V mware

VM ware

What is VM ware?•VMware Workstation is a hypervisor that runs

on x64 computers; it enables users to set up multiple virtual machines (VMs) and use them simultaneously along with the actual machine. Each virtual machine can execute its own operating system, such as Microsoft Windows, Linux or BSD variants. As such, VMware Workstation allows one physical machine to run multiple operating systems simultaneously

HISTORY• In 1998 VMware was barely having 20 employees

and operating in stealth mode, In February 1999, at the DEMO Conference the company was launched officially by Chris Shipley, Within couple of months passing in May 1998, VMware launched its first product VMware Workstation, and in 2001 they entered into server market with VMware GSX Server (hosted) and VMware ESX Server (hostless), Later company gained good economy and in 2003 they launched VMware Virtual Center, Virtual SMP technology and VMotion.

HISTORY

•In 2004 VMware was acquired by EMC Corporation for $625 million, In 2005, they established two R&D Center one in Cambridge, Massachusetts and other in Time Warner Center in New York City.

HISTORY

•In an initial public offering EMC Corporation released 10% of the company’s shares in VMware on the New York Stock Exchange in August 2007.

HISTORY• On July 8, 2008, Co-founder, president and CEO

Diane Greene was fired by the Board of directors from VMware, and elected Paul Maritiz, He had retired from Microsoft who was heading EMC’s Cloud computing business unit.

• Later On September 16, 2008, VMware announced that they are collaborating with Cisco to provide data center solutions. Couple of months later on November 26, 2008 VMware acquired Tungsten Graphics, which was core expertise in 3D Graphics driver development.

HISTORY

•Around 2 years VMware started to collaborate and it acquired couple of companies, On January 12, 2010, it acquired Zimbra, it’s an open-source collaboration tool from Yahoo. On May 6, 2010, it acquired GemStone, to be operated under Spring Source VMware division.

HISTORY• On August 31st, 2010, VMware announced its

intention to acquire TriCipher and Integrien.• On 26 April 2011, VMware acquired SlideRocket a

startup which developed a SaaS application for building business presentations that are stored online. Through a Web-based interface, users can handle all parts of the process, from designing slides and compiling content, to reviewing documents and publishing and delivering them

• On May 16, 2011 VMware announced its intent to acquire Shavlik Technologies. VMware already used Shavlik technology in its vCenter Update Manager product, and co-developed the VMware Go offering.

•On 31 May 2011, VMware acquired Socialcast, a group workstream service.

•On 13 June 2011, VMware acquired Digital Fuel, IT Financial and Business Management SaaS Company.

•On 24 April 2012, VMware acquired Cetas Software.

•On 22 May 2012, VMware acquired Wanova.•On 2 July 2012, VMware acquired DynamicOps.•On 23rd July 2012, VMware acquired Nicira Inc.

What is a Virtual Machine?

•A virtual machine (VM) is a simulation of a machine (abstract or real) that is usually different from the target machine (where it is being simulated on). Virtual machines may be based on specifications of a hypothetical computer or emulate the computer architecture and functions of a real world computer.

•In short, it lets you use an OS within your OS.

•It splits the physical resources of your computer and divides them, whether equal or not, between this two OS which you can run at the same time which is usually impossible.

Virtual machine advantages:•multiple OS environments can co-exist on the

same computer, in strong isolation from each other

• the virtual machine can provide an instruction set architecture (ISA) that is somewhat different from that of the real machine

•application provisioning, maintenance, high availability and disaster recovery.

Disadvantages of VMs are:• a virtual machine is less efficient than a real

machine when it accesses the hardware indirectly

• when multiple VMs are concurrently running on the same physical host, each VM may exhibit a varying and unstable performance (Speed of Execution, and not results), which highly depends on the workload imposed on the system by other VMs, unless proper techniques are used for temporal isolation among virtual machines.

Why use a Virtual Machine?

•You’re already running a computer with an OS, so why do you need to use a virtual machine to run another computer INSIDE of your computer?

No OS is perfect nor the same.•Linux and Windows are major examples of

different OS which works in entirely different ways.

•As programmers, being able to test a software on different environments are crucial, not to mention that running applications which can usually cause harm to the main computer may be done in the confines of a virtual machine without the risk of losing important files.