In a stretched vSAN cluster, how is Read Locality established after fail over to the secondary site?
- A . 100% of the reads comes from vSAN hosts on the local site
- B . 50% of the reads comes from vSAN hosts on the local site
- C . 100% of the reads comes from vSAN hosts on the remote site
- D . 50% of the reads comes from vSAN hosts on the remote site
C
Explanation:
In the event of a failure or maintenance event, the virtual machine is restarted on the remote site. The 100% rule continues in the event of a failure. This means that the virtual machine will now read from the replica on the site to which it has failed over. One consideration is that there is no cached data on this site, so cache will need to warm for the virtual machine to achieve its previous levels of performance.
In a vSAN stretched cluster, which value must be set in the vSAN policy if there is no requirement for data mirroring across sites?
- A . SFTT = 0
- B . SFTT = 1
- C . PFTT = 1
- D . PFTT = 0
D
Explanation:
PFTT can be seen as “site failures”, and you can always only tolerate 1 at most. SFTT can be seen as host failures, and you can define this between 0 and 3 https://www.yellow-bricks.com/2018/03/19/vsan-stretched-cluster-pftt-and-sftt-what-happens-when-a-full-site-fails-and-multiple-hosts-fail/
Reference: https://www.delltechnologies.com/asset/en-us/products/converged-infrastructure/technical-support/h15275-vxrail-planning-guide-virtual-san-stretched-cluster.pdf (5)
An architect needs to automate an infrastructure that supports VMware Horizon as well as VMware Tanzu.
Which solution mandates the use of VMware vSAN?
- A . VMware Cloud Foundation
- B . VMware Horizon
- C . VMware Tanzu
- D . VMware vRealize Automation
A
Explanation:
https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10/vcf-deploy/GUID-E493608B-D4B6-4C98-96CA-5D2D723ACE55.html
Reference: https://www.vmware.com/products/vrealize-automation.html
An administrator is setting up vSAN file services on a vSAN cluster.
Which two security policies on the distributed port groups are automatically enabled in the process? (Choose two.)
- A . Forged Transmits
- B . Promiscuous Mode
- C . DVFiltering
- D . Jumbo Frames
- E . MacLearning
A, E
Explanation:
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan.doc/GUID-CA9CF043-9434-454E-86E7-DCA9AD9B0C09.html MacLearning and Forged Transmits are enabled as part of the vSAN File Services enablement process for a provided DVS port group.
Reference: https://www.yellow-bricks.com/2020/04/15/vsan-file-services-considerations/
An administrator has been tasked to reboot a node in an encrypted vSAN cluster. The vSAN disk groups on that node become locked after rebooting the node.
Which step should be performed to exit the locked state?
- A . Manually replace the Host Encryption Key (HEK) of each affected host.
- B . Restore the communication with the KMS server, and re-establish the trust relationship.
- C . Replace the caching device in each affected disk group.
- D . Run /etc/init.d/vsanvpd restart to rescan the VASA providers.
B
Explanation:
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-monitoring.doc/GUID-084B3888-499F-4CD0-8954-A149560B1534.html
Reference: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.vsan-monitoring.doc/GUID-084B3888-499F-4CD0-8954-A149560B1534.html
A customer is planning to deploy a vSAN cluster to host their in-house distributed ERP system.
The hardware specifications for their server nodes include:
* 2 x Intel Xeon CPU E5-2697 v3 @ 2.60GHz
* 1TB memory
Which boot device is supported for the vSAN ESXi nodes for this customer?
- A . A 16GB single-level cell (SLC) SATADOM device must be used.
- B . A 4GB USB or SD device must be used.
- C . A 16GB multiple-level cell (MLC) SATADOM device must be used.
- D . ESXi Hosts must boot from a PMEM device.
A
Explanation:
If the memory of the ESXi host has 512 GB of memory or less, you can boot the host from a USB, SD, or SATADOM device. If the memory of the ESXi host has more than 512 GB, consider the following guidelines. • You can boot the host from a SATADOM or disk device with a size of at least 16 GB. When you use a SATADOM device, use a single-level cell (SLC) device.
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-B09CE19D-A3F6-408C-AE69-35F65CBE66E1.html
A company hosts a vSAN 7 stretched cluster for all development workloads. The original sizing of a maximum of 250 concurrent workloads in the vSAN cluster is no longer sufficient and needs to increase to at least 500 concurrent workloads within the next six months.
To meet this demand, the original 8-node (4-4-1) cluster has recently been expanded to 16 nodes (8-8-1).
Which three additional steps should the administrator take to support the current growth plans while minimizing the amount of resources required at the witness site? (Choose three.)
- A . Add the new vSAN witness appliance to vCenter Server.
- B . Deploy a new large vSAN witness appliance at the witness site.
- C . Configure the vSAN stretched cluster to use the new vSAN witness.
- D . Deploy a new extra large vSAN witness appliance at the witness site.
- E . Upgrade the vSAN stretched cluster to vSAN 7.0 U1.
- F . Configure the new vSAN witness as a shared witness appliance.
ABC
Explanation:
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-05C1737A-5FBA-4AEE-BDB8-3BF5DE569E0A.html
Upon investigating a workload performance issue, a vSAN administrator observed a high backend IOPs on a vSAN cluster.
Which two causes explain this behavior? (Choose two.)
- A . The cluster DRS threshold has been set to Aggressive.
- B . There is a vSAN node failure.
- C . The vSAN Resync throttling is enabled.
- D . The object repair timer value has been increased.
- E . The vSAN policy protection level has changed from FTT=0 to FTT=1.
B, E
Explanation:
Reference: https://core.vmware.com/resource/troubleshooting-vsan-performance#_Toc536646878
An administrator wants to check the performance metrics for the workloads and their virtual disks that are running on a vSAN cluster, but no statistical charts are displayed in the vSphere client.
Why is this behavior being seen?
- A . vSAN network diagnostic mode is not enabled.
- B . vSAN proactive tests haven’t been run yet.
- C . vSAN performance service is turned off.
- D . vSAN performance verbose mode is not enabled.
C
Explanation:
: Some tools allow for measuring latency peaks. This unfortunately isn’t ideal, as it can unfairly represent statistical outliers, which may very well occur when there is little to no I/O activity. The best way to understand the actual behavior of VM and application latencies is to observe in time based performance graphs. Depending on the level of detail, you may need to measure at the individual VMDK level. Become familiar with these graphs to determine what is normal, and what is not for that given application. This is where you can use built-in functionality of vCenter and the vSAN performance service metrics to gather this information.
Reference:
https://core.vmware.com/resource/troubleshooting-vsan-performance#_Toc536646873
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-monitoring.doc/GUID-EF27701E-7BAC-4E76-9D2F-E1C58CAAB06D.html
During a maintenance action on a vSAN node, a vSAN administrator noticed that the default repair delay time is about to be reached.
Which two commands must be run to extend the time? (Choose two.)
- A . /etc/init.d/vsanmgmtd restart
- B . esxcli system settings advanced set -o /VSAN/ClomRepairDelay -i 50
- C . esxcli system settings advanced set -o /VSAN/ClomRepairDelay -i 80
- D . /etc/init.d/clomd restart
- E . /etc/init.d/vsanobserver restart
C, D
Explanation:
Reference: https://kb.vmware.com/s/article/2075456
An administrator wants to deploy a desktop and application virtualization solution on top of vSAN.
Which VMware product should the administrator install?
- A . VMware Dynamic Environment Manager
- B . VMware Horizon Apps
- C . VMware Workspace One Access
- D . VMware Horizon
D
Explanation:
Reference: https://www.vmware.com/products/horizon/horizon-vsan.html
An administrator has been tasked with enabling encryption for existing virtual machines on a vSAN cluster.
Which three prerequisites must be satisfied before completing the task? (Choose three.)
- A . Create an encryption storage policy
- B . Enable Data-In-Transit encryption first
- C . Enable that the virtual machines are powered on
- D . Verify if a role with privilege “Cryptographic operations.Encrypt new” is assigned
- E . Verify if a role with privilege “Cryptographic operations.Migrate” is assigned
- F . Establish a trusted connection with the KMS
A, D, F
Explanation:
Because Before you can create encrypted virtual machines, you must create an encryption storage policy. You create the storage policy once, and assign it each time you encrypt a virtual machine or virtual disk.
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.security.doc/GUID-7DE1ED8F-880B-421E-B27B-5AAA58454AFA.html
Upon checking the latency goal under vSAN performance diagnostics, the vSAN Administrator sees this message displayed:
The increase in latency in the vSAN stack might be beyond expected limits.
Which two root causes can be identified to help remediate the issue? (Choose two.)
- A . vSAN VMKemel portgroup is configured with the “Route based on IP hash” teaming policy
- B . vSAN encryption is enabled
- C . Large packet losses and retransmissions on the network layer
- D . Incorrect sizing of the disk groups capacity disks
- E . One or more disk groups are congested
C, E
Explanation:
Reference: https://kb.vmware.com/s/article/2150018
An architect is designing for a production vSAN cluster, and the customer introduced these requirements related to File Services: A minimum of 12 files shares. 30TB NFS capacity to mount workload VMs.
What should be the architect’s recommendations?
- A . Point out the risks regarding putting the hosts in maintenance mode in terms of FSVM.
- B . Confirm on all of the requirements and move forward with the physical design.
- C . Raise concerns regarding support when running VMs on an NFS share as risk.
- D . Highlight the required number of nodes required for the vSAN cluster as a constraint.
D
Explanation:
An administrator has received an alert indicating that a single capacity device is close to failing within the production vSAN Cluster. The administrator must now complete preemptive maintenance on the vSAN Cluster without impacting the availability of workloads or vSAN File Services.
The following information is known about the vSAN Cluster:
* vSAN 7.x Cluster
* vSAN node count: 8
* De-Duplication and Compression: Enabled.
* Encryption: Disabled
* Current Utilization: 45%
* Disk Groups: 2
* Devices per node: 2 x 400 GB SSD, 6 x 1.8 TB SSD
Which three steps should the administrator take to successfully complete the task? (Choose three.)
- A . Remove the affected Disk Group from the vSAN Cluster, and choose Full Data Migration.
- B . Replace the failed disk with a storage device that is identical in class and capacity.
- C . Remove the affected Disk Group from the vSAN Cluster, and choose No Data Migration.
- D . Replace the failed disk with a storage device that is identical in class but smaller in capacity.
- E . Put the affected vSAN host into maintenance mode to physically replace the storage device.
- F . Remove the affected Disk from the Disk Group, and choose Full Data Migration.
BEF
Explanation:
If you upgrade the capacity device, verify the following requirements:
– Verify that the cluster contains enough space to migrate the data from the capacity device.
– Place the host in maintenance mode. See Place a Member of Virtual SAN Cluster in Maintenance Mode.
"Select the flash capacity device or magnetic disk, and click Remove selected disk(s) from disk group."
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-4E3390C1-6C50-49E5-AEB6-C9BC037979A1.html
A 30-minute power maintenance window has been approved on Sunday. Due to a delay, the maintenance took 20 minutes longer to finish.
During this time, the vSAN administrator noticed that one of the clusters nodes was affected by a power shortage, as it was connected to an affected power source. The default vSAN storage policy has been applied.
What will be the status of the vSAN objects on the affected host immediately after it is recovered?
- A . The cluster will be partitioned and the vSAN host will need to be rejoined.
- B . A rebuild of the affected objects will occur.
- C . All objects will remain accessible.
- D . All objects on the affected host will be lost.
C
Explanation:
Default Storage Policy is FTT=1. https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.virtualsan.doc/GUID-C228168F-6807-4C2A-9D74-E584CAF49A2A.html
Due to the success of the recently deployed developer-only private cloud solution, a company has a new requirement to at least double the usable capacity in their all-flash vSAN cluster.
The vSAN cluster is deployed into a co-located datacenter that is owned by a third-party hosting company. The hosting company charges a fixed monthly cost for rack space and power consumption. The service owner has been given a limited budget for additional hardware purchases, but not for on-going co-location costs.
The current vSAN cluster has the following configuration:
* 10 vSAN Nodes with 2 CPUs (20 cores), 512 GB RAM
* 1 Disk Group per vSAN node
– 1 x 400 GB
– 4 x 1.8 TB
* De-duplication and Compression is enabled.
* vSAN Capacity is currently:
– Total: 72 TB
– Usable: ~40 TB (FTT1/RAID1) and ~60 TB (FTT1/RAID5).
As a result of any action taken, the service owner would like to ensure that overall availability of the vSAN cluster is increased.
Which two recommendations meet the requirement to increase capacity while maintaining service availability? (Choose two.)
- A . Install an additional 400 GB SSD and 4 x 1.8 TB SSDs per vSAN node.
- B . Update the existing Disk Group, and claim the newly installed drives for each node.
- C . Create a new Disk Group, and claim the newly installed cache and capacity SSD drives for each node.
- D . Install an additional 3 x 1.8 TB SSDs per vSAN node.
- E . Replace existing SSDs with an 800 GB SSD and 4 x 3.8 TB SSDs per vSAN node.
AC
Explanation:
Option A meets the requirement by adding additional SSDs to each vSAN node, which will increase the total capacity of the vSAN cluster. By installing the same type of SSDs that are currently being used, this option will also maintain the same level of service availability.
Option C meets the requirement by creating a new disk group and adding the newly installed SSDs to it. By creating a new disk group, it will allow you to use the new SSDs as a separate cache and capacity tier, which will improve the cluster’s performance and increase the usable capacity.
After a vSAN Witness Appliance network configuration, the vSAN administrator notices that vSAN traffic flows from vmk0 (Management Traffic) rather than vmk1 (vSAN Traffic).
Which step should be taken to resolve this issue?
- A . Configure vmk0 with IP address on the same range as that of vmk1.
- B . Tag the vmk0 for vSAN traffic.
- C . Configure vmk1 with IP address on the different network than that of vmk0.
- D . Tag the vmk1 for Witness traffic.
C
Explanation:
The vmk1 interface cannot be configured with an IP address on the same range as that of vmk0. This is because Management traffic and vSAN traffic use the default TCP/IP stack. If both vmk0 and vmk1 are configured on the same range, a multihoming condition will occur and vSAN traffic will flow from vmk0, rather than vmk1.
A customer has upgraded to vSAN 7, but there is still an existing legacy host which must be removed from the vSAN cluster.
Which three steps must an administrator take to successfully remove this host from the vSAN cluster? (Choose three.)
- A . Place the host in maintenance mode with Ensure Accessibility
- B . Disconnect from vCenter Server
- C . Place the host in maintenance mode with Full Data migration
- D . Place the host in maintenance mode with no data migration
- E . Remove from vSAN cluster
- F . Delete the disk group(s) on the legacy host
C, E, F
Explanation:
Reference: http://www.vexpertconsultancy.com/2019/06/step-by-step-remove-a-node-permanently-from-a-vsan-cluster/
During a vSAN design workshop, an architect collected these customer requirements:
* Leverage vSAN storage policies with Erasure Coding.
* Enable Deduplication and Compression.
* Use the minimum number of hosts in the cluster.
* Maintain full storage policy compliance when two nodes are down.
Which vSAN cluster design meets the customer’s requirements?
- A . Five nodes All-Flash vSAN cluster
- B . Six nodes All-Flash vSAN cluster
- C . Six nodes Hybrid vSAN cluster
- D . Five nodes Hybrid vSAN cluster
B
Explanation:
https://blogs.vmware.com/virtualblocks/2018/05/24/vsan-deployment-considerations/
Reference: https://www.vmware.com/files/pdf/products/vsan/vmware-vsan-62-space-efficiency-
technologies.pdf