TAILIEUCHUNG - Windows 2000 Server System Administration Handbook P2

Increased Reliability, Availability, and Scalability Reliability, availability, and scalability are important parameters of network operating systems. An operating system should be able to work 24 hours a day, seven days a week, and the administrator should not be required to perform a reboot after every configuration change; in addition, the operating system should be able to correct itself when problems occur. Finally, an operating system should be able to grow in order to meet the demands of expanding businesses. Reliability is the measure of the consistency with which a computer runs its applications and services. Windows 2000 Server provides many reliability. | 6 Chapter 1 The Windows 2000 System Administration Migration Path improving the system s overall reliability and scalability providing a powerful Internet and application server and providing a powerful end-to-end management solution while reducing total cost of ownership. Increased Reliability Availability and Scalability Reliability availability and scalability are important parameters of network operating systems. An operating system should be able to work 24 hours a day seven days a week and the administrator should not be required to perform a reboot after every configuration change in addition the operating system should be able to correct itself when problems occur. Finally an operating system should be able to grow in order to meet the demands of expanding businesses. Reliability is the measure of the consistency with which a computer runs its applications and services. Windows 2000 Server provides many reliability solutions including Core operating system services Fault tolerance Disaster recovery System recovery and updates Reliable storage Avoidance of outages and reboots Core Operating System Services Windows 2000 Server provides these core operating system services Error handling and protected subsystems Recoverable file system Automatic restart The operating system is designed to correct itself by managing errors without crashing the entire computer. The operating system The Windows 2000 System Administration Migration Path Chapter 1 7 ensures that a fault in one program will not affect other running programs by using protected subsystems that isolate programs in memory. Windows 2000 s new NTFS file system logs all disk I O operations as individual unique transactions so the system provides fault tolerance by undoing or redoing transactions after a system is brought back up after having suffered a disk failure. It is to be hoped that your system will never have to restart itself after a system failure however if a failure does occur Windows 2000 .

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