Atlantis HyperScale VDI Reference Architecture With Citrix XenDesktop
Atlantis HyperScaleVDI ReferenceArchitecture withCitrix XenDesktopatlantiscomputing.com
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleTable of ContentsExecutive Summary . 3Introduction . 4Solution Overview . 5Why use Atlantis HyperScale for VDI? . 5Atlantis HyperScale Benefits . 6All-Flash Performance . 6Disruptive Costs . 6Freedom of Choice . 6Modular Scalability . 6Atlantis HyperScale Enterprise-Class Data Services . 7Data Reduction . 7IO Acceleration . 7Data Management . 7Data Mobility . 7Data Protection . 7Unified Storage . 7Disk Capacity with Atlantis HyperScale . 8Testing Methodology . 9VMware vSphere and vCenter . 9Atlantis HyperScale . 9Desktop Broker . 9Workloads and Login VSI Configuration . 10Provisioning Methodology. 10Virtual Desktop Configuration . 10Test Environment Overview . 11Benchmarking Tools . 13Login VSI v4.1.3 . 13Iometer . 13PassMark Performance Test 8.0. 13Test Results . 14Test Results Summary . 14VSIMax Login Test. 14Login VSI HA Test . 18Iometer Test . 20Passmark Performance Test . 21Conclusion . 22About the Authors . 23Atlantis HyperScale Citrix XenDesktop2
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleExecutive SummaryVirtual desktops have tremendous benefits in terms of mobility, employee productivity and security.However, user experience, the infrastructure cost and complexity are the three key challenges facing ITorganization deploying VDI. Atlantis HyperScale provides the server, storage and virtualized infrastructurerequired to achieve a better-than-PC user experience at a cost per desktop under 200 with the simplicity ofa turnkey appliance that can be deployed in 20 minutes.Altantis HyperScale with Citrix XenDesktopCharacteristicResultCostUnder 200 per VDI desktopDensity600 Desktops per appliancePerformanceLogin VSI baseline of 857mswith a Login VSI average 1089 (VSIMax Not Reached)AvailabilityQuick recovery from single node failureWith Atlantis HyperScale, IT can quickly deploy up to 600 Login VSI Knowledge Worker virtual desktops withall the storage and compute required on a single 4-node appliance. These desktops have the disk performanceof a MacBooks or Ultrabooks that come with a dedicated local SSD but cost less than 200 per desktop ininfrastructure, including servers, storage and networking. This sets a new VDI value standard, allowing avirtual desktop to be deployed at a lower initial cost than physical PCs. Atlantis HyperScale also offersfreedom of choice for server vendor, having defined appliance platforms based on 4 leading suppliers: Cisco,HP, Lenovo, and SuperMicro.In this reference architecture document, Atlantis provides detailed test results including Login VSI, PassMarkand Iometer benchmarks to test system scalability, performance and availability. In addition, Atlantis providesrecommendations on Atlantis HyperScale appliance models and density for specific stateless and persistentVDI scenarios. The Atlantis HyperScale high availability and data protection enabled 3 of the 4 nodes tocontinue running without disruption to the storage system. As part of the testing, Atlantis also performedresiliency tests to provide detailed densities of desktops that will be able to continue running during ahardware failure.Atlantis HyperScale Citrix XenDesktop3
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleIntroductionVirtual Desktop Infrastructure (VDI) is one of the fastest growing markets in the IT industry. IT departmentsare getting pushed to virtualize their desktop users to take advantage of centralized management, mobility,and security benefits. With the success of initial VDI projects and the diversity of the desktop user community,the requirements for virtual desktop performance better than physical PC is becoming a consistent ITrequirement. IT departments are faced with the demands to virtualize desktops that can provide a userexperience as good as or better than a consumer devices such as Macbooks or Ultrabooks that come with adedicated local SSD.Delivering a better-than-PC user experience is challenging from a storage perspective, especially whenattempting to deliver the thousands of IOPS available from a PC’s local SSD. To meet these challenges, AtlantisComputing has provided a storage architecture to meet the VDI performance requirements at a fraction ofthe cost of traditional storage solutions. The Atlantis USX architecture allows IT departments to meetperformance and cost requirements by providing nearly unlimited IOPS per desktop and 50GB per virtualdesktop of storage for over 600 persistent virtual desktops using a single 4-node Atlantis HyperScale hyperconverged appliance. For more than 600 users, IT organizations can scale out multiple appliances to deliverpredictable performance and cost per desktop.Atlantis HyperScale is a hyper-converged appliance based on Atlantis USX software-defined storagetechnology that can host virtual desktops with better performance than physical PC and reduce storagerequirements by up to 95% in virtual desktop environments of all types. The key is Atlantis HyperDup contentaware data services, which provide inline deduplication, compression and IO acceleration using memory. Theresults is more a better user experience in the form of faster boot times, application launches and searches,while as the same time driving down the cost per desktop to below a PC cost.Atlantis designed a test plan to validate the performance, scalability and reliability of the HyperScale applianceusing a combination of industry standard benchmarking tools such as Login VSI, PassMark and Iometer.The environment was tested with the following configuration: 600 concurrent persistent virtual desktops running simulated desktop workloads generated by Login VSIv4.1 1 Atlantis HyperScale appliance (4 nodes) running with Citrix XenDesktop 7.6Atlantis HyperScale Citrix XenDesktop4
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleSolution OverviewWhy use Atlantis HyperScale for VDI?Atlantis HyperScale is an allflash,hyper-convergedappliance that provides all thecompute,storageandnetworking you need todeploy VDI, delivering higherperformance and lower costdesktops than traditional PCs.Instead of piecing togethercostly and complex SAN, NASor all-flash array storage withservers, Atlantis HyperScale isalow-footprint,fullyintegrated computeandstorage solution that comespreconfigured with Citrix orVMware hypervisors. Within60minutes,asimpleconfiguration process sets upthe required infrastructure to deploy more than 600 virtual desktops per appliance. Atlantis HyperScale iseasily scalable and runs on your preferred hardware platform, minimizing data center complexity. Also, theappliances come with a single point of support and maintenance with 3 year, 24x7x365 coverage and 4 hoursparts replacement.Atlantis HyperScale Citrix XenDesktop5
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleAtlantis HyperScale BenefitsAll-Flash PerformanceAtlantis HyperScale delivers the performance of an all-flash array in every appliance,enabling IT organizations to meet the performance requirements of any workload.Atlantis HyperScale features award-winning patented software-defined storagetechnology that performs in-memory in-line deduplication before data is written tostorage, leading to extremely low latencies, high IOPS and lower storage networktraffic.Disruptive CostsAtlantis HyperScale hyper-converged appliances cut datacenter infrastructure costs by50-90%, while delivering All-Flash performance. Atlantis reduces costs by using itspatented data reduction and IO acceleration technology to reduce the amount ofphysical RAM and local flash required per TB of storage capacity. Based on industrystandard x86 server hardware, Atlantis HyperScale eliminates the need for expensiveproprietary hardware or multiple tiers of flash and hard drives required by otherhyper-converged appliances.Freedom of ChoiceAtlantis HyperScale gives enterprises the freedom to use their preferred server andhypervisor platforms, eliminating complexity and additional investments in training,time and tools. This enables customers to simplify their datacenters and preventvendor lock-in. Atlantis HyperScale is the only hyper-converged appliance available onfour leading server platforms and multiple hypervisors.More information on each server platform is available on the Atlantis SpecificationsData SheetData SheetData SheetData SheetModular ScalabilityInstead of buying large and expensive storage arrays that have limited performance,Atlantis HyperScale enables enterprises to scale storage in small modular units as theygrow their compute resources. Atlantis HyperScale delivers the performance of an allflash array in every appliance with 12 or 24 TB of capacity, enabling customers to scaleout performance and capacity to meet any application requirement.Atlantis HyperScale Citrix XenDesktop6
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleAtlantis HyperScale Enterprise-Class Data ServicesData ReductionAtlantis HyperScale provides patented, real-time, in-line deduplication, compression and thin provisioning toreduce the capacity required to store data by up to 90%. The Atlantis HyperScale Storage Guarantee ensuresthat customers receive at least 70% data reduction.IO AccelerationAtlantis HyperScale process IO in-memory before writing to its primary storage tier of local flash. This inmemory storage technology accelerates storage by minimizing the data that must traverse the network andbe serviced by flash.Data ManagementAtlantis HyperScale automates the tiering of data between memory and local flash to simplify datamanagement. In additional, Atlantis HyperScale features Fast Clone , providing the capability to instantlyprovision full clone VMs in seconds without consuming additional storage capacity.Data MobilityAtlantis HyperScale provides intelligent volume-to-volume rapid migration of files and VMs through a unique,patent-pending, capability called Teleport . An industry first, Teleport moves data between two virtualvolumes by reconstructing the data on the target volume from existing duplicate blocks, enabling VMs to bemoved between volumes in a matter of seconds even across low-bandwidth high-latency connections.Data ProtectionAtlantis HyperScale has integrated High Availability and data protection capabilities that are highly resilientand can sustain a drive failure, node failure or any individual component of the storage system. AtlantisHyperScale is pre-configured with volume-level high availability and data protection that allows for one offour nodes in the appliance to fail without affecting the datastores on the system. Even if the entire applianceloses power, all data is protected and consistent with a journaled file system. With Atlantis HyperScaleappliance that feature high-endurance Intel Flash (10 drive writes per day), the reduced amount of datawritten to local flash provides better storage media endurance than other hyper-converged appliances.Unified StorageAtlantis HyperScale enables customer to create both file and block based storage volumes exported as NFSor iSCSI datastores in the hypervisor.Atlantis HyperScale Citrix XenDesktop7
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleDisk Capacity with Atlantis HyperScaleWe tested 600 Knowledge Worker virtual desktops, which would normally require 30TB of storage capacityin total. When deploying desktop workloads on the Atlantis HyperScale, we observed only 238 GB of physicalstorage consumed, representing over 99% data capacity reduction. The HyperScale CX-12 appliance provides12TB of effective all-flash storage capacity based on a 70% data reduction storage guarantee, delivering muchmore storage capacity than the test environment required. However, in real world VDI deployment scenarios,data reduction rates may vary with an average between 80-90%.The highest rate of data reduction (typically 85-90%) is expected for stateless desktops, so we can recommendthe HyperScale CX-12 appliance for that scenario. For persistent desktops, more unique data is typical,resulting in an 80-85% data reduction rate, requiring the HyperScale CX-24 to provide all the storage requiredfor 600 50GB knowledge worker desktops. Please see the table below for more information.VDI Desktops and Appliance RecommendationsHyperScale ApplianceDesktopTypeHyperScale CX-12 (384 GB RAM)StatelessAny85% 600HyperScale CX-24 (384 GB RAM)PersistentKnowledge Worker80-85%600Atlantis HyperScale Citrix XenDesktopUser ProfileExpectedDeduplicationMax. Numberof Desktops8
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleTesting MethodologyA series of various tests were conducted to validate the performance, scalability and reliability of AtlantisHyperScale for VDI workloads. These tests were designed to replicate recommended configurations forproduction environments instead of pushing the system to its breaking point.For the first phase of the test, the Login VSI Testing Solution was used to evaluate expected serverperformance for scaling and sizing a virtual desktop environment. This test focused on leveraging persistentdesktops showcasing an increase in system performance and stability, while dramatically reducing storagecosts. During this test, system metrics including CPU, memory, and disk performance and size were measuredto validate the performance, scalability and reliability of Atlantis HyperScale when used as the infrastructurefor VDI deployments.The second phase was conducted to demonstrate the raw standalone storage performance that AtlantisHyperScale provides, leveraging Iometer and Passmark configured to simulate VDI workloads. These testdemonstrate the overall disk performance provided by Atlantis HyperScale.VMware vSphere and vCenterVMware vSphere 5.5 Update 2 was installed on all 4 nodes hosting the VDI desktops. vCenter 5.5 was alsoused to manage all four hosts and was installed on a separate infrastructure server. Performance metrics forthe vCenter server were not measured for this test. At the time of this writing, XenDesktop 7.6’s highestvSphere support is 5.5 Update 2 and was the primary driving factor for leveraging this version to conduct thetests. vCenter DRS capabilities were not leveraged during the test, however vCenter HA capabilities wereused for conducing the HA test. VMware tools were installed into each VM, and no additional performanceoptimizations were performed than the default configurations for vCenter, vSphere, and the VMs.Atlantis HyperScaleAtlantis HyperScale is a turnkey appliance that is pre-installed and configured with a hypervisor and AtlantisUSX storage volumes. When the customers receives the Atlantis HyperScale appliance, a simple installationwizard guides they through the process of entering system, networking and configuration information tofinalize the setup of the hyper-converged infrastructure. Detailed configuration is provided below. Fourservice VMs are pre-installed along with four volume VMs. While only three of each are necessary forfunctionality, the goal of these tests were to simulate a production environment that would incorporate HighAvailability with the resiliency than enables one of the four nodes to fail without disruption to the system.Atlantis HyperScale comes preconfigured with three storage volumes. These three volumes provide aguaranteed effective storage capacity of 12TB, assuming the conservative 70% deduplication percentageestimate. When deduplication rates are above 70%, customer can take advantage of the additional storagecapacity.Desktop BrokerFor this test, XenDesktop 7.6 was used to broker the Login VSI launcher machines to their respective desktopsession. The XenDesktop Delivery Controller, StoreFront, and Citrix Licensing server were all installed on asingle node. The XenDesktop 7.6 database was configured on a separate VM running SQL Express 2014. Forthe purposes of this test, no metrics were measured regarding the broker or database server’s resourceconsumption. There were no session policies configured on the Delivery Controller for XenDesktop, thereforeall connections were established leveraging the default standard configuration from Citrix with no additionaloptimizations.Atlantis HyperScale Citrix XenDesktop9
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleWorkloads and Login VSI ConfigurationThe Login VSI 4.1.3 Knowledge Worker workload was used to conduct the tests. The VMs were balancedacross each of the servers, keeping a consistent number of VMs on each node.For the Login VSI Max test, 40 Login VSI launchers were used, launching approximately 15 sessions per host.The Login VSI launcher was configured to launch a new session every 20 seconds via the XenDesktopStoreFront and Controller components. All VDI desktops were powered on, registered, and idle prior tobeginning the test.For the High Availability test, 40 Login VSI launchers were used as well, launching approximately 13 sessionsper host. This test also was configured to launch a new session every 20 seconds via XenDesktop. Once allthe VDI desktops were logged in, the fourth node was powered off to simulate a node failure event. Thiscaused VMware vCenter to recognize the VMs were in a failed state, and vCenter proceeded to automaticallypower on the virtual desktops on the remaining three nodes. This test allowed for observing the behavior inthe event of a failed node.Provisioning MethodologyThree VM templates were created and placed on each one of the preinstalled volumes. Scripts were thenleveraged to automate the provisioning and cloning of these templates into their respective HyperScalevolumes. In addition, the scripts would inject the computer name while adding the machine to the domainat first boot leveraging the Atlantis agent installed into the OS of the VM template. Each machine was bootedand staged prior to the VSI Login tests to prevent any additional IO that would already be performed in atraditional production environment. Machines were then added to the XenDesktop Delivery Controller viaCSV files associating the VDI VM with the AD computer account.Virtual Desktop ConfigurationThe virtual desktops were persistent images installed with Windows 7 (64-bit) and Office 2007. Othermiscellaneous software required to run the Login VSI 4.1.3 test were also installed. Each desktop VM’sattached disk running Windows was placed onto one of three available Atlantis HyperScale volumes (defaultAtlantis HyperScale configuration). The Citrix XenDesktop 7.6 VDA was installed without the desktopoptimizations being used and no additional optimizations were performed. More detailed VDI VMconfiguration information can be viewed below.Atlantis HyperScale Citrix XenDesktop10
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleTest Environment OverviewSo ft war e C om p on en t sComponentDescriptionVDI Broker and ClientCitrix XenDesktop 7.6HypervisorVMware ESXi 5.5 U2Atlantis HyperScaleAtlantis USX 2.2.1.38Benchmarking/Load Gen.Login VSI 4.1.3Hard wa re C o mp on en t s – 4 Nod e s T ota lComponentQuantityDescriptionProcessor (Per Node)2Intel Xeon 12C E5-2680v3 120W 2.5GHz/2133MHz/30MB (12cores/socket)Networking (Per Node)1Dual Port - Emulex VFA5 ML2 10GbE SFP AdapterNetworking (Per Node)1Quad Port - BCM5719 Broadcom RJ-45 Gigabit Ethernet1000BASE-TRAM (Per Node)384GB16GB TruDDR4 (2 Rx4, 1.2V) PC4-17000 CL15 2133MHz (x24modules)Disk (Per Node)1.2TBIntel S3700 400GB SATA 2.5” MLC G3HS Enterprise SSD (x3drives)Effective Capacity12TBAtlantis HyperScale appliance effective capacityAtlantis HyperScale Citrix XenDesktop11
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleVD I V M Con f igu rat ionComponentQuantityDescriptionOperating SystemXWindows 7 SP1 – 64-bitvCPU22 virtual sockets, 1 core per socketNetworking11GB – Management NetworkRAM2GBDisk40GBVM disk stored on the Atlantis HyperScale VolumesAtl an ti s U SX Ma n ag e r - Up d a teComponentQuantityDescriptionvCPU22 virtual sockets, 1 core per socketNetworking11GB - Management NetworkRAM6GBDisk22GBDisk stored local SSDAtl an ti s Hy p er Sc al e Se r v ic e VM Co n f igu rat ionComponentQuantityDescriptionvCPU11 core reserved, 3 additional allocatedNetworking210GbE SFP NIC, (Storage Network)1Gb (Management Network)RAMDisk10GB10GBVM disk on local SSD, Second disk size based on storageremainingAtl an ti s Hyp er Sc al e Vol u m e Con fi gu r ati onComponentQuantityDescriptionvCPU11 core reserved, 3 additional allocatedNetworking210GbE SFP NIC, (Storage Network)1Gb (Management Network)RAM73GBDisk10GBVM Disk stored on local SSDAtlantis HyperScale Citrix XenDesktop12
Citrix XenDesktop Reference Architecture with Atlantis HyperScaleBenchmarking ToolsLogin VSI v4.1.3Login Virtual Session Indexer (Login VSI) is the de-facto industry standard benchmarking tool to test theperformance and scalability of centralized Windows desktop environments like Server Based Computing (SBC)and Virtual Desktop Infrastructures (VDI). Login VSI is 100% vendor independent and is used to test virtualdesktop environments like Citrix XenDesktop and XenApp, Microsoft VDI and Remote Desktop Services,VMware Horizon or any other Windows based SBC or VDI architecture.Login VSI is also the standard tool used in all tests that are executed in the internationally acclaimed ProjectVirtual Reality Check (www.projectvrc.com).For more information about Login VSI, or a free test license, visit www.Login VSI.comIometerIometer is an I/O subsystem measurement and characterization tool for single and clustered systems. It isused as a benchmark and troubleshooting tool and is easily configured to replicate the behavior ofapplications. In this test, Iometer was configured to simulate a VDI workload and determine the maximumavailable IOPS of Atlantis HyperScale environment. The VDI workload tested was configured to be 80% write,20% read and 80% random with a 4K block size using a 20GB test file. A virtual machine with Iometer was runwith this test profile determine the maximum available IOPS for Atlantis HyperScale Solution.For more information on how to use Iometer to test desktop workload, ssMark Performance Test 8.0Performance Test is a benchmarking tool designed to measure the performance of physical PCs. Using thetest, virtual desktop disk performance can be compared with hard drives of different types of physical PCsthat have been previously benchmarked by individuals and uploaded to the PassMark database. ThePerformance Test Disk Mark test measures the data transfer speed when reading or writing
In this reference architecture document, Atlantis provides detailed test results including Login VSI, PassMark and Iometer benchmarks to test system scalability, performance and availability. In addition, Atlantis provides recommendations on Atlantis HyperScale appliance models and density for specific stateless and persistent VDI scenarios.
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VDI with 70 clients the consumed power will be 5611.667/8hours (watts) in a day. So, VDI energy saving is about 89%. Fig. 2 Power consumption versus saving 4. Cost Comparison between Traditional Desktop and VDI based Solution To calculate the cost of the VDI based solution for one terminal over a period of time, we used the following
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at 75 users based on the HP ProLiant DL380p Gen8 server and Citrix VDI-in-a-Box . The reference architecture—the HP Client Virtualization SMB Reference Architecture for Citrix VDI-in-a-Box (HP CV SMB RA for Citrix)—is an appliance-like configuration that removes the guesswork from sizing and deploying a virtual desktop solution.
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