Chetan Gabhane

Horizon View 7 with Instant Clone on Hitachi Unified Compute Platform HC (UCP HC)

Blog Post created by Chetan Gabhane Employee on Apr 7, 2017

Many businesses are constrained by legacy IT infrastructure that is not well suited for VDI initiatives. Soiled data centers,composed of independent compute, storage, and networks with distinct administrative interfaces are inherently inefficient, cumbersome, and costly. Each platform requires support, maintenance, licensing, power, and cooling — not to mention a set of dedicated resources capable of administrating and maintaining these elements. Rolling out a new application like VDI becomes a manually intensive, time-consuming proposition involving a number of different technology platforms, management interfaces, and operations teams. Expanding system capacity can take days or even weeks, and requires complex provisioning and administration.Troubleshooting problems and performing routine data backup, replication, and recovery tasks can be just as inefficient.While grappling with this complexity, organizations also need to address challenges that are unique to VDI.

VDI Challenges

1.  Difficulty in sizing VDI workloads upfront, due to the randomness and unpredictability of user behavior.

2.  Periodic spikes in demand, such as “login storms” and “boot storms”, that may significantly

     degrade performance if not properly handled.

3.  High cost of downtime in the event of an outage.

Business benefit and Solution Value Propositions

Hitachi UCP HC addresses each of these challenges by providing a scalable, building block-style approach to deploying an infrastructure for VDI, offering the enterprise predictable costs, and delivering a high-performing desktop experience to end users. VDI Load Generation for this Solution, VDI Performance has been captured for Task, Knowledge and Power Users.


The reference architecture guide "VMware Horizon View 7 with UCP HC" is used to design a hyper-converged solution for VMware Horizon View 7 with Instant Clone on Hitachi Unified Compute Platform HC (UCP HC) for VDI environment. This describes the performance of Microsoft® Windows 10® Virtual Desktops and Microsoft RDSH remote sessions on a 4-node UCP HC compute vSAN cluster with a mixture of Power workers, Knowledge workers and Task workers using Instant Cloning features. This environment uses integrated servers, storage systems, and network with storage software in a unified compute converged solution for VDI environment. The 4-node UCP HC provides better performance and throughput with low latency.


The dedicated UCP HC nodes run ESXi 6.0 U2 with VMware vSAN 6.0 clusters using VMware Horizon View 7. This VDI environment solution uses Microsoft Windows 10 virtual desktops and Microsoft® Windows Server® 2012 R2 RDSH remote sessions.


This document is for the following audiences:

  • Corporate Desktop administrators
  • Storage administrators
  • IT help desk
  • IT professionals such as a Pre-sale solution team
  • Customer CIO


Logical Design

Figure shows the high-level infrastructure for this solution



There are two scenarios taken into consideration to capture the performance results separately. First, a Windows 10 VDI pool of 250 VMs was deployed and the results were captured. Later this pool was erased and the UCP HC  vSAN cluster was recreated to deploy a new RDS pool of 250 VMs to capture performance results separately.


Use Case
Duplication and Compression of UCP HC vSAN DatastoreDedup and Compressed vSAN datastore used for creating 250 Virtual Desktops

Dedup and Compressation ratio for 250 VMs is 4.19 times and saved space is 2.46 TB

Before : 3.23 TB, After : 789.16 GB

Boot Storm

Scenario 1 : Boot storm for 250 Windows 10 virtual desktop

Scenario 2: Boot storm for 250 Windows RDS machines

Scenario 1 result : Took 5 minutes to boot up

Boot IOPS peak    :  10,000

Boot IOPS Avg      :  6000

Avg read latency    :  35ms

Avg write latency    :  30ms


Scenario 2 result : Took 6 minutes to boot up

Boot IOPS peak    :  13,000

Boot IOPS Avg      :  5678

Avg read latency    :  35ms

Avg write latency    :  30ms

Login StormLogin to 250 virtual dektops using LoginVSI tool during logon period of 1-48 minLoginstorm duration was from 1-48 min and percent utilization peaks at approximately 72% and 66% for both scenarios respectively
Steady StateGenerated workload using LoginVSI for workload profile - Power, Knowledge, Task for both the scenarios with various microsoft applicationsSteady storm duration was from 48-50 min and percent utilization peaks at approximately 63% and 75% for both scenarios respectively
LoginVSI WorkloadLoginVSI workload profile is used to verify whether VSImax is reached for Power,Knowledge and Task UsersVSImax is not reached for Power, Knowledge and Task users in both the scenarios



Architecture provides guidance to organizations implementing VMware Horizon 7 on UCP HC infrastructure, and

describes tests performed by Hitachi Data Systems to validate and measure the operation and performance of the recommended solution, including third-party validated performance testing from Login VSI, the industry standard benchmarking tool for virtualized workloads.Organizations are looking to VDI solutions like VMware Horizon to reduce software licensing, distribution and administration expenses, and to improve security and compliance. The market-leading hyper-converged infrastructure platform from Hitachi Data Systems helps to deliver the promised benefits of VDI, while overcoming many common challenges.


Hitachi UCP HC for VDI provides:

  • Simplified deployment for a hyper-converged Infrastructure.
  • Ability to start small and scale out in affordable increments—from pilot to production.
  • Highest density of desktops per node in the hyper-converged infrastructure category.
  • Independently validated, unmatched VDI performance for a superb end user experience.
  • Deployment of full-clone desktops with the same data efficiency as linked clones.
  • Enterprise-class data protection and resiliency


Sincere thanks to  Jose Perez , Jeff Chen, Hossein Heidarian, Michael Nakamura for their vital contribution and making this paper possible.


Please Click Here to get reference architecture guide to VMware Horizon View 7 with UCP HC