The IT Team recently implemented a Unified Communication Service to provide conferencing for the organization. The UCS Application server is running from a virtual machine named VM1-UCS. Due to the nature of the UCS. the traffic for VM1-UCS has a higher Class of Service (CoS) demand.
In order to meet demand bandwidth for VM1 hosting the UCS. you been have given the task to improve performance by isolating the traffic and configuring CoS for this VM.
Your first task is to connect VM1-UCS to the distributed port group. UCS-Portgroup.
Your second task is to tag and mark the traffic for VM1-UCS with the following parameters:
• Name: UCS Network Traffic
• CoS Value: 4
• DSCP Value: 34
• Traffic Direction: Ingress/Egress
• Traffic Qualifier: System Traffic - Virtual Machine
The IT Team noticed that some of the parameter where not available on the distributed switch. Troubleshoot why these settings are missing and fix it.
Answer is in the explanation below.
Reference / correct answer:
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Question 2
The company's IT strategy is to adopt innovative and emerging technologies such as software-defined storage solution. The IT team has decided to run their business-critical workloads on an all-flash Virtual SAN (vSAN) as it provides excellent performance.
The IT team has purchased servers that are compatible with vSAN. However, all the solid-state drives (SSD) in the servers are shown incorrectly as hard-disk drives (HDD) instead.
In addition, some of the solid-state drives (SSD) will be used for other purposes instead of vSAN and should not be part of the vSAN cluster. These are the requirements for the vSAN cluster:
•In each server, use the 3GB SSD as the cache tier and the 11GB SSD as the capacity tier
• As a result the vSAN cluster will use a total of six SSDs (three SSDs for caching and three SSDs for capacity
• Ensure all the disks that will be used for vSAN are shown correctly as SSDs
• Provide storage savings by using deduplication and compression.
Next, the IT team wants to improve the performance and availability of the business-critical workloads on the vSAN-datastore.
Ensure the following configurations will be applied on existing and new workloads located on vSAN-datastore:
The new configurations should be applied by default.
You may create new storage policy but do not edit the default vSAN storage policy as it may be used by other vSAN clusters in the future. Name the policy "New vSAN Default'.
Nate-. All tasks should be executed in PROD-A host cluster.
Answer is in the explanation below.
Reference / correct answer:
seethesolutionbelow:
VMware vSphere ESXi can use locally attached SSDs (Solid State Disk) and flash devices in multiple ways. Since SSDs offer much higher throughput and much lower latency than traditional magnetic hard disks the benefits are clear. While offering lower throughput and higher latency, flash devices such as USB or SATADOM can also be appropriate for some use cases. The potential drawback to using SSDs and flash device storage is that the endurance can be significantly less than traditional magnetic disks and it can vary based on the workload type as well as factors such as the drive capacity, underlying flash technology, etc.
This KB outlines the minimum SSD and flash device recommendations based on different technologies and use case scenarios.
SSD and Flash Device Use Cases
A non-exhaustive survey of various usage models in vSphere environment are listed below.
SSD Endurance Criteria
The flash industry often uses Tera Bytes Written (TBW) as a benchmark for SSD endurance. TBW is the number of terabytes that can be written to the device over its useful life. Most devices have distinct TBW ratings for sequential and random IO workloads, with the latter being much lower due to Write Amplification Factor (WAF) (defined below). Other measures of endurance commonly used are DWPD (Drive Writes Per Day) and P/E (Program/Erase) cycles.
Conversion formulas are provided here:
WAF is a measure of the induced writes caused by inherent properties of flash technology. Due to the difference between the storage block size (512 bytes), the flash cell size (typically 4KiB or 8KiB bytes) and the minimum flash erase size of many cells one write can force a number of induced writes due to copies, garbage collection, etc. For sequential workloads typical WAFs fall in the range of single digits while for random workloads WAFs can approach or even exceed 100. Table 1 contains workload characterization for the various workloads excepting the Datastore and vSphere Flash Read Cache workloads which depend on the characteristics of the Virtual Machines workloads being run and thus cannot be characterized here. A WAF from the table can be used with the above P/E to TBW formula.
Question 3
You have been asked to create a new datastore for the Production cluster; however, the ESXi host esxi02a is not able to add the datastore. Your storage team has determined that there is nothing incorrect with the storage presentation.
Troubleshoot why host esxi02a is not able to create the datastore. Add the datastore to the host once the proper configuration has been applied, and then reboot the host!
Use the following information to complete this task;
• ESXi host: esxi02a
• Datastore Name: new_datastore
• Datastore target: iSCSI Target
• Datastore LUN: 4
• Reboot the host
Answer is in the explanation below.
Reference / correct answer:
Seethesolutionbelow:
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