The Practice of System and Network Administration Second Edition phần 4 docx

... let them make the decision without having to understand the technology, and they were able to break the tie where the SAs disagreed. By the time the hardware was ready, the grid was complete. The ... availability of and access to the manufacturing control systems was of the utmost importance. A large networking hardware and software company, the crown jewels we...

Ngày tải lên: 14/08/2014, 14:20

... 562 24 Print Service 565 24. 1 The Basics 566 24. 1.1 Level of Centralization 566 24. 1.2 Print Architecture Policy 568 24. 1.3 System Design 572 24. 1 .4 Documentation 573 24. 1.5 Monitoring 5 74 24. 1.6 ... Contents 23 Email Service 543 23.1 The Basics 543 23.1.1 Privacy Policy 544 23.1.2 Namespaces 544 23.1.3 Reliability 546 23.1 .4 Simplicity 547 23.1.5 Spam and...

Ngày tải lên: 14/08/2014, 14:20

... simplicity on the physical layer. You can build a very simple and therefore stable—flat physical network and then construct overlay networks on top of the solid base to give the ap- pearance of the more ... the machines and lighting in the data center, the HVAC system, the UPS charging, the phone switches, the SA work area, and the customer service center....

Ngày tải lên: 14/08/2014, 14:20

... server room and most of the networks in his division. Ouch! 4. 1 The Basics 77 are available. The lower grades ship replacement parts to the site; more ex- pensive ones deliver the part and do the installation. Cross-shipped ... vendor and the release of the compatible new version from the second vendor. Also, relations between the two vendors may break down,...

Ngày tải lên: 14/08/2014, 14:20

... whether the change should go ahead regardless of ‘ the weather’’ or wait until there is ‘‘good weather’’: the operating status of the service. In other words, some changes are approved on the ... schedule, rather than the other way around. When his customer made a mistake, Tom was blamed because some of the group’s systems depended on the customer’s systems. The custome...

Ngày tải lên: 14/08/2014, 14:20

... when the cost model showed the systems to cost about the same per gigabyte of usable storage, the dedicated file servers had an advantage over the old systems: consistency and support. The old systems ... mishmash of various manufacturers for the host; for the RAID controllers; and for the disk drives, cables, network interfaces, and, in some cases, even the rac...

Ngày tải lên: 14/08/2014, 14:20

... 4. 00 4. 00 4. 00 4. 00 2 4. 00 0 .40 0 .40 0 .40 0 .40 0 .40 3 4. 00 0 .44 0 .44 0 .44 0 .44 0 .44 4 4.00 0 .48 0 .48 0 .48 0 .48 0 .48 5 4. 00 0.52 0.52 0.52 0.52 0.52 6 4. 00 0.56 0.56 0.56 0.56 0.56 7 4. 00 0.60 0.60 ... 0. 84 0. 84 0. 84 14 4.00 0.60 0.88 0.88 0.88 0.88 15 4. 00 4. 00 4. 00 0.92 0.92 0.92 16 4. 00 0 .40 0 .40 0.96 0.96 0.96 17 4. 00 0 .44 0 .44 1.00...

Ngày tải lên: 14/08/2014, 14:21

... the processing, leaving the CPU less loaded and better able to do the remaining work of moving the data off the disk, through the card, and onto the network. ❖ LAMP and Other Industry Terms Certain ... centralized and decentral- ized models for the system administration organization has an impact on customer support and the relationships between the SAs...

Ngày tải lên: 14/08/2014, 14:21

... isolated, unimportant, and not part of the team. The longer people stay with the group and the less turnover there is, the more they will feel part of the team and the more likely they are to stick with ... servers, printers, other people’s PCs, and the like. This has the same effect as if someone walked up to another person’s PC when no one was around and pull...

Ngày tải lên: 14/08/2014, 14:21

... existing systems and improving them, scaling large systems into hu- mongous systems, and overhauling legacy systems and replacing them with newer systems. Infrastructure Builders are proud of their ... the summer. That autumn, after they left, the SAs had to decommission their computers and clean the large room they had been sharing. The SAs found a scrap of paper that had...

Ngày tải lên: 14/08/2014, 14:21