Module 2: Concepts of Server Clusters. Overview Introduction to Server Clusters Key Concepts of a Server Cluster Choosing a Server Cluster Configuration.

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Presentation transcript:

Module 2: Concepts of Server Clusters

Overview Introduction to Server Clusters Key Concepts of a Server Cluster Choosing a Server Cluster Configuration Applications and Services on Server Clusters

 Introduction to Server Clusters

Clustering Techniques Shared Everything Model Mirrored Servers Shared Nothing Model

Availability and Scalability Availability Cluster Service Improves Availability of Applications and Services Scalability Cluster Service Improves Scalability by Adding More Computers to the Cluster

Multimedia: Microsoft Windows 2000 Cluster Service

Key Concepts of a Server Cluster Client Private Network Private Network Server Cluster Quorum Disk 1 A Group of Resources Virtual Server Virtual Server Disk 1 Print Share File Share Public Network Public Network Node A Node B

Cluster Disks Node A Node B Disk 4 Disk 3 Disk 2 Disk 1 Quorum

Quorum Resource Data Storage Arbitration Quorum Ownership Updates for Nodes Coming Online

Cluster Communications Private Network Public Network Mixed Network

Groups and Resources \\Server File Share Printer Share \\Server File Share Printer Share \\Cluster Logical Disk \\Cluster Logical Disk \\Server Application \\Server Application Node A Node B Server Cluster Disk 1 Disk 3 Disk 2 Logical Disk Group 1 Group 2 Group 3

Resource Dependencies FS-1 File Share FS-1 File Share PD-1 Physical Disk PD-1 Physical Disk IP-1 IP Address IP-1 IP Address NN-1 Network Name NN-1 Network Name FS-1 File Share FS-1 File Share IP-1 IP Address IP-1 IP Address NN-1 Network Name NN-1 Network Name PD-1 Physical Disk PD-1 Physical Disk Recommended Vertical Dependency Not Recommended Forking Dependency

Virtual Servers Client Access to Virtual Servers Virtual Server Environment Virtual Server Naming Named Pipe Remapping Registry Replication

Virtual Server Name Resolution Node B Group 1 Node A WINS \\VirtualServer = WINS \\VirtualServer = DNS \\VirtualServer.nwtraders.msft = DNS \\VirtualServer.nwtraders.msft = Active Directory Share = \\VirtualServer\Share or Share = \\VirtualServer.mwtraders.msft Active Directory Share = \\VirtualServer\Share or Share = \\VirtualServer.mwtraders.msft \\VirtualServer \\VirtualServer.nwtraders.msft \\ \\VirtualServer \\VirtualServer.nwtraders.msft \\ Disk 1 Quorum Disk 1

Failover and Failback Node A Node B Failover Node A Node B Failback Group 1 Quorum Disk 1 Quorum Disk 1

Demonstration: Cluster Concepts

 Choosing a Server Cluster Configuration Virtual Server Failover Capability PerformanceConsiderationsPerformanceConsiderationsClusterConfigurationClusterConfiguration No Cluster Needed Single Node Virtual Server Single Node Virtual Server Active/Passive Active/Active

Active/Passive Configuration Quorum Disk 1 Node A Node B \\ACCOUNTING Group 1 Node A manages virtual server \\ACCOUNTING. Node B is configured as a hot spare and will take ownership of \\accounting if Node A goes offline. Cluster Service Disk 1

Active/Active Configuration Cluster Service Disk 2 Quorum Disk 1 Node A \\ENGINEERING Group 1 Capacity to fail over Group 2 Capacity to fail over Group 2 \\ACCOUNTING Group 2 Capacity to fail over Group 1 Capacity to fail over Group 1 Node B Disk 1 Disk 2

Hybrid Configuration Quorum Disk 1 Node A Node A providing DNS outside the cluster Node A providing DNS outside the cluster Node B providing File/Print outside the cluster Node B providing File/Print outside the cluster \\ENGINEERING Group 1 Capacity to fail over \\engineering Capacity to fail over \\engineering Node B Disk 1

Single Node Virtual Server Not Shared Clients can access any virtual server in the cluster. Clients can access any virtual server in the cluster. Disk 2 Quorum Disk 1 Node A Group 2 Cluster Service Group 1 Disk 1 Disk 2 \\ENGINEERING \\ACCOUNTING

 Applications and Services on Server Clusters Applications Services File and Print Shares Identifying Performance Limitations

Applications Cluster-Aware Applications Cluster-Unaware Applications

Services DFS DHCP WINS

File and Print Shares Client

Identifying Performance Limitations Node A Quorum Disk 1 Node B Exchange 2000 Exchange 2000 File / Print Group 1 Group 2

Review Introduction to Server Clusters Key Concepts of a Server Cluster Choosing a Server Cluster Configuration Applications and Services on Server Clusters