As we see in the next section, memory size has a major influence on performance. Memory is so inexpensive these days that you can usually afford to load every performance-sensitive machine to the gills. Double-check the configuration of the system and of individual applications. Many applications can be tuned in ways that yield tremendous performance improvements e.
[P.D.F] Application Administrators Handbook: Installing, Updating and Troubleshooting Software
SSDs are easily installed in place of existing old-school disk drives. These boxes make several physical servers appear to be one logical server to the outside world. For specific applications such as databases, you can use a fancy multidisk technology such as striped RAID to optimize data transfers. Consult your database vendor for recommendations. RAID comes in many forms; take time to determine which form if any is appropriate for your particular application. Monitor your network to be sure that it is not saturated with traffic and that the error rate is low.
A wealth of network information is available through the netstat command, described on page See also Chapter 20, Network Management and Debugging. Identify situations in which the system is fundamentally inadequate to satisfy the demands being made of it. Perhaps the most important skill for a system administrator is problem solving —frequently under various sorts of constraints and stress.temp.cmnv.org/histoire-dun-roman-de-gare-french.php
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The sysadmin is on call when a computer system goes down or malfunctions, and must be able to quickly and correctly diagnose what is wrong and how best to fix it. They may also need to have teamwork and communication skills; as well as being able to install and configure hardware and software. Sysadmins must understand the behavior of software in order to deploy it and to troubleshoot problems, and generally know several programming languages used for scripting or automation of routine tasks.
A typical sysadmin's role is not to design or write new application software but when they are responsible for automating system or application configuration with various configuration management tools, the lines somewhat blur. That said, system administrators are not software engineers or developers , in the job title sense.
Particularly when dealing with Internet -facing or business-critical systems, a sysadmin must have a strong grasp of computer security. This includes not merely deploying software patches, but also preventing break-ins and other security problems with preventive measures. In some organizations, computer security administration is a separate role responsible for overall security and the upkeep of firewalls and intrusion detection systems , but all sysadmins are generally responsible for the security of computer systems.
In larger organizations, some of the tasks above may be divided among different system administrators or members of different organizational groups. For example, a dedicated individual s may apply all system upgrades, a Quality Assurance QA team may perform testing and validation, and one or more technical writers may be responsible for all technical documentation written for a company.
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System administrators, in larger organizations, tend not to be systems architects , systems engineers , or systems designers. In smaller organizations, the system administrator might also act as technical support, Database Administrator , Network Administrator , Storage SAN Administrator or application analyst. From Wikipedia, the free encyclopedia.
For the privileged user account, see Superuser. Management accounting Financial accounting Financial audit.
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