VMware 5V0-22.21 VMware vSAN Specialist Exam Practice Test

According to VMware's official guide, Network I/O Control (NIOC) should be utilized in order to share the physical adapters' capacity among several traffic types. Additionally, isolating the vSAN traffic in a VLAN will provide enhanced security, as it isolates vSAN traffic from the rest of the network traffic. Enabling jumbo frames and creating static routes between the vSAN hosts will not provide the desired result, as these are not related to the requirements. Utilizing IOPS Limit rules in storage policies is also not related to the requirements, as this is related to storage policies and not network configuration.

About the vSAN Default Storage Policy

VMware vSAN Design Guide | VMware

vSAN Policies

The vSAN administrator should check VMKNICs, uplinks, physical switches, and associated settings. High network latency can be caused by incorrect networking configurations or misconfigured switch settings. By checking the VMKNICs, uplinks, and switches, the vSAN administrator can identify any potential causes of the high network latency and take steps to remedy them.

An all-flash vSAN cluster contains a sufficient number of capacity devices and cache devices to support different RAID levels.

FTT=3(RAID-1 Mirroring) - This policy requires at least 4 capacity devices, where each object is mirrored across three copies of the object. This can be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=1 (RAID-1 Mirroring) - This policy requires at least 2 capacity devices, where each object is mirrored across one copy of the object. This can be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=2 (RAID-6 Erasure Coding) - This policy requires at least 6 capacity devices, where each object is striped across two sets of parity and data. This cannot be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=1 (RAID-5 Erasure Coding) - vSAN does not support RAID-5 Erasure coding.

Two characteristics of the vSAN Data-At-Rest Encryption (DARE) are that it is Software Defined and works independently of the Cache or Capacity drives installed on the Nodes, and it continues to operate unaffected during downtime on vCenter Server. According to VMware's Official Guide, "vSAN Data-At-Rest Encryption (DARE) is a software-defined solution that works independently of the Cache or Capacity drives installed on the Nodes". Additionally, "DARE continues to operate unaffected during downtime on vCenter Server". Thus, these two characteristics make DARE an ideal encryption solution for vSAN.

According to the VMware vSAN documentation [1], the vSAN Proactive Test is a built-in feature of vSAN that can be used to test the health of a vSAN cluster and verify that the network performance meets the throughput requirements. This tool can be accessed through the vSAN Health Service. [1]

To add an ESXi host with no disks to an existing vSAN cluster, the vSAN administrator needs to take the following steps:

• Create a vSAN VMKernel interface on the new host, the interface should be configured with the same network settings as the existing vSAN cluster.
• Create the required disk groups for the newly added host, the disk groups should contain at least one cache device and one or more capacity devices.
• Add the new host to the vSAN cluster, this can be done through the vSphere Web Client.
• Configure the storage policies and assign them to the virtual machines as needed.

It's worth noting that adding a host to an existing vSAN cluster does not require adding a minimum of three ESXi hosts or iSCSI shares, the host can be added without these requirements. Also, having physical NICs with equal network throughput is recommended but not a requirement.

This is explained in VMware vSAN documentation in the section "Adding a Host to a vSAN Cluster" Reference:

This is the most efficient way of configuring a vSAN Direct Configuration on an existing cluster because it does not require the administrator to delete any existing disk groups or add any additional disks. The administrator can use the vSphere Client or vSphere Web Client to view the available disks in the Disk Management tab [1], and then claim the unused disks from the disk groups to be used for the vSAN Direct Configuration. After all of the disks have been claimed, the administrator can run the vSAN Direct Configuration wizard.

1. Configuring vCenter Server to send alarms when virtual machines ...

VMware vCenter Server 7.0 Update 1 Release Notes

VMWARE TRADEMARK GUIDE

According to VMware's documentation, the "No Data Migration" option for maintenance mode should be used when the expected maintenance time is less than one hour. This option will allow the administrator to complete their maintenance without having to wait for a full data migration, which can be time consuming and also has additional capacity and performance considerations. It is important to note that this option will not guarantee the same level of availability as the other options, so it should only be used when the expected maintenance time is less than one hour.

vSAN 2-Node Cluster Guide | VMware

Deploying a vSAN Witness Appliance

vSAN Stretched Cluster Guide | VMware

The RAID configuration that the administrator must use in this storage policy to achieve the best performance for the database virtual machines is RAID-6.

RAID-6 is an effective configuration for a vSAN cluster with eight hosts as it allows for two hosts to fail and still maintain protection of the data. RAID-6 is a data striping configuration with two parity bits stored across multiple disks, which improves read performance while also providing fault tolerance.

For more information, see the official VMware guide on vSAN Storage Policies:

The correct action to take to ensure it is safe to power down a vSAN 7.0 U1 cluster containing production virtual machines is to enter Maintenance Mode with the Ensure Accessibility option. This option will migrate the data from the disk groups in the vSAN cluster to other disk groups in the same cluster, and will allow the administrator to power down the cluster without any data loss.

You can silence the vSAN health status alerts from the vCenter HTML client. This will prevent vCenter from sending notifications during the scheduled maintenance window. To silence an alert, you can navigate to the "Monitoring" tab, go to "Alarms" and click on the desired alert to open its settings. From there, you can select "Actions" and then "Silence Alarm". This will prevent notifications for the selected alert until it is cleared or unsilenced.

Please note that this is not a permanent solution and will need to be reapplied after maintenance if desired. Reference:

According to VMware's official guide, the vSAN Data Persistence platform uses two storage policy types: Shared Nothing Architecture and vSAN Direct Configuration. Shared Nothing Architecture is a policy type that enables virtual machines to share a common storage pool and enables applications to scale out across multiple nodes. vSAN Direct Configuration is a policy type that allows applications to be deployed directly on the vSAN datastore and enables them to use the underlying vSAN storage features.

About the vSAN Default Storage Policy

VMware vSAN Design Guide | VMware

vSAN Policies

vsantop is a command line utility that can be used to monitor the performance of a vSAN cluster in real-time. It provides detailed information about the performance of the vSAN cluster and its components, including disk usage, IOPS, network traffic, and object states. It can be used to identify the root cause of performance problems, such as disk contention, network congestion, or object failures. It provides a quick and easy way to identify the root cause of performance issues, making it a useful tool for troubleshooting vSAN clusters.

This is explained in VMware vSAN documentation in the section "vSAN Tools and Troubleshooting" Reference:

he correct answers are B and E. Changing the failure tolerance method and enabling object checksum (from checksum disabled) both result in a component resync. When the failure tolerance method is changed, the components of the objects stored on the vSAN datastore need to be rebuilt in the new format, which requires a component resync. Similarly, when object checksum is enabled, the components of the objects stored on the vSAN datastore need to be rebuilt in order to enable checksum.

You can find this information in the VMware vSAN 6.7 Documentation, in the section titled 'Storage Policy Rules':

vSAN 2-Node Cluster Guide | VMware

VCP-DCV for vSphere 7.x (Exam 2V0-21.20) Official Cert Guide, 4th ...

vSAN 70u3 Proof of Concept Guide | VMware

Quickstart is a configuration tool that guides vSAN administrators through the process of creating a vSAN cluster from scratch. It is available in vCenter Server 6.0 U2 and later versions. Therefore, before using Quickstart, it is important to ensure that all hosts are running 6.0 U2 or later. The hosts should not have any existing vSAN or network configurations, to avoid any conflicts with the new vSAN cluster being deployed. This is explained in VMware vSAN 6.7 documentation in the section "Creating a vSAN Cluster using the Quickstart Configuration" Reference: