Clusters and High Availability

This chapter covers the following topics:

• Cluster Concepts and Overview

• Distributed Resource Scheduler (DRS)

• vSphere High Availability (HA)

• Other Resource Management and Availability Features

This chapter contains information related to VMware vSphere 8.x Professional (2V0-21.23) exam objectives 1.4, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.4.4.1, 1.4.4.2, 1.4.5, 4.6, 4.7, 5.1, 5.1.1, 5.2, 6.1, 7.5, and 7.9.5.

This chapter provides details on clusters and high availability in vSphere 8.0.

“Do I Know This Already?” Quiz

The “Do I Know This Already?” quiz allows you to assess whether you should study this entire chapter or move quickly to the “Exam Preparation Tasks” section. In any case, the authors recommend that you read the entire chapter at least once. Table 4-1 outlines the major headings in this chapter and the corresponding “Do I Know This Already?” quiz questions. You can find the answers in Appendix A, “Answers to the ‘Do I Know This Already?’ Quizzes and Review Questions.”

Table 4-1 “Do I Know This Already?” Foundation Topics Section-to-Question Mapping

1. You want to implement EVC to ensure that vMotion is enabled across a specific set of ESXi hosts. Which of the following are requirements? (Choose two.)

1. Hosts must be connected to a DRS cluster.

2. Hosts must be connected to a vCenter Server.

3. CPUs must be configured with a custom compatibility mask.

4. You must select either Enable EVC for AMD Hosts or Enable EVC for Intel Hosts.

2. In vSphere 8.0, you want to configure the DRS migration threshold such that it is at the minimum level at which virtual machine happiness is considered. Which of the following values should you choose?

1. Level 1

2. Level 2

3. Level 3

4. Level 4

5. Level 5

3. Which of the following is not a good use for resource pools in DRS?

1. To delegate control and management

2. To impact the use of network resources

3. To impact the use of CPU resources

4. To impact the use of memory resources

4. You want to use shares to give high-priority resource access to a set of virtual machines in a resource pool, without concern for the relative number of objects in the pool compared to other pools. Which feature is helpful?

1. Limits

2. Standard shares

3. Scalable shares

4. DRS advanced settings

5. You are configuring vSphere HA in a cluster. You want to configure the cluster to use a specific host as a target for failovers. Which setting should you use?

1. Host Failures Cluster Tolerates

2. Define Host Failover Capacity By set to Cluster Resource Percentage

3. Define Host Failover Capacity By set to Slot Policy (Powered-on VMs)

4. Define Host Failover Capacity By set to Dedicated Failover Hosts

5. Define Host Failover Capacity By set to Disabled

6. You are enabling VM Monitoring in a vSphere HA cluster. You want to set the monitoring level such that its failure interval is 60 seconds. Which of the following options should you choose?

1. High

2. Medium

3. Low

4. Normal

7. You are configuring Virtual Machine Component Protection (VMCP) in a vSphere HA cluster. Which of the following statements is true?

1. For PDL and APD failures, you can control the restart policy for virtual machines by setting it to Conservative or Aggressive.

2. For PDL failures, you can control the restart policy for virtual machines by setting it to Conservative or Aggressive.

3. For APD failures, you can control the restart policy for virtual machines by setting it to Conservative or Aggressive.

4. For PDL and APD failures, you cannot control the restart policy for virtual machines.

8. You want to configure your environment to use predictive metrics when making placement and balancing decisions. What feature is required?

1. Predictive DRS

2. Aria Automation

3. Proactive HA

4. Slot Policy

9. You are configuring vSphere Fault Tolerance (FT) in a vSphere 8.0 environment. What is the maximum number of virtual CPUs you can use with an FT-protected virtual machine?

1. One

2. Two

3. Four

4. Eight

10. You are concerned about service availability for your vCenter Server. Which of the following statements is true?

1. If a vCenter service fails, VMware Service Lifecycle Manager restarts it.

2. If a vCenter service fails, VMware Lifecycle Manager restarts it.

3. If a vCenter service fails, vCenter Server HA restarts it.

4. VMware Service Lifecycle Manager is a part of the PSC.