tailieunhanh - Microsoft Press mcsa mcse self paced training kit exam 70 - 293 phần 5

Khi các tổ chức trở nên ngày càng phụ thuộc vào mạng lưới máy tính của họ, phân nhóm là trở thành một yếu tố ngày càng quan trọng của các mạng. Nhiều doanh nghiệp hiện nay dựa trên World Wide Web cho tất cả các liên lạc của họ với hàng của cus, bao gồm cả việc để tham gia và nhiệm vụ sản xuất doanh thu khác. | 7 Clustering Servers Exam Objectives in this Chapter Plan services for high availability Plan a high availability solution that uses clustering services Plan a high availability solution that uses Network Load Balancing Implement a cluster server Recover from cluster node failure Manage Network Load Balancing. Tools might include the Network Load Balancing Manager and the WLBS cluster control utility Why This Chapter Matters As organizations become increasingly dependent on their computer networks clustering is becoming an increasingly important element of those networks. Many businesses now rely on the World Wide Web for all their contact with customers including order taking and other revenue-producing tasks. If the Web servers go down business stops. Understanding how clustering works and how Microsoft Windows Server 2003 supports clustering is becoming an important element of the network administrator s job. Lessons in this Chapter Lesson 1 Understanding Lesson 2 Using Network Load Balancing. 7-14 Lesson 3 Designing a Server Cluster . 7-30 Before You Begin This chapter assumes a basic understanding of Transmission Control Protocol Internet Protocol TCP IP communications as described in Chapter 2 Planning a TCP IP Network Infrastructure and of Microsoft Windows network services such as DNS and DHCP. To perform the practice exercises in this chapter you must have installed and configured Windows Server 2003 using the procedure described in About This Book. 7-1 7-2 Chapter 7 Clustering Servers Lesson 1 Understanding Clustering A cluster is a group of two or more servers dedicated to running a specific application or applications and connected to provide fault tolerance and load balancing. Clustering is intended for organizations running applications that must be available making any server downtime unacceptable. In a server cluster each computer is running the same critical applications so that if one server fails the others detect the failure and .