Desktop Virtualization

Definition :

                 It is a technology which enables detachment of the user state, the Operating System (OS), and the applications from endpoint devices.

Desktop Virtualization

Enables organizations to host and centrally manage desktops

• Desktops run as virtual machines within the data center and accessed over a network

Desktop virtualization benefits

• Flexibility of access due to enablement  of thin clients
• Improved data security
• Simplified data backup and PC maintenance

Need for Compute Virtualization

Need for Compute Virtualization

Before Virtualization	After Virtualization
•      Runs single operating system (OS) per machine at a time •      Couples s/w and h/w tightly •      May create conflicts when multiple applications run on the same machine •      Underutilizes resources •      Is inflexible and expensive	•      Runs multiple operating systems (OSs) per physical machine concurrently •      Makes OS and applications h/w independent •      Isolates VM from each other, hence, no conflict •      Improves resource utilization •      Offers flexible infrastructure at low cost

Compute Virtualization

Definition :

             It is a technique of masking or abstracting the physical compute hardware and enabling multiple operating systems (OSs) to run concurrently on a single or clustered physical machine(s).

•  Enables creation of multiple virtual machines (VMs), each running an OS and application
• VM is a logical entity that looks and behaves like physical machine
• Virtualization layer resides between hardware and VMs, Also known as hypervisor
• VMs are provided with standardized hardware resources

Compute Virtualization

Host (Compute)

host

•      Resource that runs applications with the help of underlying computing components

4  Example: Servers, mainframes, laptop, desktops, tablets, server clusters, etc.

•      Consists of hardware and software components

•      Hardware components

4  Include CPU, memory, and input/output (I/O) devices

•      Software components

4  Include OS, device driver, file system, volume manager, and so on

Virtualization in Information storage management

Virtualization is a technique of abstracting physical resources and making them appear as logical resources

4  For example partitioning of raw disks

Pools physical resources and provides an aggregated view of physical resource capabilities

Virtual resources can be created from pooled physical resources

4  Improves utilization of physical IT resources