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Questions and Answers

What is the recommended percentage of slack space to consider when sizing for a production environment?

  • 35 percent
  • 25 percent
  • 30 percent (correct)
  • 15 percent

    • Which factor is NOT included in calculating the vSAN metadata overhead?

  • On-disk format version
  • Space for checksum
  • Standard overhead percentage
  • Space reserved for deduplication (correct)

    • What overhead does the vSAN design and sizing guide state for formatting if deduplication is not used?

  • 5 percent
  • 1 percent (correct)
  • 10 percent
  • 15 percent

    • Which storage policy is associated with the highest failure tolerance under certain conditions?

    <p>FTT=2</p> Signup and view all the answers

    In stretched vSAN clusters, which characteristic is essential for the high-bandwidth connections between availability zones?

    <p>High bandwidth (10Gbps)</p> Signup and view all the answers

    What is a key feature of vSAN ESA that differentiates it from traditional vSAN OSA?

    <p>Single-tier architecture that supports only NVMe disks</p> Signup and view all the answers

    Which function does the vSAN ESA Log-Structured File System (LFS) perform during the I/O process?

    <p>Packages smaller writes into larger I/O blocks before writing</p> Signup and view all the answers

    What is NOT a benefit of using vSAN ESA's storage pools?

    <p>Increased I/O flow due to multiple caching layers</p> Signup and view all the answers

    In the context of vSAN ESA, how does data compression during ingestion benefit the system?

    <p>Reduces network traffic and CPU resource usage</p> Signup and view all the answers

    Which characteristic defines the maximum number of disks in a vSAN ESA storage pool?

    <p>Limited by the number of NVMe disk slots in the host</p> Signup and view all the answers

    What role does encryption play in the vSAN ESA I/O process?

    <p>It is applied at ingestion to optimize CPU usage</p> Signup and view all the answers

    How does the vSAN ESA achieve high-performance snapshots?

    <p>Through its Log-Structured File System characteristics</p> Signup and view all the answers

    Which aspect of vSAN ESA storage pools enhances the efficiency of data management?

    <p>The independent nature of each disk simplifies the I/O process</p> Signup and view all the answers

    What is the primary function of storage policies in vSAN?

    <p>To categorize storage based on desired levels of service</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required for implementing Failures to Tolerate (FTT) policies?

    <p>3</p> Signup and view all the answers

    Which of the following components is considered an object in vSAN?

    <p>Flat.VMDK file</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required for a FTT of 1 using Raid-5?

    <p>4 hosts</p> Signup and view all the answers

    How does RAID-1 policy apply to VMs in vSAN?

    <p>It mirrors copies of the Flat.VMDK file</p> Signup and view all the answers

    How does deduplication function in data storage?

    <p>It reduces redundant data blocks to a single instance.</p> Signup and view all the answers

    What is a key advantage of policy-driven object-based storage?

    <p>Ability to treat different types of objects differently</p> Signup and view all the answers

    Which storage policy requires an all-flash architecture?

    <p>Deduplication and compression</p> Signup and view all the answers

    What is the purpose of using compression in data storage?

    <p>To remove additional redundant data within each data block.</p> Signup and view all the answers

    What does SPBM stand for in the context of vSAN?

    <p>Storage-Based Policy Management</p> Signup and view all the answers

    Which statement about object-based fault tolerance in vSAN is true?

    <p>It protects data through object-based redundancy.</p> Signup and view all the answers

    For a FTT of 2, how many ESXi hosts are required for Raid-6?

    <p>6 hosts</p> Signup and view all the answers

    What is a potential consequence of not having enough ESXi hosts configured in vSAN?

    <p>Impaired fault tolerance methods</p> Signup and view all the answers

    Which raid configuration offers the highest fault tolerance?

    <p>Raid-6</p> Signup and view all the answers

    What is the storage equivalence for Raid-1 with a FTT of 2?

    <p>5 hosts, 300 GB</p> Signup and view all the answers

    How are object policies defined in vSAN?

    <p>By a set of rules tailored to VMs</p> Signup and view all the answers

    What is the default configuration for Failures to Tolerate in vSAN?

    <p>1 failure to tolerate</p> Signup and view all the answers

    Which of the following is not a tab in the storage policy interface?

    <p>VM Security tab</p> Signup and view all the answers

    What happens first during the process of deduplication and compression?

    <p>Deduplication is performed.</p> Signup and view all the answers

    How many hosts are required at a minimum for Raid-1 with a FTT of 0?

    <p>3 hosts</p> Signup and view all the answers

    What is the primary benefit of using deduplication at the disk group level with a 4K block size?

    <p>It provides a good balance of efficiency and performance.</p> Signup and view all the answers

    When does vSAN store data in a compressed format?

    <p>When a unique 4K block can be reduced to 2K or less.</p> Signup and view all the answers

    Which of the following steps is NOT part of the existing cluster deduplication and compression guideline?

    <p>Increase the block size to 8K.</p> Signup and view all the answers

    What is a key characteristic of vSAN ESA?

    <p>It delivers up to four-times better performance with NVMe technology.</p> Signup and view all the answers

    Which type of hardware is NOT supported by vSAN ESA?

    <p>Legacy SATA HDD devices.</p> Signup and view all the answers

    What does vSAN ESA build on?

    <p>Existing vSAN technology.</p> Signup and view all the answers

    Which of the following statements about vSAN ESA is true?

    <p>Only greenfield deployments are supported.</p> Signup and view all the answers

    What overhead does vSAN consider when storing compressed data?

    <p>Additional compute resource and allocation map overhead.</p> Signup and view all the answers

    Which of the following is a feature of vSAN ESA?

    <p>No in place upgrades from older versions.</p> Signup and view all the answers

    What is the relationship between deduplication and compression in vSAN?

    <p>Compression is applied after deduplication.</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required for a Failures to Tolerate (FTT) of 1 using Raid-1?

    <p>3 hosts</p> Signup and view all the answers

    What does deduplication do in a vSAN environment?

    <p>Stores only a single instance of redundant data</p> Signup and view all the answers

    Which RAID configuration requires a minimum of 6 hosts?

    <p>Raid-6</p> Signup and view all the answers

    How many storage components are necessary for a Raid-5 configuration with FTT of 1?

    <p>4 components</p> Signup and view all the answers

    What is the main benefit of enabling both deduplication and compression in a vSAN architecture?

    <p>Significantly reduce the amount of space required for storage</p> Signup and view all the answers

    Which aspect of deduplication is NOT applicable when there are redundant blocks across multiple disk groups?

    <p>No deduplication occurs across disk group boundaries</p> Signup and view all the answers

    In a vSAN environment, which storage policy requires the use of an all-flash architecture?

    <p>Deduplication and compression policy</p> Signup and view all the answers

    What is a primary advantage of using vSAN Max in cloud native environments?

    <p>It keeps compute and storage independent for better scaling.</p> Signup and view all the answers

    Which factor is essential when considering CPU requirements for vSAN?

    <p>10% CPU overhead for vSAN allocation.</p> Signup and view all the answers

    What is a key benefit of using vSAN Max for storage management?

    <p>It provides a consistent management experience similar to vSAN HCI.</p> Signup and view all the answers

    What is the minimum memory requirement per host for full vSAN implementation?

    <p>32GB</p> Signup and view all the answers

    Which storage architecture is considered to provide better performance in vSAN environments?

    <p>NVMe Cache/SAS configuration.</p> Signup and view all the answers

    What must be considered before removing a host from a vSAN ESA cluster?

    <p>The default storage policy is based on the number of hosts.</p> Signup and view all the answers

    Which of the following is NOT a limitation of using vSAN Max within VMware Cloud Foundation?

    <p>Only supports stretched cluster topology.</p> Signup and view all the answers

    How many terabytes are supported per vSAN Max host?

    <p>From 20 to 360 TB.</p> Signup and view all the answers

    What is the primary storage option for VMware Cloud Foundation 5.2?

    <p>Both aggregated vSAN HCI and disaggregated vSAN Max.</p> Signup and view all the answers

    What is the maximum number of disks supported per vSAN host in vSAN OSA?

    <p>40 disks</p> Signup and view all the answers

    What happens when a host is removed from a vSAN ESA cluster?

    <p>The default storage policy becomes noncompliant.</p> Signup and view all the answers

    Which component is unique to the disk structure of vSAN ESA?

    <p>Storage pools</p> Signup and view all the answers

    How does the encryption method differ between vSAN OSA and vSAN ESA?

    <p>One DEK per disk in OSA and per cluster in ESA</p> Signup and view all the answers

    Which statement is true regarding storage clusters in VMware Cloud Foundation?

    <p>Aggregated and disaggregated clusters can be preferred based on flexibility.</p> Signup and view all the answers

    Which statement is true regarding compression settings in vSAN ESA?

    <p>Compression is off by default and applied individually</p> Signup and view all the answers

    In the context of using vSAN ESA, which statement is accurate about policy compliance?

    <p>Removing a host can create policy noncompliance.</p> Signup and view all the answers

    What is a feature of vSAN Max in VMware Cloud Foundation?

    <p>Can provide storage only without virtual machines.</p> Signup and view all the answers

    What is a requirement for deploying vSAN ESA related to the number of NICs?

    <p>One 10-Gbps NIC for VM traffic and one 25-Gbps NIC for vSAN traffic</p> Signup and view all the answers

    Which of the following statements about disk types in vSAN ESA is correct?

    <p>Requires Class D or better NVMe-based SSDs</p> Signup and view all the answers

    What does VMware Cloud Foundation licensing entitle customers to regarding vSAN?

    <p>Capacity entitlements for vSAN storage.</p> Signup and view all the answers

    What is a characteristic of compression in vSAN ESA?

    <p>Compression is configured individually for each object</p> Signup and view all the answers

    Which storage configuration is NOT supported by vSAN ESA?

    <p>Hybrid configurations</p> Signup and view all the answers

    What differentiates the compression efficiency of vSAN ESA from that of vSAN OSA?

    <p>ESA compression is much more efficient</p> Signup and view all the answers

    What is the default setting for compression in vSAN ESA storage policies?

    <p>Compression is enabled by default unless disabled for space efficiency.</p> Signup and view all the answers

    Which of the following characteristics does NOT apply to vSAN ESA storage policies?

    <p>Granular storage policies (per VMDK) are supported.</p> Signup and view all the answers

    What is meant by FTT in the context of vSAN ESA storage policies?

    <p>Failures to Tolerate.</p> Signup and view all the answers

    Which statement about vSAN ESA Auto Policy Management is inaccurate?

    <p>It only applies to manually created storage policies.</p> Signup and view all the answers

    How does vSAN ESA define storage policies?

    <p>By creating per-object storage policies.</p> Signup and view all the answers

    Which components does vSAN ESA concatenate with RAID-5?

    <p>RAID-0 components.</p> Signup and view all the answers

    What happens when a new VM is created on a vSAN ESA datastore?

    <p>The datastore default policy is automatically utilized.</p> Signup and view all the answers

    Which statement about the characteristics of the vSAN ESA default policy RAID 6 is correct?

    <p>It provides a Failures to Tolerate (FTT) of 2.</p> Signup and view all the answers

    What is the role of space efficiency concerning the compression feature in vSAN ESA?

    <p>Compression may be disabled if it negatively impacts space efficiency.</p> Signup and view all the answers

    In the context of vSAN ESA, which statement regarding the relevance of certain characteristics is true?

    <p>Flash-read cache reservation does not apply.</p> Signup and view all the answers

    What percentage of overhead is allocated for vSAN metadata?

    <p>5 percent</p> Signup and view all the answers

    What is the primary role of storage policies in a policy-driven storage system?

    <p>To define rules for service levels and protect data</p> Signup and view all the answers

    Which of the following statements best describes the structure of objects in vSAN?

    <p>Objects are constructed from components and require redundancy</p> Signup and view all the answers

    When sizing for a production environment, what is the recommended percentage for slack space?

    <p>30 percent</p> Signup and view all the answers

    What is the effective capacity calculation method for RAID 5 with FTT=1?

    <p>RAID Configuration</p> Signup and view all the answers

    What is a necessary requirement for implementing a Failures to Tolerate (FTT) policy in vSAN?

    <p>Additional ESXi hosts beyond the minimum configuration</p> Signup and view all the answers

    Which overhead does the vSAN design and sizing guide include if deduplication is utilized?

    <p>1 percent plus deduplication overhead</p> Signup and view all the answers

    What is a crucial requirement for stretched vSAN clusters regarding site locations?

    <p>Sites need to be physically separated.</p> Signup and view all the answers

    What is the potential consequence of entering Maintenance Mode in a vSAN setup?

    <p>Longer than expected maintenance operations</p> Signup and view all the answers

    Which RAID policy in vSAN provides mirrored copies of object data?

    <p>RAID-1 policy</p> Signup and view all the answers

    What should vSphere administrators now consider integrating into their roles?

    <p>Storage Administration</p> Signup and view all the answers

    What is the default Failures to Tolerate setting in a vSAN configuration?

    <p>1 failure to tolerate</p> Signup and view all the answers

    What is recommended to improve the overall performance of storage I/O controllers per host?

    <p>Use multiple storage I/O controllers</p> Signup and view all the answers

    What characteristic should the selected storage I/O controller possess for optimal performance?

    <p>Highest queue depth</p> Signup and view all the answers

    Which type of services does vSAN File Services include?

    <p>File shares and sys shares</p> Signup and view all the answers

    What distinct benefit does vSAN ESA provide over vSAN OSA regarding the impact of a single disk failure?

    <p>It allows for continuous operation of the disk group despite a cache failure.</p> Signup and view all the answers

    Which is a feature of the Log-Structured File System (LFS) introduced in vSAN ESA?

    <p>It transforms smaller writes into larger I/O blocks for efficiency.</p> Signup and view all the answers

    What is the primary reason for having a witness site in a stretched cluster?

    <p>To maintain witness components for object redundancy.</p> Signup and view all the answers

    What is one of the primary roles of storage pools in vSAN ESA?

    <p>To simplify the I/O process by allowing writes to a single disk.</p> Signup and view all the answers

    Which configuration is required for each availability zone in a stretched cluster?

    <p>An equal number of hosts across all availability zones.</p> Signup and view all the answers

    How does vSAN ESA manage data compression to enhance performance?

    <p>It compresses data once at ingest to minimize overhead.</p> Signup and view all the answers

    What is a significant use case for stretched clusters during planned maintenance?

    <p>To enable maintenance without service downtime.</p> Signup and view all the answers

    Which characteristic of vSAN ESA storage pools directly contributes to reduced I/O flow?

    <p>The support for NVMe based flash devices only.</p> Signup and view all the answers

    How does vSAN ESA handle encryption during the data ingestion process?

    <p>It encrypts data once at ingest, minimizing CPU usage.</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required in a default management domain for an availability zone?

    <p>Four hosts per zone.</p> Signup and view all the answers

    In a stretched cluster, what does spreading redundancy components across availability zones ensure?

    <p>Tolerance for the failure of an entire availability zone.</p> Signup and view all the answers

    What functionality does the vSAN Log-Structured File System (LFS) provide that enhances storage efficiency?

    <p>It allows high-performance snapshots for backups.</p> Signup and view all the answers

    What is the main advantage of having a single-tier architecture in vSAN ESA storage pools?

    <p>It simplifies the I/O writes without needing to cache data.</p> Signup and view all the answers

    What is a potential consequence of using traditional disk caching techniques as opposed to vSAN ESA's approach?

    <p>Increased likelihood of I/O bottlenecks if the cache fails.</p> Signup and view all the answers

    What is a primary benefit of introducing vSAN Max into a workload domain?

    <p>It helps extend the life of existing hardware assets.</p> Signup and view all the answers

    Which of the following is NOT a use case for vSAN Max?

    <p>High redundancy storage solutions.</p> Signup and view all the answers

    Which factor is essential in determining the memory requirements for full vSAN implementation per host?

    <p>32GB of memory for each host.</p> Signup and view all the answers

    What is the recommended boot device for vSAN?

    <p>128-GB High-Endurance Device such as SSD.</p> Signup and view all the answers

    Which storage device configuration is likely to provide better performance?

    <p>All-flash storage.</p> Signup and view all the answers

    To normalize storage management, what does vSAN Max align its management experience with?

    <p>vSAN HCI management.</p> Signup and view all the answers

    What is a key factor to consider for CPU allocation in vSAN?

    <p>vCPU-to-core ratio and overhead.</p> Signup and view all the answers

    Which element is essential for ensuring redundancy in disk controllers used in vSAN?

    <p>Utilizing multiple storage controllers.</p> Signup and view all the answers

    What is the minimum memory requirement per host for deduplication and compression in a vSAN environment?

    <p>32GB per host.</p> Signup and view all the answers

    What type of environments does vSAN Max typically support for optimal scaling?

    <p>Cloud native applications.</p> Signup and view all the answers

    Which of the following statements best describes the role of storage policies in vSAN?

    <p>They categorize storage by desired performance levels and availability.</p> Signup and view all the answers

    What is the default policy for Failures to Tolerate (FTT) in vSAN?

    <p>One failure to tolerate.</p> Signup and view all the answers

    Which of the following best describes the composition of an object in vSAN?

    <p>An object is composed of various components, including a flat.VMDK file.</p> Signup and view all the answers

    What is one of the primary advantages of policy-driven object-based storage in vSAN?

    <p>It allows different types of objects to be treated according to specific policies.</p> Signup and view all the answers

    Which failure tolerance method relies on redundancy across ESXi hosts in vSAN?

    <p>Mirroring with RAID-1</p> Signup and view all the answers

    What is the minimum number of ESXi hosts needed for a FTT of 1 using Raid-1?

    <p>3 hosts</p> Signup and view all the answers

    Which of the following RAID configurations has the highest failure tolerance?

    <p>Raid-6</p> Signup and view all the answers

    What is the result of applying deduplication before compression in vSAN?

    <p>Reduction in data during destaging</p> Signup and view all the answers

    For a storage configuration using Raid-5 and FTT of 1, what is the minimum required storage capacity across ESXi hosts?

    <p>133 GB</p> Signup and view all the answers

    What is the primary nature of deduplication and compression in vSAN ESA?

    <p>They are policy-based.</p> Signup and view all the answers

    Which of the following statements regarding deduplication in vSAN is true?

    <p>Deduplication applies a 4K fixed block size algorithm.</p> Signup and view all the answers

    What effect does removing a host from a vSAN ESA cluster have on the storage policy?

    <p>It could render the policy noncompliant.</p> Signup and view all the answers

    What happens during data ingestion in vSAN when both deduplication and compression are enabled?

    <p>Both techniques are applied sequentially.</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required for FTT of 2 when using Raid-5?

    <p>6 hosts</p> Signup and view all the answers

    Which storage configuration option is not supported when using a disaggregated vSAN Max deployment?

    <p>Stretched cluster topology</p> Signup and view all the answers

    Which RAID configuration is associated with a minimum requirement of 3 hosts and can tolerate 1 failure?

    <p>Raid-1</p> Signup and view all the answers

    What is required to change the storage type in a VMware Cloud Foundation cluster?

    <p>It must be performed at cluster creation time.</p> Signup and view all the answers

    In the context of vSAN, what does enabling deduplication and compression require?

    <p>An all-flash architecture</p> Signup and view all the answers

    For vSAN Max, what is the range of storage capacity available per host?

    <p>20 to 360 TB</p> Signup and view all the answers

    What does the vSAN Health UI do in response to policy noncompliance?

    <p>It generates health alerts.</p> Signup and view all the answers

    Which is true regarding the limitation of presentation for vSAN Max storage?

    <p>Presentation is limited to the same vCenter system.</p> Signup and view all the answers

    What defines the flexibility in deploying clusters using VMware Cloud Foundation 5.2?

    <p>Flexibility between aggregated and disaggregated storage options.</p> Signup and view all the answers

    What happens if a host is decommissioned using SDDC Manager in a vSAN ESA cluster?

    <p>The process is the same as for non-ESA hosts.</p> Signup and view all the answers

    What is a characteristic that distinguishes vSAN Max from traditional storage?

    <p>vSAN Max supports storage-only clusters.</p> Signup and view all the answers

    What is the primary consideration in sizing vSAN for a production environment?

    <p>Slack space</p> Signup and view all the answers

    Which RAID configuration is specifically stated for effective capacity calculations in vSAN?

    <p>RAID 5</p> Signup and view all the answers

    What percentage of available capacity is typically left after accounting for all overhead in vSAN?

    <p>50%</p> Signup and view all the answers

    What is a requirement for the storage I/O controller when designing for vSAN?

    <p>Use multiple controllers per host</p> Signup and view all the answers

    What is the impact of entering Maintenance Mode in vSAN?

    <p>It counts as a failure</p> Signup and view all the answers

    Which characteristic is essential for stretched vSAN clusters to ensure high availability?

    <p>Low latency connections</p> Signup and view all the answers

    In the context of vSAN sizing, how is the metadata overhead typically expressed?

    <p>5 percent</p> Signup and view all the answers

    What happens during the use of RAID-1 in vSAN?

    <p>It requires multiple hosts</p> Signup and view all the answers

    What is the recommended approach regarding storage controllers in vSAN implementation?

    <p>Disable advanced features on controllers</p> Signup and view all the answers

    Which of these statements accurately reflects a consideration when sizing vSAN?

    <p>Deduplication overhead can affect total storage capacity.</p> Signup and view all the answers

    What is the minimum number of ESXi hosts required in an availability zone in a stretched cluster management domain?

    <p>Four</p> Signup and view all the answers

    In the context of a stretched cluster, which function does the witness site serve?

    <p>Maintains witness components for fault tolerance</p> Signup and view all the answers

    Which statement accurately describes an aspect of fault domains in a stretched cluster?

    <p>They spread redundancy components across availability zones.</p> Signup and view all the answers

    Which scenario is appropriate for using a stretched cluster?

    <p>To allow service maintenance without downtime</p> Signup and view all the answers

    What is the impact of stretching the management cluster before any VI workload clusters?

    <p>It sets up the necessary infrastructure for workloads.</p> Signup and view all the answers

    What is the primary disk configuration structure used by vSAN ESA?

    <p>Single-tier structure called a storage pool</p> Signup and view all the answers

    Which configuration supports the maximum number of disks in vSAN OSA?

    <p>40 disks per vSAN host</p> Signup and view all the answers

    Which statement best describes the encryption differences between vSAN OSA and vSAN ESA?

    <p>Both use a single KEK per cluster but different DEK management</p> Signup and view all the answers

    What is a key limitation for disk support in vSAN ESA?

    <p>No support for SAS and SATA devices</p> Signup and view all the answers

    What are the minimum CPU and RAM requirements for deploying vSAN ESA?

    <p>32 CPUs and 512 GB of RAM</p> Signup and view all the answers

    How does compression configuration differ between vSAN OSA and vSAN ESA?

    <p>Compression is a cluster-wide setting in vSAN OSA</p> Signup and view all the answers

    Which feature is exclusively not available in vSAN ESA?

    <p>Deduplication capabilities</p> Signup and view all the answers

    What is the recommended overhead percentage for vSAN metadata calculations?

    <p>5 percent</p> Signup and view all the answers

    Which storage policy is recommended for a production environment with high availability needs?

    <p>FTT=2</p> Signup and view all the answers

    What is the ideal method for connecting availability zones in stretched vSAN clusters?

    <p>10Gbps, low-latency networks</p> Signup and view all the answers

    What is included in the vSAN design and sizing guide for formatting overhead without deduplication?

    <p>1 percent</p> Signup and view all the answers

    Which of the following factors must be verified when using vSAN ReadyNode recommendations?

    <p>Firmware and drivers</p> Signup and view all the answers

    What is the maximum size for the thin provisioned VM home namespace in vSAN?

    <p>255 GB</p> Signup and view all the answers

    What percentage of CPU overhead should be considered for vSAN when sizing?

    <p>10 percent</p> Signup and view all the answers

    Which characteristic of storage I/O controllers is preferred to enhance performance in vSAN?

    <p>High queue depth</p> Signup and view all the answers

    How does vSAN ensure availability during maintenance mode?

    <p>Counts as a failure</p> Signup and view all the answers

    What should be considered regarding resync traffic in a vSAN environment?

    <p>Resync duration can impact performance</p> Signup and view all the answers

    What flexibility does VMware Cloud Foundation 5.2 provide regarding storage clustering?

    <p>Customers can choose between aggregated vSAN HCI and disaggregated vSAN Max clusters.</p> Signup and view all the answers

    What limitation is associated with disaggregated vSAN Max deployments?

    <p>They cannot support stretched cluster topologies.</p> Signup and view all the answers

    At what point must the selection of vSAN HCI or vSAN Max be made?

    <p>During the initial cluster creation only.</p> Signup and view all the answers

    What is the major feature of vSAN Max support under VMware Cloud Foundation?

    <p>It is designed solely for managing ESXi hosts without virtual machines.</p> Signup and view all the answers

    What storage capacity range is offered per vSAN Max host?

    <p>20 to 360 TB</p> Signup and view all the answers

    Which statement is true regarding vSAN ESA clusters?

    <p>Deduplication and compression are policy-based in vSAN ESA.</p> Signup and view all the answers

    What is a consequence of host removal regarding vSAN ESA's default storage policy?

    <p>The policy compliance may be violated due to host number changes.</p> Signup and view all the answers

    How is storage presented in vSAN Max and VMware Cloud Foundation?

    <p>It is confined to the same vCenter system.</p> Signup and view all the answers

    What is a requirement for the minimum number of ESXi hosts in a VI workload domain?

    <p>Three hosts</p> Signup and view all the answers

    What is the role of the witness site in a stretched cluster configuration?

    <p>It maintains witness components for necessary objects.</p> Signup and view all the answers

    Which statement best describes the configuration of availability zones in a stretched cluster?

    <p>Each availability zone must contain the same number of hosts.</p> Signup and view all the answers

    What is the primary purpose of using a stretched cluster during planned maintenance?

    <p>To prevent any service downtime during maintenance.</p> Signup and view all the answers

    How do fault domains work in a stretched cluster?

    <p>They allow the failure of an entire fault domain.</p> Signup and view all the answers

    What is a primary use case for implementing vSAN Max?

    <p>Keeping storage independent from compute for optimal resource management</p> Signup and view all the answers

    Which characteristic applies to vSAN Max's management system?

    <p>It uses a consistent management experience across environments.</p> Signup and view all the answers

    What is a recommended hardware configuration for vSAN's performance?

    <p>Implementing NVMe cache with SAS disks for better responsiveness</p> Signup and view all the answers

    What allows for storage optimization in application licensing according to vSAN Max?

    <p>Keeping compute clusters small to reduce associated licensing costs</p> Signup and view all the answers

    Why is it beneficial to extend the life of existing hardware assets with vSAN Max?

    <p>It reduces the need for additional purchase of new components.</p> Signup and view all the answers

    What is a recommended minimum memory requirement for a fully operational vSAN?

    <p>32GB per host</p> Signup and view all the answers

    Which RAID configuration is indicated to offer the highest fault tolerance?

    <p>RAID 6</p> Signup and view all the answers

    What does vSAN Max contribute to private AI environments?

    <p>An efficient method for storing large datasets related to big data</p> Signup and view all the answers

    Which of the following is essential for achieving higher performance in vSAN configurations?

    <p>Multiple storage controller setups for redundancy</p> Signup and view all the answers

    What does vSAN Max help normalize within storage management?

    <p>Management processes across different environments</p> Signup and view all the answers

    Study Notes

    Policy Driven Storage System

    • Storage-based policy management (SPBM) with VCF assets ensures:
      • Specified capacity levels
      • Performance
      • Availability
      • Redundancy
    • Storage policies categorize storage for service levels and configure VM disks for optimal configurations. Data protection is ensured through object-based fault tolerance.
    • SPBMs are a set of predefined rules.

    Traditional VM Storage

    • VM disks are pointed to flat.vmdk files on the storage array. A storage admin must be involved in configuring LUNs.
    • Understanding the physical disk makeup (how many, mirrored, etc.) and capacity may require additional interaction with the storage administration team.

    Policy Driven Object-Based Storage

    • VSAN policies protect NSX, SDDC Manager, workload VMs, and VSAN data by strategically placing data objects across the datastore.
    • Storage policies apply to VM home namespaces, VMDK objects, thin-provisioned VM swap objects, snapshot delta objects, VM memory objects, VSAN Datastore data objects, VSAN performance data objects, and VSAN File System Service.

    vSAN Storage

    • Objects (like flat.vmdk) have components that make up the object.
    • Redundancy is necessary for components. For a flat.VMDK, it needs to be on multiple ESXi hosts. Mirroring copies can be part of the policy.

    Failures to Tolerate (FTT)

    • Default policy is 1 failure to tolerate.
    • Modifying a vSAN Default Storage Policy involves creating a new copy and modifying as needed.
    • Policy changes affecting many objects could take time to process and should be implemented in stages.
    • Host count requirements can vary based on the FTT value.

    RAID Comparisons

    • RAID 1 mirroring offers no space saving, compared to Raid5 or Raid6 which offer space savings.
    • Additional ESXi hosts are needed for increased FTT values for RAID 5 and RAID 6.
    • FTT of 1 requires 3 hosts for RAID 1, and 4 hosts for RAID 5 or RAID 6.
    • FTT of 2 requires 5 hosts for RAID 1, and 6 hosts for RAID 5 or RAID 6.

    vSAN Storage Policy Consumption Comparison

    • RAID 0 / FTT 0: 1 component, 1 host; 100 GB storage.
    • RAID 1 / FTT 1: 3 components, 3 hosts, 200 GB storage.
    • RAID 1 / FTT 2: 5 components, 5 hosts, 300 GB storage.
    • RAID 1 / FTT 3: 7 Components, 7 hosts, 400 GB storage.
    • RAID 5 / FTT 1: 4 components, 4 hosts; 133GB of storage.
    • RAID 6 / FTT 2: 6 components, 6 hosts; 150GB of storage

    Deduplication and Compression

    • Reduces data storage by ensuring only a single instance of redundant data is stored.
    • Requires all-flash architecture.
    • Deduplication removes redundant data blocks, Compression reduces the size of each data block.
    • This is performed in the cache tier to the capacity tier. A 4KB block size is used.

    vSAN ESA (Express Storage Architecture)

    • Uses current and future hardware to increase data security, performance, and space efficiency.
    • vSAN ESA utilizes NVMe technology for high-performance and scalability. This uses the current and future hardware better.
    • Supports only all-flash configurations, no two-tier disk construct (now single tier, storage pools).
    • This also does not have granular storage policies (per VMDK), but instead, per-object storage policies.
    • Compression is on by default; Granular storage policies are not supported, and the number of disk stripes per object is not relevant.

    vSAN ESA Configuration

    • vSAN ESA requires 32 CPUs and 512 GB RAM minimum
    • Requires 25 Gbps NIC for vSAN traffic, 10 Gbps for VM/management traffic and NVMe SSDs, Class D or F for performance
    • No support for SAS and SATA devices
    • Requires at least 1.6 TB disk size

    vSAN ESA Cluster

    • Deploying vSAN ESA cluster: use the API.
    • Creating a new vSAN ESA cluster: in either a new VI workload domain or an existing one, and use vSAN ESA as the storage type for hosts.
    • No in-place upgrades.
    • Supports NVMe TLC, and other high-performing configurations only.

    VM Storage Policies

    • Policies are used how objects are stored in VMs.
    • Policies can be applied and can be changed.
    • Policies are applied to objects like VMDKs.

    vSAN Log-Structured File System (LFS)

    • The vSAN LFS reduces I/O amplification.
    • It's compatible with future device types.
    • It provides high-performance snapshots.
    • The LFS ingests small I/O, packages them into I/O blocks, and performs encryption, compression, and checksum.
    • Writing happens to the performance leg, and then to the capacity leg.

    vSAN Capacity Reporting

    • Compression, is enabled by default unless you otherwise disable it.
    • Granular policies are not supported for vSAN ESA.
    • Auto-Policy Management configures optimized policies based on cluster size.

    vSAN for stretched clusters

    • Availability zones.
    • Witness host.
    • Must configure NSX Edge gateways for failover to AZ2.
    • Configure IP prefix lists for outbound advertisements.
    • Configuring inbound and outbound route maps.
    • Added BGP neighbors for AZ2 and configuring route maps as route filters.
    • Networking round-trip time (RTT) must be less than or equal to 5 milliseconds in both availability zones.
    • For planned or unplanned downtime.

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    Related Documents

    vSAN Storage Notes (PDF)

    Description

    Test your knowledge on VMware vSAN ESA design and sizing concepts through this insightful quiz. Explore topics such as metadata overhead, storage policies, and system benefits specific to vSAN ESA. Perfect for those looking to deepen their understanding of efficient storage solutions in VMware environments.

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