IBM SmartCloud Desktop Infrastructure: Citrix XenDesktop on IBM Flex System

IBM Redbooks Solution Guide


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Abstract

The IBM® SmartCloud™ Desktop Infrastructure offers robust, cost-effective, and manageable virtual desktop solutions for a wide range of clients, user types, and industry segments. These solutions to help increase business flexibility and staff productivity, reduce IT complexity, and simplify security and compliance. Based on a reference architecture approach, this infrastructure supports various hardware, software, and hypervisor platforms.

The IBM SmartCloud Desktop Infrastructure solution with Citrix XenDesktop running on IBM Flex System™ offers tailored solutions for every business. These solutions range from the affordable all-in-one Citrix VDI-in-a-Box for simple IT organizations to the enterprise-wide Citrix XenDesktop. XenDesktop is a comprehensive desktop virtualization solution for every user with multiple delivery models that is optimized for flexibility and cost efficiency.

This IBM Redbooks® Solution Guide provides an overview of the IBM SmartCloud Desktop Infrastructure solution with Citrix XenDesktop running on IBM Flex System. It highlights the key components, architecture, and benefits of this solution. It also provides integration scenarios and ordering and fulfillment information.

Changes in the May 29 update:
* Added Intel Xeon processor E5-2600 v2 based x240 building blocks
* Added Intel Xeon processor E5-2400 based x222 building blocks
* Added IBM Storwize V7000 and V7000 Storage Node storage building blocks
* Updated reference configurations

For related information about this topic, refer to the following IBM Redbooks publication:
Implementing Citrix XenDesktop on IBM Flex System, SG24-8163-00

Contents


The IBM® SmartCloud™ Desktop Infrastructure offers robust, cost-effective, and manageable virtual desktop solutions for a wide range of clients, user types, and industry segments. These solutions can help to increase business flexibility and staff productivity, reduce IT complexity, and simplify security and compliance. Based on a reference architecture approach, this infrastructure supports various hardware, software, and hypervisor platforms. Figure 1 illustrates the SmartCloud Desktop Infrastructure offering.

IBM SmartCloud Desktop Infrastructure offering

Figure 1. The IBM SmartCloud Desktop Infrastructure offering

The SmartCloud Desktop Infrastructure solution with Citrix XenDesktop running on IBM Flex System™ offers tailored solutions for every business. Citrix XenDesktop is a comprehensive desktop virtualization solution with multiple delivery models that is optimized for flexibility and cost efficiency.


Did you know?

The hosted virtual desktop (HVD) approach is the most common form of implementing a virtualized user desktop environment. With HVDs, all applications and data that the user interacts with are stored centrally and securely in the data center. These applications never leave the data center boundaries. This setup makes management and administration much easier and gives users access to data and applications from anywhere and at anytime.


Business value

Several key factors drive virtual desktops in today’s business climate:

  • Data security and compliance concerns
  • Complexity and costs of managing existing desktop environments
  • An increasingly mobile workforce
  • The changing ownership of end-point devices with bring-your-own-device (BYOD) programs
  • The need for rapid recovery from theft, failure, and disasters

SmartCloud Desktop Infrastructure offers the following advantages:
  • Lowers the TCO over an extended period compared to traditional PCs
  • Simplifies desktop administration, support, and management
  • Enhances security and compliance management
  • Improves availability and reliability
  • Enables users to work anytime, anywhere quickly and easily regardless of location or device
  • Better supports growth initiatives for mobility and flexible work locations


Solution overview

IBM SmartCloud Desktop Infrastructure solution with Citrix XenDesktop on IBM Flex System includes the following components:
  • User access devices
    • Desktop PCs
    • Thin clients
    • Notebooks
    • Other handheld mobile devices
  • Virtual infrastructure software
    • Citrix XenDesktop
  • Hardware platform
    • IBM Flex System
    • IBM System Storage®
  • Integration services
    • Assess and plan
    • Design
    • Implement
    • Operate and manage

Figure 2 shows the functional components of the SmartCloud Desktop Infrastructure solution.

IBM SDI solution functional components
Figure 2. Functional components of the SmartCloud Desktop Infrastructure solution

The SmartCloud Desktop Infrastructure solution consists of three functional layers:
  • User access layer
    The user access layer is a user entry point into the virtual infrastructure. It includes traditional desktop PCs, thin clients, notebooks, and other handheld mobile devices.
  • Virtual infrastructure services layer
    The virtual infrastructure services layer provides the secure, compliant, and highly available desktop environment to the user. The user access layer interacts with the virtual infrastructure layer through display protocols. The choice of HDX, RDP, and ICA display protocols is available in Citrix XenDesktop.
  • Storage services layer
    The storage services layer stores user persona, profiles, gold master images, and actual virtual desktop images. The storage protocol is an interface between the virtual infrastructure services and storage services. The storage protocols include iSCSI, Fibre Channel (FC), and Fibre Channel over Ethernet (FCoE).

The virtual infrastructure services layer has the following key functional components:
  • Hypervisor

    The hypervisor provides a virtualized environment for running virtual machines (VMs) with the desktop operating systems in them. These VMs are called hosted virtual desktops.

  • Hosted virtual desktops

    An HVD is a VM that runs a user desktop operating system and applications.

  • Connection broker

    The connection broker is the point of contact for the client access devices that request the virtual desktops. The connection broker manages the authentication function and ensures that only valid users are allowed access to the infrastructure. When authenticated, it directs the clients to their assigned desktops. If the virtual desktop is unavailable, the connection broker works with the management and provisioning services to have the VM ready and available.

  • Management and provisioning services

    Management and provisioning services allow the centralized management of the virtual infrastructure, providing a single console to manage multiple tasks. These services provide image management, lifecycle management, and monitoring for hosted VMs.

  • High availability services

    High availability (HA) services ensure that the VM is up and running even if a critical software or hardware failure occurs. HA can be a part of connection broker functions for stateless HVDs or a separate failover service for dedicated HVDs.


A dedicated (or persistent) HVD is assigned permanently to the specific user (similar to a traditional desktop PC). Users log in to the same virtual desktop image every time they connect. All changes that they make and each application that they install are saved when the user logs off. The dedicated desktop model is best for users who need the ability to install more applications, store data locally, and retain the ability to work offline.

A stateless (pooled or non-persistent) HVD is allocated temporarily to the user. After the user logs off, changes to the image are discarded (reset). Then, the desktop becomes available for the next user, or a new desktop is created for the next user session. A persistent user experience (the ability to personalize the desktop and save data) is achieved through user profile management, folder redirection, and similar approaches. Specific individual applications can be provided to non-persistent desktops by using application virtualization technologies, if required.

Figure 3 shows the logical connectivity topology that supports the VDI solution.

VDI solution logical connectivity topology
Figure 3. VDI solution logical connectivity topology

Three networks are defined in the VDI solution:
  • Storage network. Carries storage traffic between VDI servers and the NAS storage system.
  • Management network. Supports management, provisioning, and monitoring tasks.
  • Client network. Connects VDI clients (users) to VDI servers.

Functional layers and components are supported by a hardware infrastructure platform that must provide the following features:
  • Sufficient computing power to support demanding workloads
  • Scalability to satisfy future growth requirements
  • Reliability to support business continuity and 24x7 operations
  • High-speed low-latency networking for better user experience
  • Cost-efficient storage to handle large amounts of VM and user data
  • Centralized management of combined physical and virtual infrastructure from a single user interface to simplify and automate deployment, maintenance, and support tasks

IBM Flex System is a future-proof, integrated platform that satisfies these requirements.


IBM Flex System platform

IBM Flex System is an integrated platform that delivers custom-tuned client-specific configurations for optimum flexibility. It combines compute nodes, networking, storage, and management into a complete data center building block that is built for future-proof, heterogeneous data centers with flexibility and open choice of architectures, hypervisors, and environments.

Figure 4 shows the IBM Flex System.

IBM Flex System
Figure 4. IBM Flex System

IBM Flex System offers unique capabilities that make this platform an exceptional choice for the deployment of the SmartCloud Desktop Infrastructure solution:
  • Compute nodes

    Compute nodes provide sufficient processing capacity for the most demanding SmartCloud Desktop Infrastructure deployments to provide scalable, high-density VDI deployments. IBM Flex System x240 is a dual-socket Intel Xeon processor E5-2600 v2 product family-based compute node. It supports up to two processors, up to 768 GB of memory, and up to 16 physical I/O connections. IBM Flex System x222 is a high-density Intel Xeon processor E5-2400 product family-based compute node. Each half-height server supports up to two processors, up to 384 GB of memory, and up to four physical I/O connections.

  • Networking

    SmartCloud Desktop Infrastructure requires sufficient network bandwidth and efficient traffic management to host as many VMs as possible to ensure that all computing resources are not underused. IBM Flex System networking, when integrated into a chassis, can help to reduce communication latency and provide the required bandwidth with 10 Gb Ethernet LAN connectivity that has 40 Gb uplinks and 8 Gb or 16 Gb FC SAN connectivity. Virtual Fabric Adapters offer virtual network interface card (NIC) capability to allow up to 64 logical ports on a single compute node, with controllable bandwidth allocation to manage traffic prioritization. In addition, the integrated design simplifies the overall infrastructure to save costs and make scalability and management tasks easier.

  • Management

    IBM Flex System Manager™ is a systems management appliance that drives efficiency and cost savings in the data center. Flex System Manager provides a pre-integrated and virtualized management environment across servers, storage, and networking that is easily managed from a single interface. A single focus point for seamless multichassis management provides an instant and resource-oriented view of chassis and chassis resources for IBM System x® and IBM Power Systems™ compute nodes. You can reduce the number of interfaces, steps, and clicks it takes to manage IT resources. You can intelligently manage and deploy workloads based on resource availability and predefined policies. And you can manage events and alerts to increase system availability and reduce downtime in addition to reducing operational costs.

  • Storage

    As virtualized storage systems, external IBM Storwize® V7000 and integrated IBM Flex System V7000 Storage Node complement virtual desktop environments. These systems offer robust enterprise-class storage capabilities, which include thin provisioning, automated tiering, internal and external virtualization, clustering, replication, multiprotocol support, and a next-generation graphical user interface (GUI). These features can be applied in virtual desktop environments, for example, to optimize storage capacity and performance or to simplify desktop user profile management and backup. The Storwize V7000 and V7000 Storage Node are flexible enough to support entry virtual desktop environments, but can also be scaled to support enterprise virtual desktop environments.


In summary, because of its integrated capabilities, IBM Flex System in a SmartCloud Desktop Infrastructure solution can help to achieve the following advantages:
  • Better VM density due to large memory and I/O capacity support
  • Lower communication latency due to integrated switching capabilities for a better user experience
  • Simplified deployment and management of both physical and virtual infrastructures due to integrated design and IBM Flex System Manager capabilities


Solution architecture

IBM SmartCloud Desktop Infrastructure with Citrix XenDesktop can help to transform Microsoft Windows desktops, applications, and data into a cloud-type service that is accessible on virtually any device, anywhere. Citrix offers tailored solutions that range from the affordable, all-in-one Citrix VDI-in-a-Box for simple IT organizations to the enterprise-wide Citrix XenDesktop. XenDesktop is a comprehensive desktop virtualization solution for every user with multiple delivery models that are optimized for flexibility and cost efficiency. Both solution types deliver a rich, high-definition user experience across any network that uses Citrix HDX technologies.

By using the open architecture of Citrix XenDesktop, customers can adopt desktop virtualization quickly and easily with any hypervisor, storage, or management infrastructure.

The following Citrix XenDesktop features provide a familiar experience for the user:
  • Multiple monitor support
  • 3D graphics business application support
  • Multimedia support
  • Printing from a virtual desktop
  • Accessing USB devices and other peripheral devices
  • Roaming user profiles

Citrix XenDesktop offers several levels of security features, including the following features:
  • Multifactor authentication
  • Traffic encryption
  • Built-in password management
  • SSL tunneling to ensure that all connections are encrypted

The following Citrix XenDesktop features provide centralized administration and management:
  • Microsoft Active Directory
  • Web-based administrative console
  • Automated desktop provisioning and storage optimization

Citrix XenDesktop includes the following scalability, integration, and optimization features:
  • VMware vSphere, Microsoft Hyper-V, and XenServer hypervisor support
  • Integration with VMware vCenter to achieve cost-effective densities, high levels of availability, and advanced resource allocation control for virtual desktops
  • Automated provisioning of desktop images that share virtual disks with a master image

Figure 5 shows the components of the Citrix XenDesktop on IBM Flex System solution.

IBM SDI with Citrix XenDesktop solution components
Figure 5. Components of the Citrix XenDesktop on IBM Flex System solution

The core hardware component of the solution is IBM Flex System with integrated x86 compute nodes, LAN switches and management appliance, and the external storage system:
  • IBM Flex System x86 compute nodes

    The IBM x86 compute nodes contain an embedded VMware ESXi hypervisor to host VMs that are used for virtual desktops and for management and provisioning tasks. The compute nodes are combined into three groups: stateless HVD pool, dedicated HVD cluster, and management cluster.

    Stateless HVD pool nodes are configured with local SSD storage that hosts VM files. The nodes use storage protocol (iSCSI, FC, or FCoE) to get local VM images from the repository. High availability is provided by the connection broker (XenDesktop Controller). That is, if a VM or node failure occurs, the connection broker redirects the user to another available virtual desktop.

    The nodes in a dedicated cluster are configured with no local storage. All VM files are placed onto a shared storage. High availability is provided by failing over the VM to another compute node with the VMware High Availability feature.

    The nodes in management cluster host VMs are running controlling instances, such as connection broker, centralized management tools, and database for storing control information. These nodes are connected to a shared storage, such as V7000 Storage Node, that stores VM files. Also, VMware HA provides high availability for management VMs.

  • LAN switches

    The IBM Flex System Fabric EN4093R 10Gb Scalable Switches provide a redundant, high-speed, low-latency 10 Gb Ethernet network and FCoE (as a transit switch) or iSCSI storage connectivity for the compute nodes. For end-to-end FCoE connectivity, IBM Flex System Fabric CN4093 10Gb Scalable Switches can be used. For end-to-end FC connectivity, either IBM Flex System FC5022 16Gb SAN Scalable Switches or IBM Flex System FC3171 8Gb SAN Switches or Pass-thru can be used.

  • IBM Flex System Manager

    IBM Flex System Manager is a systems management appliance that drives efficiency and cost savings in the data center. Flex System Manager provides a pre-integrated and virtualized management environment across servers, storage, and networking that is easily managed from a single interface.

  • IBM Storwize V7000 or IBM Flex System V7000 Storage Node

    IBM Storwize V7000 and IBM Flex System V7000 Storage Node are virtualized software defined storage systems that are designed to consolidate workloads into a single storage system for simplicity of management, reduced cost, highly scalable capacity, performance and high availability. These systems offer improved efficiency and flexibility through built-in flash storage optimization, thin provisioning and non-disruptive migration from existing storage. They can also virtualize existing disk systems for a better return on investment.


The Citrix XenDesktop core services have the following software components:
  • Citrix Receiver

    Citrix Receiver is a client software for accessing virtual desktops by using the Independent Channel Architecture (ICA) protocol. The client software can run on different types of user access devices, including desktop PCs, notebooks, thin clients, and others.

  • Citrix Virtual Desktop Agent

    Citrix Virtual Desktop Agent is installed on virtual desktops and supports Citrix Receiver direct connections through the ICA.

  • Citrix XenDesktop Controller

    Citrix XenDesktop Controller is a software service that is responsible for connection brokering, authenticating users, and starting virtual desktops and user persona management if required. Authentication of users is performed through Windows Active Directory.

  • Citrix Provisioning Services or Machine Creation Services

    Citrix Provisioning Services and Machine Creation Services create and provision virtual desktops from desktop images. Provisioning Services support stateless HVD pools, and Machine Creation Services can support both stateless and dedicated HVD pools.

  • Citrix License Server

    Citrix License Server manages licenses for all XenDesktop components.

  • Citrix Data Store

    Citrix Data Store is a database that stores configuration information for the XenDesktop environment.

  • VMware ESXi

    VMware ESXi is hypervisor that is used to host VMs.

  • VMware vCenter

    The VMware vCenter service acts as a central administrator for VMware ESX or ESXi servers that are connected on a network. vCenter Server provides a central point for configuring, provisioning, and managing VMs in the data center.



Usage scenarios

In the healthcare industry, staff are constantly on the move, but need fast, security-rich access to patients’ electronic medical records that are in compliance with data privacy regulations. By combining single sign-on capabilities with a virtual desktop infrastructure, healthcare staff can access multiple systems and applications to obtain medical records or images with a single, more secure sign-on.

In the education industry, a virtual desktop infrastructure can help schools to extend the lifecycle of existing PCs, in addition to allowing the schools to adopt new technology. Students can receive the same quality of education, regardless of the availability of hardware, device or location. At the same time, IT staff can reduce the time, cost, and complexity that are associated with maintenance, upgrades, provisioning, reimaging, and repairing the school’s technology assets.

For the public sector, local, state, and federal agencies must extend support to an ever-increasing collection of personal devices and do so under stringent security measures. A virtual desktop can give personnel the anytime, anywhere access they need to maintain productivity. It can also provide the centralized security and control that are necessary to help maintain extreme data confidentiality. Agencies can also expedite provisioning and upgrades to multiple devices at a sustainable level of cost and effort.


Integration

IBM SmartCloud Desktop Infrastructure enables easy integration with optional security and endpoint management technologies, including the following technologies:
  • IBM Security Access Manager for Enterprise Single Sign-On offers streamlined user access with automated sign-on and sign-off plus a single password for all applications. This technology can reduce help desk costs, improve productivity, and strengthen security for virtualized desktops.
  • IBM Tivoli® Endpoint Manager combines endpoint and security management into a single solution. With this solution, your team can see and manage physical and virtual endpoints, such as servers, desktops, roaming notebooks, and specialized equipment such as point-of-sale devices, automated teller machines (ATMs), and self-service kiosks.

IBM SmartCloud Desktop Services

Transitioning to a virtualized environment from traditional desktops can be a time-consuming effort, often requiring specialized skills that are not readily available in-house. You must carefully manage implementations to support many users, applications, and complementary software to help provide the security and management functions that are necessary to succeed.

By using time-proven methods, proprietary tools, and extensive expertise that are developed through real-world client implementations, SmartCloud Desktop Services can accelerate your transition to a less complex, virtualized desktop environment. Robust services, which include assessment and planning, design and implementation, and operation and management, in addition to a phased delivery approach, help to speed your return on investment and reduce the risk of business disruption. Through these services, a broader range of users, from power users to disconnected users, can have faster, more security-rich access to resources, helping to improve their productivity and increasing business flexibility.

Figure 6 illustrates the services approach.

IBM SmartCloud Desktop Services
Figure 6. SmartCloud Desktop Services


Reference design

The Citrix XenDesktop on IBM Flex System solution has the following key building blocks:
  • Compute nodes that support stateless and dedicated HVD pools
  • Compute nodes cluster that runs management and provisioning tasks
  • Integrated management appliance
  • Shared storage system (external or integrated)

Stateless and dedicated HVD pools are designed with N+M redundancy to provide high availability. During normal operations, all compute nodes in the pool are active, and the load distribution is performed across all of them. If a server goes down for any reason, users can be failed over to one of the remaining servers. The management cluster provides N+N redundancy.

IBM Flex System x240 Compute Nodes

Table 1 shows the building blocks of the Citrix XenDesktop on IBM Flex System solution with x240 compute nodes that are used in 500-user, 1000-user, and 5000-user deployments (up to 100 users (medium workload; 2 GB VM memory size) per node in the standard mode; up to 125 users per node in the failover mode), with a 50/50 split between stateless and dedicated HVDs. The actual number of users or virtual desktops per node depends on the user type and memory, processor, and storage requirements for those VMs.

Table 1. Building blocks of the Citrix XenDesktop on IBM Flex System solution (x240 compute nodes)
Building block
Number of elements in a building block (N+M server redundancy)*
Element type and configuration
500 users1000 users5000 users
Stateless HVD server pool3 (2+1)*5 (4+1)25 (20+5)x240 compute node
  • 2x Intel Xeon processor E5-2650 v2
  • 256 GB memory
  • 2x 200 GB SATA SSDs in a RAID-0
  • 2x 10 Gb Ethernet ports
  • 1x Embedded ESXi hypervisor
Dedicated HVD server pool3 (2+1)5 (4+1)25 (20+5)x240 compute node
  • 2x Intel Xeon processor E5-2650 v2
  • 256 GB memory
  • 2x 10 Gb Ethernet ports
  • 1x Embedded ESXi hypervisor
Management cluster2 (1+1)2 (1+1)2 (1+1)x240 compute node
  • 2x Intel Xeon processor E5-2650 v2
  • 256 GB memory
  • 2x 10 Gb Ethernet ports
  • 1x Embedded ESXi hypervisor
Management appliance111IBM Flex System Manager
Shared storage111IBM Storwize V7000 or IBM Flex System V7000 Storage Node
* For the HVD server pools and the management cluster, the value in brackets after the number of elements represents N+M server redundancy (up to M servers in the pool can fail, and the remaining N or more servers will continue to run the workload).

Figure 7 shows the components of IBM Flex System that are used in a typical 500-user reference design of the Citrix XenDesktop solution with the x240 compute nodes, with a 50/50 split between stateless and dedicated HVDs.

Citrix XenDesktop solution reference configuration with IBM Flex System x240 Compute Nodes
Figure 7. Citrix XenDesktop solution reference configuration with IBM Flex System x240 Compute Nodes

Table 2 highlights the details of the reference configuration of the Citrix XenDesktop with IBM Flex System x240 Compute Nodes solution that is shown in Figure 7.

Table 2. Reference configuration of Citrix XenDesktop with IBM Flex System x240 Compute Nodes
Diagram
reference
Description
11x Enterprise Chassis with installed infrastructure components
2x EN4093R 10Gb Scalable Switches and optical SFP+ transceivers or DAC cables (not shown in Figure 6)
2x Chassis Management Modules (not shown in Figure 6)
21x IBM Flex System V7000 Storage Node (iSCSI connectivity)
3x x240 compute nodes for stateless HVDs (N+1 server redundancy)
2x Intel Xeon processor E5-2650 v2
256 GB memory
2x 200 GB SATA SSDs
2x 10 Gb Ethernet LOM ports
1x Embedded ESXi hypervisor on a USB key
3x x240 compute nodes for dedicated HVDs (N+1 server redundancy)
2x Intel Xeon processor E5-2650 v2
256 GB memory
2x 10 Gb Ethernet LOM ports
1x Embedded ESXi hypervisor on a USB key
2x x240 compute nodes for management cluster (N+N server redundancy)
2x Intel Xeon processor E5-2680
128 GB memory
2x 10 Gb Ethernet LOM ports
1x Embedded ESXi hypervisor on a USB key
1x IBM Flex System Manager management appliance

IBM Flex System x222 Compute Nodes

Table 2 shows the building blocks of the Citrix XenDesktop on IBM Flex System solution with x222 compute nodes that are used in 450-user, 900-user, and 4500-user deployments (up to 75 users (medium workload; 2 GB VM memory size) per half-height server in the standard mode; up to 90 users per half-height server in the failover mode), with a 50/50 split between stateless and dedicated HVDs. The actual number of users or virtual desktops per node depends on the user type and memory, processor, and storage requirements for those VMs.

Table 2. Building blocks of the Citrix XenDesktop on IBM Flex System solution (x222 compute nodes)
Building block
Number of elements in a building block (N+M server redundancy)*
Element type and configuration
500 users900 users4500 users
Stateless HVD server pool2 (3+1)3 (5+1)15 (25+5)x222 compute node
  • 4x Intel Xeon processor E5-2470 (2x processors per server)
  • 384 GB memory (192 GB per server)
  • 4x 200 GB SATA SSDs (2x SSDs in a RAID-0 per server)
  • 4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
  • 2x Embedded ESXi hypervisors (1x hypervisor per server)
Dedicated HVD server pool2 (3+1)3 (5+1)15 (25+5)x222 compute node
  • 4x Intel Xeon processor E5-2470 (2x processors per server)
  • 384 GB memory (192 GB per server)
  • 4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
  • 2x Embedded ESXi hypervisors (1x hypervisor per server)
Management cluster1 (1+1)1 (1+1)1 (1+1)x222 compute node
  • 4x Intel Xeon processor E5-2470 (2x processors per server)
  • 384 GB memory (192 GB per server)
  • 4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
  • 2x Embedded ESXi hypervisors (1x hypervisor per server)
Management appliance111IBM Flex System Manager
Shared storage111IBM Storwize V7000 or IBM Flex System V7000 Storage Node
* For the HVD server pools and the management cluster, the value in brackets after the number of elements represents N+M server redundancy (up to M servers in the pool can fail, and the remaining N or more servers will continue to run the workload). Each x222 compute node consists of two servers.

Figure 8 shows the components of IBM Flex System that are used in a typical 900-user reference design of the Citrix XenDesktop solution with the x222 compute nodes, with a 50/50 split between stateless and dedicated HVDs.

Citrix XenDesktop solution reference configuration with IBM Flex System x222 Compute Nodes
Figure 8. Citrix XenDesktop solution reference configuration with IBM Flex System x222 Compute Nodes

Table 3 highlights the details of the reference configuration of the Citrix XenDesktop with IBM Flex System x222 Compute Nodes solution that is shown in Figure 8.

Table 3. Reference configuration of Citrix XenDesktop with IBM Flex System x222 Compute Nodes
Diagram
reference
Description
11x Enterprise Chassis with installed infrastructure components
2x EN4093R 10Gb Scalable Switches and optical SFP+ transceivers or DAC cables (not shown in Figure 6)
2x Chassis Management Modules (not shown in Figure 6)
21x IBM Flex System V7000 Storage Node (iSCSI connectivity)
3x x222 compute nodes for stateless HVDs (six servers with N+1 server redundancy)
4x Intel Xeon processor E5-2470 (2x processors per server)
384 GB memory (192 GB per server)
4x 200 GB SATA SSDs (2x SSDs in a RAID-0 per server)
4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
2x Embedded ESXi hypervisors (1x hypervisor per server)
3x x222 compute nodes for dedicated HVDs (six servers with N+1 server redundancy)
4x Intel Xeon processor E5-2470 (2x processors per server)
384 GB memory (192 GB per server)
4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
2x Embedded ESXi hypervisors (1x hypervisor per server)
1x x222 compute node for management cluster (two servers with N+N server redundancy)
4x Intel Xeon processor E5-2470 (2x processors per server)
384 GB memory (192 GB per server)
4x 10 Gb Ethernet ports (2x 10 GbE ports per server)
2x Embedded ESXi hypervisors (1x hypervisor per server)
1x IBM Flex System Manager management appliance


Ordering information

Table 4 shows the part numbers and quantities for ordering the Flex System chassis, storage and management components of the reference configurations shown in Table 2 and Table 3 and Figure 7 and Figure 8.

Table 4. Ordering information for the Flex System chassis, storage and management components
Diagram
reference
DescriptionPart numberQty
1Chassis with installed infrastructure components
IBM Flex System Enterprise Chassis with 2x2500W PSU, Rackable8721A1x*1
IBM Flex System Enterprise Chassis 2500W Power Module43W90494
IBM Flex System Enterprise Chassis 80mm Fan Module Pair43W90782
IBM Flex System Chassis Management Module68Y70301
IBM Flex System Fabric EN4093R 10Gb Scalable Switch95Y33092
10 GbE SFP+ transceiver or DAC cableVaries8
2Shared storage
IBM Flex System V7000 Storage NodeVaries1
Management appliance
IBM Flex System Manager Node8731A1x*1
IBM Flex System Manager Per Managed Chassis with 3 Year SW S&S90Y4222**1
* The x in the part number represents a country-specific letter. For example, the EMEA part number is 8731A1G, and the US part number is 8731A1U. Ask an IBM representative for specific details.
** Part number 90Y4222 is used for ordering the Features on Demand entitlement license in the United States, Canada, Asia Pacific, and Japan. Part number 95Y1174 is used for ordering the Features on Demand entitlement license in Latin America, Europe, Middle East and Africa.

Table 5 shows the part numbers and quantities for ordering the Flex System x240 compute node components of the reference configuration shown in Table 2 and Figure 7.

Table 5. Ordering information for the reference configuration with x240 compute nodes
Diagram
reference
DescriptionPart numberQty
Compute nodes for stateless HVDs (N+1 redundancy)
IBM Flex System x240 Compute Node (Intel Xeon processor E5-2650 v2) with integrated Virtual Fabric LOM873744x*3
Intel Xeon Processor E5-2650 v2 8C 2.6GHz 20MB Cache 1866MHz 95W00Y28553
16GB (1x16GB, 2Rx4, 1.5V) PC3-14900 CL13 ECC DDR3 1866MHz LP RDIMM00D504848
S3700 200GB SATA 2.5" MLC HS Enterprise SSD for IBM System x41Y83316
IBM Flex System x240 USB Enablement Kit49Y81193
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83823
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93103
Compute nodes for dedicated HVDs (N+1 redundancy)
IBM Flex System x240 Compute Node (Intel Xeon processor E5-2650 v2) with integrated Virtual Fabric LOM873744x*3
Intel Xeon Processor E5-2650 v2 8C 2.6GHz 20MB Cache 1866MHz 95W00Y28553
16GB (1x16GB, 2Rx4, 1.5V) PC3-14900 CL13 ECC DDR3 1866MHz LP RDIMM00D504848
IBM Flex System x240 USB Enablement Kit49Y81193
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83823
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93103
Compute nodes for management cluster
IBM Flex System x240 Compute Node (Intel Xeon processor E5-2650 v2) with integrated Virtual Fabric LOM873744x*2
Intel Xeon Processor E5-2650 v2 8C 2.6GHz 20MB Cache 1866MHz 95W00Y28552
16GB (1x16GB, 2Rx4, 1.5V) PC3-14900 CL13 ECC DDR3 1866MHz LP RDIMM00D504832
IBM Flex System x240 USB Enablement Kit49Y81192
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83822
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93102
* The x in the part number represents a country-specific letter. For example, the EMEA part number is 873744G, and the US part number is 873744U. Ask an IBM representative for specific details.

Table 6 shows the part numbers and quantities for ordering the Flex System x222 compute node components of the reference configuration shown in Table 3 and Figure 8.

Table 6. Ordering information for the reference configuration with x222 compute nodes
Diagram
reference
DescriptionPart numberQty
Compute nodes for stateless HVDs (N+1 redundancy)
IBM Flex System x222 Compute Node (Intel Xeon processor E5-2470) with integrated Virtual Fabric LOM7916N2x*3
Intel Xeon Processor E5-2470 8C 2.3GHz 20MB Cache 1600MHz 95W00D12606
16GB (1x16GB, 2Rx4, 1.5V) PC3-12800 CL11 ECC DDR3 1600MHz LP RDIMM00D496872
S3700 400GB SATA 2.5" MLC Enterprise SSD for IBM Flex System x22200AJ3206
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83826
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93106
Compute nodes for dedicated HVDs (N+1 redundancy)
IBM Flex System x222 Compute Node (Intel Xeon processor E5-2470) with integrated Virtual Fabric LOM7916N2x*3
Intel Xeon Processor E5-2470 8C 2.3GHz 20MB Cache 1600MHz 95W00D12606
16GB (1x16GB, 2Rx4, 1.5V) PC3-12800 CL11 ECC DDR3 1600MHz LP RDIMM00D496872
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83826
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93106
Compute nodes for management cluster
IBM Flex System x222 Compute Node (Intel Xeon processor E5-2470) with integrated Virtual Fabric LOM7916N2x*1
Intel Xeon Processor E5-2470 8C 2.3GHz 20MB Cache 1600MHz 95W00D12602
16GB (1x16GB, 2Rx4, 1.5V) PC3-12800 CL11 ECC DDR3 1600MHz LP RDIMM00D496824
IBM USB Memory Key for VMWare ESXi 5.1 Update 141Y83822
IBM Virtual Fabric Advanced Software Upgrade (LOM)90Y93102
* The x in the part number represents a country-specific letter. For example, the EMEA part number is 7916N2G, and the US part number is 7916N2U. Ask an IBM representative for specific details.


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30 October 2012

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