1. What is a quorum? Describe the four different quorum mode configurations in W

Question

1. What is a quorum? Describe the four different quorum mode configurations in Windows Server 2008.

2. Describe how a two-node file server failover cluster can improve availability of resources in your company network. Address the following issues:

i. Hardware and software requirements for a two-node failover cluster.

ii. Protocols or services required, such as security or authentication issues.

iii. Describe a possible configuration of a two-node failover cluster, such as shared folders, clients and servers…

3. Describe the differences in the boot environment between the Windows Server 2008/Vista BCD (Boot Configuration Data) and the legacy boot.ini environment.

4. For the following objects, which two or three counters should be monitored for problems or bottlenecks, and what do they measure?

i. Processor

ii. Memory

iii. Physical Disk

iv. Network Interface

Explanation / Answer

1)Answer:

Quorum:

A cluster quorum disk is the storage medium on which the configuration database is stored for a cluster computing network. The cluster configuration database, also called the quorum, tells the cluster which physical server(s) should be active at any given time. The quorum disk comprises a shared block device that allows concurrent read/write access by all nodes in a cluster.

Node Majority—There's no file-share witness or disk witness and votes are assigned only to nodes. More than 50 percent of the nodes must be available to make quorum. Node majority works best if you have an odd number of nodes. I recommend the Node Majority mode if you have an odd number of nodes, and you have a multi-site cluster, a cluster with no shared storage, or a single-node cluster.

Node and Disk Majority—Nodes and a shared disk get votes. This configuration allows a loss of half the nodes, providing the disk witness is available, or over half the nodes are available without the disk witness being available. I recommend Node and Disk Majority mode if your cluster has an even number of nodes.

Node and File Share Majority—The same as Node and Disk Majority, except the shared disk is replaced with a file-share witness. I recommend a Node and File Share majority mode if you have multi-site cluster, an even-node cluster, a cluster with no shared storage, or a two-node cluster.

No Majority: Disk Only—The disk witness must be available to have quorum, but the number of available nodes doesn't matter. If you have a four-node cluster and only one node is available, but the disk witness is available, you have quorum. If the disk witness isn't available, then even if all four nodes are available you can't have quorum. I never recommend the No-Majority: Disk-Only mode.

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