Virtualization
Virtualization is
the creation of a virtual rather than actual version of something, such as an operating system,
a server,
a storage device or network resources.
You probably know a little about virtualization
if you have ever divided your hard drive into
different partitions. A partition is
the logical division of a hard disk drive to create, in effect, two separate
hard drives.
Virtualization began in the 1960, as a method of logically dividing the
system resources provided by mainframe computers between different applications. Since then, the meaning of the term has
broadened.
These solutions scale from a few virtual
machines
that host a handful of
Web sites, virtual
desktops
or intranet
services
all the way up to tens of
thousands of virtual machines serving millions of Internet users. If you don't
know all the virtualization software names on this list, it's time for an
introduction.
VMware
Find a major data center anywhere in the world that doesn't use VMware,
and then pat yourself on the back because you've found one of the few. VMware
dominates the server virtualization market. Its domination doesn't stop with
its commercial product, VMware vSphere also called "ESXi".VMware also dominates the
desktop-level virtualization market and perhaps even the free server
virtualization market with its VMware
Server formerly called
"GSX Server" product. VMware remains in the dominant spot due to
its innovations, strategic partnerships and rock-solid products.
Microsoft
Microsoft came up with the only non-Linux
hypervisor, Hyper-V; to compete in a tight
server virtualization market that VMware currently dominates. Not easily
outdone in the data center space, Microsoft offers attractive licensing for its
Hyper-V product and the operating systems that live on it.
Microsoft Hyper-V, formerly known as Windows Server
Virtualization, is a native hypervisor; it can create virtual machines on x86-64 systems
running Windows.Starting with Windows 8, Hyper-V supersedes Windows Virtual
PC as the hardware virtualization component
of the client editions of Windows
NT. A server computer running Hyper-V can be configured to
expose individual virtual machines to one or more networks.
Hyper-V was
first released alongside Windows
Server 2008, and has been available without charge for all the Windows Server and some client operating systems
since.
Citrix
Citrix Systems, Inc. is an American multinational software company that provides
server, application and desktop
virtualization, networking, software
as a service (SaaS),
and cloud
computing technologies.
Red Hat
Red Hat Virtualization (RHV) is an enterprise virtualization product produced by Red
Hat, based on the KVM hypervisor. Red Hat Virtualization
uses the SPICE protocol and VDSM (Virtual Desktop Server
Manager) with a RHEL-based centralized
management server. It can acquire user and group information from an Active
Directory service or FreeIPA Active Directory
emulator. Before version
4.0 products was named Red Hat Enterprise Virtualization (RHEV) Certified by
KVM community.
Oracle
If Oracle's world domination of the enterprise database
server market doesn't impress
you, its acquisition of Sun Microsystems
has
made it an impressive virtualization player. Additionally,
Oracle owns an operating system (Sun Solaris), multiple
virtualization software solutions (Solaris Zones,
LDoms and xVM) and server hardware
(SPARC).
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