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VMware Specialist: vSAN 6.x Badge Exam 試験

最新更新時間: 2019/07/06,合計124問。

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Question No : 1
Which three of the listed items are monitored by the vSAN performance service? (Choose three.)

正解:
Explanation:
A:

Question No : 2
When using vSAN in a two-node direct connect configuration, how do data nodes communicate with the vSAN witness appliance?

正解:
Explanation:
Traditional vSAN 2 Node configurations require connectivity between the vSAN tagged VMkernel ports, and the vSAN Witness Appliance’s VSAN tagged VMkernel port. 2 Node Direct Connect Witness Traffic Separation provides the ability to directly connect vSAN data nodes in a 2 Node configuration. Traffic destined for the Witness host can be tagged on an alternative interface from the directly connected vSAN tagged interface.

Question No : 3
A six-node all-flash vSAN cluster has been deployed. Deduplication and compression are enabled. All virtual machines are produced by policies with the rule Primary level of failures to tolerate set to 1.
How is a vSAN disk group impacted when the cache device belonging to that disk group fails?

正解:
Explanation:
When a flash caching device fails, vSAN evaluates the accessibility of the objects on the disk group that contains the cache device, and rebuilds them on another host if possible and the Primary level of failures to tolerate is set to 1 or more.

Question No : 4
vSAN storage policies can be created from which three of the listed vSAN rules? (Choose three.)

正解:
Explanation:



B: Checksum vSAN 6.2 includes End-to-End Software checksum to help avoid data integrity issues that may arise in the underlying disks. By default, checksum is enabled in version 6.2 but can be explicitly disabled via a storage policy setting. Software checksum can be disabled by completing the following procedure.

Question No : 5
Using the vSphere Web Client, re-create the disk group.
D. 1. Physically replace the failed disk and vSAN automatically takes of the rest of the process.

正解: C
Explanation:
When a flash device failure occurs, before physically removing the device from a host, you must decommission the device from Virtual SAN. The decommission process performs a number of operations in order to discard disk group memberships, deletes partitions and remove stale data from all disks.
How to do it. Flash Device Decommission Procedure from the vSphere Web Client Log on to the vSphere Web Client Navigate to the Hosts and Clusters view and select the cluster object Go to the manage tab and select Disk management under the Virtual SAN section Select the disk group with the failed flash device Select the failed flash device and click the delete button
References:https://blogs.vmware.com/storage/2014/12/02/vmware-virtual-san-operations-replacing-disk­devices/

Question No : 6
Which are two functions of software checksums in a vSAN environment? (Choose two.)

正解:
Explanation:
Software checksums which will perform the following checks:
- Write failures to disks
- Network copy failures
- Checksum failures C will fetch data from another copy.
- Disk Scrubbing will run in the background
- Enables additional level of data integrity
- Automatically detects and solve silent disk errors
References: https://www.vladan.fr/vmware-vsan-6-2/

Question No : 7
Which of the listed three vSAN features provide space efficiency? (Choose three.)

正解:
Explanation:
One of the Space Efficiency features of Virtual SAN 6.2 that is available for both All-Flash and Hybrid configurations, is the introduction of Sparse Virtual Swap files. Swap files on Virtual SAN by default, are created with the .vswp 100% reserved. In a thin provisioned/guaranteed capacity perspective, it could be said that they are effectively Lazy Zeroed Thick (LZT).
RAID-5/6 erasure coding is a space efficiency feature optimized for all-flash configurations of Virtual SAN

Question No : 8
Which three virtual machine file types are contained in a VM home namespace object in a vSAN cluster? (Choose three.)

正解:
Explanation:
The virtual machine home directory where all virtual machine configuration files are stored, such as .vmx, log files, vmdks, and snapshot delta description files. The VM Home Namespace is where we store all the virtual machine configuration files, such as the .vmx, .log, digest files, memory snapshots, etc.
The .nvram file: this is the file that stores the state of the virtual machine's BIOS. This file is stored in the same directory as the .vmx file.
Reference: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-1D8956A2­3F46-49C8-9231-38F3A9D09A0F.html

Question No : 9
Which two are vSAN networking best practices? (Choose two.)

正解:
Explanation:
A: If you use a shared 10-GbE network adapter, place the vSAN traffic on a distributed switch and configure Network I/O Control to guarantee bandwidth to vSAN.
D: For hybrid configurations, dedicate at least 1-GbE physical network adapter. Place vSAN traffic on a dedicated or shared 10-GbE physical adapter for best networking performance.
References: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-7BDE36E1­2F06-4699-8D83-3694A0E638B5.html

Question No : 10
Which two statements are true about VSAN deduplication and compression? (Choose two.)

正解:
Explanation:
You can enable deduplication and compression as a cluster-wide setting, but they are applied on a disk group basis. The vSAN deduplication block size is 4K fixed.
References: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-3D2D80CC­444E-454E-9B8B-25C3F620EFED.html https://blogs.vmware.com/virtualblocks/2017/11/29/vsan-operations-adding-removing-drives-deduplication­compression-enabled/

Question No : 11
Which three objects that belong to virtual machines are contained in a vSAN datastore? (Choose three.)

正解:
Explanation:
Reference: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-1D8956A2­3F46-49C8-9231-38F3A9D09A0F.html

Question No : 12
Storage policies can be based on which two types of rules? (Choose two.)

正解:
Explanation:
References: https://www.virtualizationhowto.com/2017/10/using-vmware-vm-storage-policies/

Question No : 13
With the addition of local protection to vSAN stretched clusters, which factors determine the maximum level of object protection?

正解:

Question No : 14
Consider the following scenario in a vSAN cluster that contains six hosts:
- All virtual machines are assigned the vSAN Default Storage Policy, which has not been modified.
- Deduplication and compression are not enabled.
- Every vSAN disk group in the cluster contains one cache device and five capacity devices
What happens when a capacity devices transmits SCSI sense code errors and fails?

正解:

Question No : 15
In a vSAN stretched cluster with Primary level to tolerate set to 1 and Secondary level of failure to tolerate set to 2, what is the maximum amount of space that a 100GB virtual disk could consume without any other policy rules set?

正解:
Explanation:
References: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-08911FD3­2462-4C1C-AE81-0D4DBC8F7990.html

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