How many consecutive heartbeats of communication must be lost between master and the witness host for the witness host to be deemed to have failed?
If communication is lost for 5 consecutive heartbeats (5 seconds) between the master and the Witness, the Witness is deemed to have failed.Explanation:https://storagehub.vmware.com/export_to_pdf/vsan-stretched-cluster-2-node-guide, page 51
Which statement accurately describes cache tier sizing guidance for an all-flash vSAN cluster that will be supporting write-intensive workloads?
A. Multiple disk groups with larger cache devices should be used.
B. Multiple disk groups with two cache devices per disk group should be used.
C. A single disk group with a small cache device should be used to minimize de-staging write amplification.
D. Two cache devices per disk group should be configured for redundancy.
A cache tier device experiences a permanent disk failure.
Which of the below represents a valid process for replacing the failed disk?
A. 1. The hot spare disk replaces the failed disk immediately.2. Physically replace the failed disk.
B. 1. Using the vSphere Web Client, replace the failed disk with the hot spare disk.2. Physically replace the failed disk.
C. 1. Using the vSphere Web Client, delete the failed disk from the vSAN cluster.2. Physically replace the failed disk.3. 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.
When a flash device failure occurs, before physically removing the device from a host, you must decommission the device from Virtual SAN. The decommission processperforms 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 tothe 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 buttonExplanation:https://blogs.vmware.com/storage/2014/12/02/vmware-virtual-san-operations-replacing-disk-devices/
Given a limited maximum queue depth, what can an administrator do to potentially improve performance when deploying vSAN iSCSI volumes?
A. Utilize multiple iSCSI targets.
B. Change the erasure coding to RAID-6
C. Adjust the maximum iSCSI queue depth values
D. Configure multiple VMkernel ports
Today if you are noticing that your device queues are constantly bumping up to their maximum limits, it would be recommended to increase the Device/LUN depth and use SIOC to help mitigate any potential noisy neighbor problem.Explanation:https://blogs.vmware.com/vsphere/2012/07/troubleshooting-storage-performance-in-vsphere-part-5-storage-queues.html
When can a change to a storage policy be made?
A. Only when creating a new policy, because policies become protected objects after creation.
B. A change to SPBM policies can be made at any time.
C. A change to a policy can be made at any time, but only if there are no VMs using that policy.
D. After shutting down any VMs using that policy to ensure data integrity.
Which VMware-recommended tool provides specific information on the best strategy for a vSAN deployment?
A. vSAN VIP Assessment Tool
B. vSAN TCO and Sizing Calculator
C. vSAN Health Check UI
D. vSAN ReadyNode Configurator
vSAN ReadyNode Configurator
Selecting a vSAN ReadyNode is simple. Choose the vSAN version you want to deploy,pick a ReadyNode profile based on your specific needs, select your preferred server vendor, and then pick one of the available models.
Note: vSAN ReadyNode are x86 servers, available from all the leading server vendors, that have been pre-configured, tested and certified for VMware Hyper-Converged InfrastructureSoftware. Each ReadyNode is optimally configured for vSAN with the required amount of CPU, memory, network, I/O controllers and storage (SSDs, HDDs or flash devices).
Some ReadyNode are availablewith additional options aimed at simplifying purchasing, deployment, and support. These options are only available for select server vendors and ReadyNode models:
Which three virtual machine file types are contained in a VM home namespace object in a vSAN cluster? (Choose three.)
The virtual machine home directory where all virtual machineconfiguration 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.Explanation: