tailieunhanh - Principles of Network and System Administration 2nd phần 9

hiệu quả hơn trong giờ người đàn ông hơn một nơi con người ở ghế lái xe. Giả thiết này, tất nhiên, đó là cài đặt và bảo trì của hệ thống tự động là không quá tốn thời gian của riêng mình như lớn hơn những lợi thế được cung cấp bởi cách tiếp cận như vậy. | 506 CHAPTER 13. ANALYTICAL SYSTEM ADMINISTRATION more efficient in man hours than one which places humans in the driving seat. This presupposes of course that the setup and maintenance of the automatic system is not so time-consuming in itself as to outweigh the advantages provided by such an approach. Evaluation of system administration as a collective effort Few system administrators work alone. In most cases they are part of a team who all need to keep abreast of the behavior of the system and the changes made in administration policy. Automation of system administration issues does not alter this. One issue for human administrators is how well a model for administration allows them to achieve this cooperation in practice. Does the automatic system make it easier for them to follow the development of the system in i theory and ii practice Here theory refers to the conceptual design of the system as a whole and practice refers to the extent to which the theoretical design has been implemented in practice. How is the task distributed between people systems procedures and tools How is responsibility delegated and how does this affect individuals Is time saved are accuracy and consistency improved These issues can be evaluated in a heuristic way from the experiences of administrators. Longer-term more objective studies could also be performed by analyzing the behavior of system administrators in action. Such studies will not be performed here. Cooperative software dependency The fragile tower of components in any functional system is the fundament of its operation. If one component fails how resilient is the remainder of the system to this failure This is a relevant question to pose in the evaluation of a system administration model. How do software systems depend on one another for their operation If one system fails will this have a knock-on effect for other systems What are the core systems which form the basis of system operation In the present .