1. Hypervisor
Also called virtual machine manager (VMM), is one of many hardware
virtualization techniques allowing multiple operating systems, termed guests, to
run concurrently on a host computer. It is so named because it is conceptually
one level higher than a supervisory program. The hypervisor presents to the
guest operating systems a virtual operating platform and manages the execution
of the guest operating systems. Multiple instances of a variety of operating
systems may share the virtualized hardware resources. Hypervisors are very
commonly installed on server hardware, with the function of running guest
operating systems, that themselves act as servers.
Citrix-XenDesktop
Use any hypervisor - XenServer, vSphere, or Hyper-V
Deliver a high-definition user experience over any device or network.
Citrix XenDesktop is a desktop virtualization solution that transforms Windows
desktops and applications into an on-demand service available to any user,
anywhere, on any device. With XenDesktop, you can securely deliver individual
Windows, web and SaaS applications, or full virtual desktops, to PCs, Macs,
tablets, smartphones, laptops and thin clients—all with a high-definition user
experience.
What is desktop virtualization?
Desktop virtualization is a set of mainstream technologies that optimize the
delivery of desktops, applications and data to users. The operating system, apps
and data are decoupled from the underlying PC hardware and moved to the
datacenter, where they can be centrally managed and secured. Instead of juggling
thousands of static desktop images, IT can manage and update the OS and apps
once, from one location, then deliver desktops and apps that are customized to
meet the performance, security and mobility requirements of each individual
user.
Citrix-XenServer
XenServer allows IT administrators to flexibly assign up to 16 x86 servers into
a single Resource Pool of server resources. Multiple Pools can be managed from a
single XenCenter management console. A Resource Pool is a tightly coupled
collection of servers whose resources are virtualized to host a set of Virtual
Machines. Servers in a Resource Pool monitor the configuration state and
availability of their peers.
VMware-vSphere
VMware vSphere (Cloud consolidate Datacenters)
Designed for organizations that want to virtualize
their entire datacenters and deliver IT as a service,
VMware® vSphere® Enterprise and Enterprise Plus
editions include the full range of vSphere features for
transforming datacenters into dramatically simplified
cloud computing environments that can deliver the
next generation of flexible, reliable IT services.
Microsoft-Hyper-V (codenamed Viridian)
Hyper-V exists in two variants: as a stand-alone product called Microsoft Hyper-
V Server 2008 (Hyper-V Server 2008 R2 for the second release), and as an
installable role in Windows Server 2008 R2 and Windows Server 2008. Hyper-V is a
role in Windows Server® 2008 and Windows Server® 2008 R2 that provides you with
the tools and services you can use to create a virtualized server computing
environment. This type of environment is useful because you can create and
manage virtual machines, which allow you to run multiple operating systems on
one physical computer and isolate the operating systems from each other.
Provisioning Services (PVS) - Component of XenDesktop
Citrix Provisioning Services enables you to stream a single desktop image to
create multiple virtual desktops on one or more servers in a data center. This
facility greatly reduces the amount of storage required compared to other
2. methods of creating virtual desktops.
Provisioning Services (PVS) or Machine Creation Services (MCS)?— Both options
work and both options provide single image management.
Citrix-XenClient
Citrix XenClient extends the flexibility and security of desktop virtualization
to mobile users and lets them run multiple virtual desktops on a single
corporate laptop.
Switch between local and Virtualy Secured VM's.
Workers can use their virtual desktops wherever their work takes them, with no
network connection needed.
Web Interface (WI)
Users access their Appsresources through a standard Web browser.
Independent Computing Architecture (ICA)
With Citrix ICA Web Client, application traffic is transported across a wide
area network (WAN) A Citrix ICA Web Client makes information techonology (IT)
management much easier. Instead of maintaining personal computers at local
branch offices--Citrix ICA Web Client enables a corporate IT department to house
and maintain virtual, personal computers in a central location for users who are
located in various geographic regions.
One disadvantage of Citrix ICA Web Client is that multiple users sharing the
required WAN link can decrease its performance.
SSL Access Gateway
Extend access to datacenter resourcesconfiguration securly from outside the
office while maintaining control through comprehensive SmartAccess policies.
A user may have full access (read, save locally, print, etc.) to a set of files
when utilizing her office PC-—but may be restricted to read-only access in less
secure remote access scenarios such as connecting through an unrecognized kiosk
device.
With SmartAccess, administrators have the ultimate flexibility to develop and
implement corporate policies that enforce data and application security.
Citrix NetScaler
Build enterprise cloud networks and availability for all applications.
A NetScaler is usually deployed in front of a server farm and functions as a
transparent TCP proxy between clients and servers, without requiring any client
side configuration. This basic mode of operation is called Request Switching
technology and is the core of NetScaler functionality. Request Switching enables
a NetScaler to multiplex and offload the TCP connections, maintain persistent
connections
