial console connected to some kind of console concentrator such as a networked terminal server. Much work during a maintenance window requires direct console access. Using console access devices permits people to work from their own desks rather than having to try to coordinate access for many people to the very limited number of monitors in the computer room or having to waste computer room space power and cooling with more monitors. It is also more convenient for the individual SAs to work in their own workspace with their preparatory notes and reference materials around them. 20.1.7.3 Radios Because the maintenance window is tightly scheduled the high number of dependencies and the occasional unpredictability of system administration work all the SAs have to let the flight director know when they are finished with a task and before they start a new task to make sure that the prerequisite tasks have all been completed. We recommend using handheld radios to communicate .