Clusters and High Availability

This chapter covers the following topics:

• Cluster Concepts and Overview

• Distributed Resources Scheduler (DRS)

• vSphere High Availability (HA)

• Other Resource Management and Availability Features

This chapter contains information related to Professional VMware vSphere 7.x (2V0-21.20) exam objectives 1.6, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.4.1, 4.5, 4.6, 5.1, 5.1.1, 5.2, 7.5, and 7.11.5.

This chapters provides details on clusters and high availability in vSphere 7.0.

“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?” Section-to-Question Mapping

1. You are configuring EVC Mode in a vSphere cluster that uses Intel hardware. Which of the following values should you choose to set the EVC Mode to the lowest level that includes the SSE4.2 instruction set?

   1. Merom

   2. Penryn

   3. Nehalem

   4. Westmere

2. In vSphere 7.0, you want to configure the DRS migration threshold such that it is at the minimum level at which the 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 need your resource pool to use a two-pass algorithm to allocate reservations. In the second pass, excess pool reservation is allocated proportionally to virtual machines (limited by virtual machine size). Which step should you take?

   1. Ensure that vSphere 6.7 or higher is used.

   2. Ensure that vSphere 7.0 or higher is used.

   3. Enable scalable shares.

   4. Enable expandable reservations.

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 use Predictive DRS. What is the minimum vSphere version you need?

   1. vSphere 6.0

   2. vSphere 6.5

   3. vSphere 6.7

   4. vSphere 7.0

9. You are configuring vSphere Fault Tolerance (FT) in a vSphere 7.0 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.