Introduction – Please Read First

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Files

1.  Is this replacing a current solution, or is this a net new project?
     a.  What’s the current solution?

Why ask? This question helps us understand the use case, any current expectations and what the competitive landscape may look like as well as an initial idea of the size / scale of the current solution.

2.  Is there a requirement to use an existing Nutanix cluster (with existing workload) or net new Nutanix cluster?

Why ask? If we’re sizing into an existing cluster we need to understand current hardware and current workload.  For licensing purposes adding Files to an existing cluster means the Unified Storage Pro license. A common scenario has been to add storage only nodes to an existing cluster to support the new Files capacity.  If sizing into a new cluster we can potentially dedicate this cluster to Files and Unified Storage. 

3.  Is this for NFS, SMB or both? Which protocol versions (SMB 3.0, NFSv4, etc)?

Why ask?  We need to understand protocol to first validate they are using supported clients.  Supported clients are documented in the release notes of each version of Files.  Concurrent SMB connections also impact sizing with respect to the compute resources we need for the FSVMs to handle those clients.  Max concurrent connections are also documented in the release notes of each version. 

It also helps us validate supported authentication methods.  For SMB, we require Active Directory where we support 2008 domain functional level or higher.  There is limited local user support for Files but the file server must still be registered with a domain.  For NFS v4 we support AD with Kerberos, LDAP and Unmanaged (no auth) shares.  For NFS v3 we support LDAP and Unmanaged. 

4.  Is there any explicit performance requirement for the customer? Do they require specific IOPS or performance targets? 

Why ask?  Every FSVM has an expected performance envelope.  There is a sizing guide and performance tech note on the Nutanix Portal which give a relative expectation on the max read and write throughput per FSVM and max read or write IOPs per FSVM. 

Throughput based on reads and writes are integrated into Nutanix Sizer and will impact the recommended number of FSVMs.  This may also impact the hardware configuration,including choice of NICs, leveraging RDMA between the CVMs, or iSER supported since the Files 5.0 release via a performance profile. Also the choice of all flash vs. hybrid.  

5.  Do they have any current performance collection from their existing environment?
      a.  Windows File Server = Perfmon
      b.  Netapp = perfstat
      c.  Dell DPACK, Live Optics

Why ask?  Seeing data from an existing solution can help validate the performance numbers so that we size accurately for performance. 

6.  What are the specific applications using the shares?
       a.  VDI (Home Shares)
       b.  PACS (Imaging)
       c.  Video (Streaming)
       d.  Backup (Streaming)

Why ask?  When sizing for storage space utilization the application performing the writes could impact storage efficiency.  Backup, Video and Image data are most commonly compressed by the application.  For those applications we should not include compression savings when sizing, only Erasure Coding.  For general purpose shares with various document types assume some level of compression savings.  

7.  Are they happy with performance or looking to improve performance?

Why ask?  If the customer has existing performance data, it’s good to understand if they are expecting equivalent or better performance from Files.  This could impact sizing, including going from a hybrid to an all flash cluster. 

 8.  How many expected concurrent user connections?

Why ask? Concurrent SMB connections are a required sizing parameter.  Each FSVM needs enough memory assigned to support a given number of users.  A Standard share is owned by one FSVM.  A distributed share is owned by all FSVMs and is load balanced based on top level directories.  We need to ensure any one FSVM can support all concurrent clients to the standard share or top level directory with the highest expected connections. We should also be ensuring that the sizing for concurrent connections is taking into account N-1 redundancy for node maintenance/failure/etc.

 9.  What is your current share configuration including number of shares?

Why ask?  Files has a soft (recommended) limit of 100 shares per FSVM. We also leverage Nested shares to match an existing environment if there are more shares needed.  Files currently supports 5,000 nested shares since the 4.4 release.

10.  Does their directory structure have a large number of folders in share root?

Why ask?  This indicates a large number of top level directories making a distributed share a good choice for load balancing and data distribution.

11. Are there Files in the share root?

Why ask?  Distributed shares cannot store files in the share root.  If an application must store files in the root then you should plan for sizing using standard shares.  Alternatively, a nested share can be used. 

 12. What is the largest number of files/folders in a single folder?

Why ask?  Nutanix Files is designed to store millions of files within a single share and billions of files across a multi-node cluster with multiple shares.  To achieve speedy response time for high file and directory count environments it’s necessary to give some thought to directory design. Placing millions of files or directories into a single directory is going to be very slow in file enumeration that must occur before file access.  The optimal approach is to branch out from the root share with leaf directories up to a width (directory or file count in a single directory) no greater than 100,000.  Subdirectories should have similar directory width.  If file or directory counts get very wide within a single directory, this can cause slow data response time to client and application.  Increasing FSVM memory up to 96 GB to cache metadata can help improve performance for these environments especially if designs for directory and files listed above are followed.

13. What is the total size of largest single directories?

Why ask?  Nutanix supports standard shares up to 1PiB starting with the Files 5.0 release (prior to compression.)  And top level directories in a distributed share up to 1PiB.  These limits are based on the volume group supporting the standard share or top level directory.  We need to ensure no single folder or share (if using a standard share) surpasses 1PiB.

12. Largest number of files/folders in a single folder?

Why ask?  Nutanix Files is designed to store millions of files within a single share and billions of files across a multi-node cluster with multiple shares.  To achieve speedy response time for high file and directory count environments it’s necessary to give some thought to directory design. Placing millions of files or directories into a single directory is going to be very slow in file enumeration that must occur before file access.  The optimal approach is to branch out from the root share with leaf directories up to a width (directory or file count in a single directory) no greater than 100,000.  Subdirectories should have similar directory width.  If file or directory counts get very wide within a single directory, this can cause slow data response time to client and application.  Increasing FSVM memory to cache metadata and increasing the number of vCPUs can help improve performance for these environments especially if designs for directory and files listed above are followed.

13  Does the total storage and compute requirements including future growth?

Why ask?  Core sizing question to ensure adequate storage space is available with the initial purchase and over the expected timeframe. 

14.  What percent of data is considered to be active/hot?

 Why ask?  Understanding the expected active dataset can help with sizing the SSD tier for a hybrid solution.  Performance and statistical collection from an existing environment may help with this determination.

 15.  What is your storage change rate?

Why ask?  Change rate influences snapshot overheads based on retention schedules.  Nutanix Sizer will ask what the change rate is for the dataset to help with determining the storage space impact of snapshot retention.

 16.  Do you have any storage efficiency details from the current environment (dedup, compression, etc.)?

Why ask?  Helps to determine if data reduction techniques like dedup and compression are effective against the customers data.  Files does not support the use of deduplication today, so any dedup savings should not be taken into account when sizing for Files.  If the data is compressible in the existing environment it should also be compressible with Nutanix compression.

 17.  What is the block size of current solution (if known)?

Why ask?  Block size can impact storage efficiency.  A solution which has many small files with a fixed block size may show different space consumption when migrated to Files, which uses variable block lengths based on file size.  For files over 64KB in size, Files uses a 64KB block size.  In some cases a large number of large files have been slightly less efficient when moved to Nutanix Files.  Understanding this up front can help explain differences following migrations.

18.  Is there a requirement for Self Service Restore (SSR)?

Why ask?  Nutanix Files uses two levels of snapshots, SSR snapshots occur at the file share level via ZFS.  These snapshots have their own schedule and Sizer asks for their frequency and change rate under “Nutanix Files Snapshots.”  The schedule associated with SSR and retention periods will impact overall storage consumption. Nutanix Files Snapshots increase both the amount of licensing required and total storage required, so it’s important to get it right during the sizing process.

 19.  What are the customer’s Data Protection/Disaster Recovery requirements and what is their expected snapshot frequency and retention schedule (hourly, daily, weekly, etc.)?

Why ask? Data Protection snapshots occur at the AOS (protection domain) level via the NDSF.  The schedule and retention policy are managed against the protection domain for the file server instance and will impact overall storage consumption.  Sizer asks for the local and remote snapshot retention under “Data Protection.”
Files supports 1hr RPO today and will support near-sync in the AOS 5.11.1 release in conjunction with Files 3.6.  Keep in mind node density (raw storage) when determining RPO.  Both 1hr and near-sync RPO require hybrid nodes with 40TB or less raw or all flash nodes with 48TB or less raw.  Denser configurations can only support 6hr RPO.  These requirements will likely change so double check the latest guidance when sizing dense storage nodes. Confirm that underlying nodes and configs support NearSync per latest AOS requirements if NearSync will be used.

 20. Does the customer have an Active/Active requirement?

Why ask?  If the customer needs active/active file shares in different sites which represent the same data, we need to position a third party called Peer Software.  Peer performs near real time replication of data between heterogenous file servers.  Peer utilizes Windows VMs which consume some CPU and memory you may want to size into the Nutanix clusters intended for Files.

Files 5.0 introduced an active/active solution called VDI sync, specific for user profile data.  The solution supports activity against user specific profile data within one site at a time.  If the user moves to another site, the VDI session can follow and localize access for that user.

 21. Is there an auditing requirement? If so, which vendor or vendors

Why ask?  Nutanix is working to integrate with three main third-party auditing vendors today, Netwrix (supported and integrated with Files), Varonis (working on integration) and Stealthbits (not yet integrated).  Nutanix Files also has a native auditing solution in File Analytics.

Along with ensuring audit vendor support, a given solution may require a certain amount of CPU, Memory and Storage (to hold auditing events).  Ensure to include any vendor specific sizing in the configuration.  File Analytics for example could require 8vcpu 48GB of memory and 3TB of storage.

Data Lens is a SaaS offering in the public cloud, so you will need to ensure the customer is comfortable with a cloud solution. 

22. Is there an Antivirus requirement? If so, which vendors?

Why ask? Files supports specific Antivirus vendors today with respect to ICAP integration.  For a list of supported vendors see the software compatibility matrix on the Nutanix Portal and sort by Nutanix Files:

https://portal.nutanix.com/page/documents/compatibility-interoperability-matrix/software

If centralized virus scan servers are to be used you will want to include their compute requirements into sizing the overall solution.

 23. Is there a backup requirement? If so, which vendor or vendors?

Why ask?  Files has full change file tracking (CFT) support with HYCU, Commvault, Veeam, Veritas and Storware.  There are also vendors like Rubrik who are validated but do not use CFT.  If including a backup vendor on the same platform, you may need to size for any virtual appliance which may also run on Nutanix. 

23. Is the customer using DFS (Distributed File Server) Namespace (DFS-N)?

Why ask?  Less about sizing and more about implementation.  Prior to Files 3.5.1 Files could only support distributed shares with DFS-N.  Starting with 3.5.1 both distributed and standard shares are fully supported as folder targets with DFS-N.

Files 5.1 introduced a native unified namespace to combine different file servers into a common namespace.  

 24.  Does the customer have tiering requirements?

Why ask?  Files supports tiering which means automatically moving data off Nutanix Files and to an S3 compliant object service either on-premises or in the cloud.  In scoping future requirements, customers may size for a given amount of on-premises storage and a larger amount of tiered storage for longer term retention.

Introduction – Please Read First

The questions here are to assist with ensuring that you’re gathering the necessary information from a customer/prospect to provide an appropriate solution to meet their requirements.  This is in addition to capturing specific metrics from tools such as Nutanix Collector or RVTools.   

The list is not exhaustive and will need to be adapted to the appropriate audience.  It should be used as a guide to make sure you’ve conducted a thorough discovery.  It is important that you don’t just ask a question without understanding the reason why and why it matters – this leads to providing an optimal solution. 

Always ask open questions (“Tell me more…”) and where possible avoid talking about Nutanix products and capabilities so as not to derail the gathering information.  If asked, suggest this will form part of a follow-up workshop. 

Questions marked with an asterisk (*) may require the assistance of a Portfolio Specialist or Solution Architect to go deeper with the customer on that topic/question.  Make sure you use the answers to these questions in the Scenario Objectives in Sizer when you create a new scenario.  The questions will help guide you to completing the customer’s requirements, constraints, assumptions, and risks for your opportunity.   

This is a live document, and questions will be expanded and updated periodically.
 

Revision History 

Revision 2025.1 Darren Woollard March 19, 2025

Initial Publication Lane Leverett November 2020
 

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Server Virtualization

Generic & State of The Union Questions

Generic & State of The Union Questions 

1. What does your server virtualization environment look like today? 

       a. Hardware – single or multiple vendors?  By choice, risk mitigation or from mergers? 

       b. Software – the hypervisor and the eco-system that surrounds it (not just the hypervisor components, think of self-service, build automation, micro-segmentation, ticketing workflow, backup, etc…) 

2. What do you find most challenging about your current virtualization environment (examples below)? 

      a. Management? 

      b. Business/people process is manual (causing slow turnaround, bad perception of I.T.) 

       c.  Upgrading/patching across multiple sites 

       4.  Needing 3rd party software to complete certain tasks 

3. In your virtualized environment, what keeps you up at night? 

4. What is working well in your current virtualization environment that you want to ensure is continued? 

5. What does your cloud strategy currently look like?
      a. Private Cloud, Hybrid Cloud, Public Cloud, Multi-Cloud, “We’re Cloud First”
            i.   Why has this strategy been chosen?
            ii.  Who is directing/championing this strategy? 

6. What is the desired position when it comes to utilizing Public Cloud provider services?  In the next, say 1-3 years
      a. Is a distributed multi-cloud operating model perceived to be the best way to deliver the services of the business?        

       b. Is there a preference of a specific Public Cloud provider? 

      c. Will some services remain on-premises and some within the Public Cloud? 

       d. Will some services transform to SaaS offerings during a digital transformation project removing the need for the on-prem application? 

       e. What are the top 3 concerns about operating in a distributed ‘Cloud’ model? 

 Architecture/Solution Specific Questions

1. Do you have a preferred  x86 server vendor standard?
     a. Are you happy with this vendor?
     b.  If so, what do you enjoy/appreciate the most?
     c. If not, what do you find the most challenging? 

2. What is your preferred storage vendor for virtualization?
     a. Are you leveraging RDM (Raw Device Mappings) for your workloads?
     b. If so, can you please provide some workload examples?
           i.  Oracle, MS CSV’s, SCSI-3 Shared Devices 

3. What is your preferred storage vendor for physical workloads? 

       a. How do the physical servers connect to the storage presentation? 

       b.  What is the storage presentation protocol to these devices (iSCSI, NFS, etc…) 

4. How do you currently connect your storage to your x86 servers?
     a.  NFS, FC, FCOE, iSCSI 

 5.  What SAN/Storage hardware is in place today? 

       a. HDD/Hybrid/All Flash/etc…? 

       b. How many spindles of each? 

       c. How many Controllers/Storage Processors? 

       6. What does the logical disk layout look like? 

              a. RAID Level? 

              b. Number of disks per RAID Group? 

7. Who is your preferred hypervisor vendor and what version(s) are deployed? 

       a. If multiple vendors are used, is this due to architectural reasons? 

8. How open would you be to considering other hypervisors? 

9. Who is your preferred networking vendor? 

10. Are you using traditional 3-Tier networking or Leaf-Spine networking? 

11. What does your networking architecture/rack design look like? 

12. Are you integrating hypervisor networking and what are your current networking standards?
        a.  Cisco ACI / VMware NSX / Arista / Cumulus 

13. A collection of data from your current environment is preferred in order that a point in time capture can be reviewed.  Can we use Nutanix Collector, RVTools (VMware estates), Dell LiveOptics, Microsoft MAP, Oracle AWR, or any other inventory collection you may have used to gather at a minimum, the following information?:
      a.  # of Virtual Machines
      b.  # of vCPUs
      c.  Current vCPU to Physical Core oversubscription
      d.  Current Physical CPU Model In hosts (for SpecInt Sizing/Comparison- http://ewams.net/?view=How_to_Size_the_CPUs_of_New_Systems_Using_my_Specint_Rated_Tool )
      e.  Allocated memory
      f.  Provisioned storage
      g.  Consumed storage
      h.  Largest vCPU allocation (for NUMA design)
      i.  Largest Memory allocation (for NUMA design)
      j.  Working set size (what will sit in SSD for Hybrid)-can be determined from daily incremental backups (https://www.joshodgers.com/2014/09/25/rule-of-thumb-sizing-for-storage-performance-in-the-new-world/ ) 

Backup & Data Protection Questions

See BCDR Discovery Guidance Doc

Introduction – Please Read First

These questions are here to assist with ensuring that you’re gathering necessary information from a customer/prospect in order to put together an appropriate solution to meet their requirements in addition to capturing specific metrics from tools like Collector or RVTools. 

This list is not exhaustive, but should be used as a guide to make sure you’ve done proper and thorough discovery.  Also, it is imperative that you don’t just ask a question without understanding the reason why it is being asked.  We’ve structured these questions with not only the question that should be asked, but why we are asking the customer to provide an answer to that question and why it matters to provide an optimal solution. 

Questions marked with an asterisk (*) will likely require reaching out to a specialist/Solution Architect resource at Nutanix to go deeper with the customer on that topic/question.  Make sure you use the answers to these questions in the Scenario Objectives in Sizer when you create a new Scenario.  These questions should help guide you as to what the customer requirements, constraints, assumptions, and risks are for your opportunity. 

This is a live document, and questions will be expand and update over time.

Revision History 

April 2025 – First life cycle – Thomas Brown, Shane Lyndsey, John Hanna
November 2020 – First Publication – Lane Leverett 

 

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Automation & Self Service

Discovery Questions

1.  How are you currently automating IT Service Delivery today, do you have any:
     a.  IAAS – Infrastructure as a service
     b.  PaaS – Platform as a service
     c.  SaaS – Software as a service

Why ask?  This question helps us understand the customer’s maturity level when it comes to application deployment and could uncover some of the competitive infrastructure.  It can also uncover some of the products that we may need to integrate with.   

2.  Are standardizing and compliance important to you in your IT Automation Delivery Strategy? If so, do you currently use a business intake or self-service request process via a solution such as ServiceNow, Cherwell, Remedy, etc. to automate IT service delivery?

Why ask? This question will give you the opportunity to discuss our SERVICE NOW plugin. Also helps understand which front end they will use for the Self Service implementation. If they do not use ServiceNow, be aware that it is possible to integrate with other ITSM solutions using the Self Service API.

3. Do you have any contracts with the cloud providers (AWS, Azure or GCP)?
a.  What are the specific use cases or workload profiles consumed from the cloud providers?

Why ask? This question helps you understand which providers they use which may consume Self Service. Helps us understand which services are still on-prem and available as a target for NCI. May help position Cost Governance. Also helps us understand if they have a Microsoft EA which may force the spend to go to Azure.

4.  Can you describe the process, do you have any documentation  for VM, OS or Database Deployment and Management?

Why ask? This question helps to uncover their current pain points and possibly the competitive landscape. This would typically be asked when talking to the Infrastructure Team.  If the process is already well documented/defined, the hardest part of the implementation is already done.

5.  What tools do you leverage to automate your Windows or Linux Server builds beyond the imaging / template / cloning process?
      a.  vRA
      b.  Terraform
      c.  Puppet
      d.  Chef
      e.  Ansible
      f.  Salt
      g.  SCCM

Why ask? This question helps you to understand the competitive landscape as well as integration points that will need to be solved 

6.  How many VMs are under management today?

Why ask? This question will help you to estimate the size of the deal for licensing

7.  What does your infrastructure footprint for managing/running containers look like?
      a.  What tools are you using?
      b.  How many containers?
      c.  If Kubernetes, how many pods and containers?
      d.  Which distribution of Kubernetes? (NKP/ AKS/EKS/Anthos/Openshift/Tanzu/etc)

Why ask? This question will help you to understand their current location on the journey to cloud native apps.  If they are still investigating, we have an option to position NKP. If they are using another product already, we may be able to provide the infrastructure for that environment. 

8. In your application development organization, is Continuous Integration/Continuous Delivery (CI/CD) an operating principle?
      a.  What tools do you leverage in your current/targeted pipeline?
            i.    Jenkins
            ii.   Atlassian Bamboo
            iii.  CircleCI
            iv.  GitLab CI/CD
            v.   Azure DevOps

Why ask? This question will help you to understand the integrations needed for a successful implementation.

Resources:

Glossary of Terms: https://github.com/nutanixworkshops/Self Servicebootcamp/blob/master/appendix/glossary.rst  

LinkedIn Learning – DevOps Foundations Learning Plan: https://www.nutanixuniversity.com//lms/index.php?r=coursepath/deeplink&id_path=79&hash=2ce3cb1f946cc3770bd466853e68ee36ddbcf5e1&generated_by=19794 

Udacity+Nutanix: Hybrid Cloud Engineer Nanodegree 

Self Service IaaS Hands On Lab (Partners – Reach out to your channel SE to participate in a hands on lab) 

Test Drive – Build a Self Service Platform  

Test Drive – Fast Track Your Cloud Native Journey 

Introduction – Please Read First

These questions are here to assist with ensuring that you’re gathering necessary information from a customer/prospect in order to put together an appropriate solution to meet their requirements in addition to capturing specific metrics from tools like Collector or RVTools.  

This list is not exhaustive but should be used as a guide to make sure you’ve made a proper and thorough discovery.  Also, it is imperative that you don’t just ask a question without understanding the reason why it is being asked.  We’ve structured these questions with not only the question that should be asked, but why we are asking the customer to provide an answer to that question and why it matters to provide an optimal solution.  

Questions marked with an asterisk (*) will likely require reaching out to a specialist/Solution Architect resource at Nutanix to go deeper with the customer on that topic/question.  Make sure you use the answers to these questions in the Scenario Objectives in Sizer when you create a new Scenario.  These questions should help guide you as to what the customer requirements, constraints, assumptions, and risks are for your opportunity.  

This is a live document, and the questions will be expanded and updated over time.

Revision History
2025.1  1st Revision – Kees Baggerman, Thomas Brown – 4-15-25
Nov 2020 Initial Publication – Lane Leverett

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Basic discovery

1. What is the expected type of EUC workload?
 

Why Ask? Are we talking about VDI (Full Desktop), RDSH (Shared Desktop), and Application Virtualization (like MSIX, App-V, or Horizon App Volumes).  Please keep in mind that you need to ask this question for every different workload the customer needs. In most EUC projects there is not just one type of user requirement. You will find a lot of mixed workloads, like persistent and non-persistent desktops as well as application virtualization.
NCI-VDI licensing can help if the customer wants to run resource-intensive VDI workloads, like developers or VDI with vGPUs and DR scenarios.  

For more information about NCI-VDI: https://www.nutanix.com/library/datasheets/nci-vdi  

 

 2. Which vendor is used to manage and broker Desktops and Apps?
 

Why ask? The main vendors are Citrix and Omnissa. Every vendor has its own display protocol, which makes a difference in CPU usage. Citrix = HDX, VMware = Blast, Blast Extreme  

3. What is the expected Operating System Version? 

Why ask? Every new version of Windows has higher CPU and Memory requirements. Comparing an older Windows version to the latest version can make a big difference.  

Windows 10 Performance Impact Analysis: https://portal.nutanix.com/page/documents/solutions/details?targetId=TN-2113-Windows-10-Performance-Impact:TN-2113-Windows-10-Performance-Impact 

Overall Performance Impact Analysis: 

End-User Computing Performance Impact Analysis 

4.  What Office version is used? 

Why ask? For Microsoft Office, it is the same issue as Windows versions. Newer versions need more resources.  Office 2019 Performance Impact Results from LoginVSI: https://www.loginvsi.com/login-vsi-blog/98-login-vsi/907-office-2019-performance-impact 

Overall Performance Impact Analysis: 

End-User Computing Performance Impact Analysis 

5. What other applications will be used? 

Why ask? The applications used have a strong impact on the CPU. There might be single-threaded applications that need high clock speed, or you run applications that are multi-threaded and need a higher core count. Think Microsoft Teams, Zoom but also specific LOB applications like the Epic client, CAD/CAM apps or Bloomberg Terminal.  

6. What is the expected type of user? 

Why ask? In sizer, we ask for user types: task, knowledge, power user or developer. Every user type comes with a specific workload profile – memory, # vCPUs, vCPU:pCPU ratio, disk size. Sometimes the customer can give you details on the VM sizing, but not on the expected vCPU:pCPU ratio. Depending on the workload expected you can set the ratio.  

For more information read here:  

• Login Enterprise Workloads 

• End-User Computing Performance Benchmarking Best Practices 

 

7. How many concurrent users will you have on that workload? 

Why ask? Concurrent user defines the number of active users. How many VMs need to run at the same time? Our VDI licensing is based on active VMs. You can have more users in an environment, but they can share resources if they don’t work on the platform at the same time.  This can impact how you size compute and memory but remember that storage may be needed for all possible users.  

8. What provisioning method is used? 

Why ask? Depending on the workload, the VMs can be persistent or non-persistent. Persistent desktops will be treated like normal VMs. Non-persistent VMs will have a different storage footprint since they share a single boot disk and have additional write cache disks, which will be deleted after a VM reboots. Citrix uses MCS (Machine Creation Service) or PVS (Provisioning). Omnissa uses  InstantClones. 

9. Where are the user profiles stored? 

Why ask? Using our own Files solution, we can provide storage for user profiles. Today, you will mostly encounter FSLogix profile containers or Citrix Profile Management, which still need an SMB share to be stored on and loaded during user logon. 

For more information: 

 

• FSLogix on Nutanix Files 

 

• Citrix User Profile Management on Nutanix

10. Do you need additional GPU support?  * (This may warrant engaging with a Solutions Architect or EUC Specialist for proper sizing and configurations) 

Why ask? To accommodate applications like CAD or requirements in number of monitors and high resolution you need to add NVIDIA GPUs. An overview of vGPU Profiles can be found here: 

•  Virtual GPU Software User Guide:: NVIDIA Virtual GPU Software Documentation  

• https://portal.nutanix.com/page/documents/solutions/details?targetId=SN-2046_vGPU_on_Nutanix:SN-2046_vGPU_on_Nutanix 

 11. Are there any other special requirements? 

Why ask? Does the customer need RF3? Block Awareness, Rack Awareness, Storage encryption or replication) 

VM Details

1. How many vCPUs? 

Why ask? The number of vCPUs impacts the performance of the VM and the density of the host. Solution Engineering found the sweet spot to be at 3 vCPUs for a Windows 10 desktop, 4 vCPUs for Windows 11 or 8 vCPUs for Windows Server based Desktops 

2. What is the ratio between vCPU to pCPU? 

Why ask? See question 6 

3. What is the requested CPU size per User? 

Why ask? How many MHz does every user need to run the workload? It is very rare that a customer can answer this. It is more common in application virtualization environments, where a number of users share the same VM and its resources. 

4. What CPU is currently in use? 

Why ask? If the CPU currently used can handle it, you could choose the same clock speed. But keep in mind that in a virtualized environment, resources are shared, and you might have additional tasks running, like Files, which can impact the CPU. 

5.  How much Memory is required per VM? 

6. What is the disk size? 

Why ask? Depending on the provisioning method used you need the size of the Master Image (also called parental disk or Sandbox) and the Write Cache per VM. The write cache stores the temporary files written during the VM is active. For persistent VMs you need the disk size of the Master Image, which is then cloned into separate VMs. 

7. Are you planning to use microsegmentation to secure your VMs? If yes, what solution will be used?  * (This may warrant engaging with a Flow or Networking specialist or Solutions Architect) 

Why ask? Position Flow on AHV or remember to size for a NSX appliance on every host. 

For more information: 

 

• Best Practices for Securing Citrix App and Desktop Deployments With Nutanix Flow Network Security Next-Gen 

 

8. Are you planning on using an App layering solution? 

Why ask? This saves the customer the need to manage many different master images. With App layering, you have one master image, and when a user logs in, the system will automatically attach additional disks containing the required applications. We can use shadow cloning to make those disks available locally. 

Read: 

 

• Citrix App Layering on Nutanix 

 

General supporting Infrastructure

1. What Hypervisor are you planning to use?

Why ask? Different Hypervisors have different needs. If the customer chooses VMware, we may need to accommodate vCenter. 

2. Where will generic required services run? 

Why ask? By generic services, we mean AD, DHCP, DNS, Printing, licensing or application backend services. Some of them might be running in the cloud or on existing infrastructure. If running on the Nutanix Cluster take note of size and see Server virtualization questions. 

 3. Where will user profiles, home shares or App disks (if used) be stored? 

Why ask? This is an opportunity to position Files. Today, customers usually use a profile container to store user profiles. FSLogix is the most common solution used by customers since it is included in their licensing. Please be aware that Files Services running on the same cluster do have a performance penalty during login times. 

4. What is your DR strategy? 

Why ask? Every customer needs a DR strategy for their EUC environment. A great question to position NC2 , replication and our unique VDI licensing approach.
Also need to calculate additional resources in your sizing, depending on the customer’s strategy. 

More information: 

Disaster Recovery for Citrix Virtual Apps and Desktops

Disaster Recovery for Citrix Desktop as a Service

Citrix Desktop as a Service on Nutanix Cloud Clusters on Microsoft Azure: Disaster Recovery

Citrix Desktop as a Service on Nutanix Cloud Clusters on Amazon Web Services: Disaster Recovery

 

Citrix Infrastructure

1. Where do you plan on running your Citrix services? 

Why ask? Customers can choose to run all Citrix-related services (like Studio, Databases, Storefront) as a service in the cloud, managed by Citrix, or on-premises. If the customer chooses to run the services on premises, he can still run it on a different infrastructure. If he chooses to run it on the same cluster, please size additional server virtualization VMs. Guidelines on VM requirements can be found here: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/system-requirements.html
If the customer chooses Citrix Virtual Apps and Desktop (CVAD) Service you still need an additional Windows server as a Cloud Connector.

A typical on-premises implementation would need the following servers:
SQL deployment. What type of HA? (Always On, SQL Clustering with WSFC)
StoreFront Servers (HA, N+1)
Citrix Desktop Studio and Director (N+1)
Optional Provisioning Server (PVS) (N+1)
Network Load Balancer
Global Server Load Balancing
Profile Management Infrastructure (File services)
AppLayering Infrastructure
Any Endpoint Management technologies?
Failure domain sizes (Prism Central sizing)
Dedicated Infra Management Cluster or part of the Citrix cluster 

VMware Infrastructure

1. Where do you plan on running your Omnissa Horizon Services? 

Why ask? Customers can choose to run all Horizon-related services as a service in the cloud, managed by VMware or on-premises. If the customer chooses to run the services on premises, he can still run it on a different infrastructure. If he chooses to run it on the same cluster, please size additional server virtualization VMs.  

Guidelines on VM requirements can be found here: https://docs.vmware.com/en/VMware-Horizon-7/7.12/horizon-installation/GUID-858D1E0E-C566-4813-9D53-975AF4432195.html 

A typical on-premises implementation would need the following servers:
SQL deployment. What type of HA? (Always On, SQL Clustering with WSFC)
Unified Access Gateway Appliances (N+1)
vCenter (N+1)
Horizon Connection Server (N+1)
Optional View Composer (N+1)
Profile Management Infrastructure (File services)
AppLayering Infrastructure
Any Endpoint Management technologies?
Failure domain sizes (Prism Central sizing) 

Advanced Discovery

1. How do you optimize your image? 

Why ask? Image optimization is crucial in all EUC environments. Optimizing the VM using tools provided by Citrix, VMware, or vendor-independent vendors increases the host density and user experience.
Citrix: https://support.citrix.com/article/CTX224676
VMware: https://flings.vmware.com/vmware-os-optimization-tool 

2. What is your Antivirus Strategy? 

Why ask? The right AV solution can also have a massive impact on user experience and host density. If not done correctly all file operations lead to file scans, which increase CPU and IO on the host