Virtulization ppt
- 2. 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. • Eg: 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.
- 3. • Virtualization makes servers, workstations, storage and other systems independent of the physical hardware layer • The technology behind virtualization is known as a virtual machine monitor (VMM) or virtual manager, which separates compute environments from the actual physical infrastructure.
- 4. • Host Operating System: – The operating system actually running on the hardware itself. • Guest Operating System: – The operating system running in the simulated environment likeVMware,virtualbox,ect. Types of Operating System
- 6. Hypervisor • Software called the hypervisor is installed on the physical hardware in a virtualized datacenter, and acts as a platform for virtual machines. • The hypervisor allows virtual machines to operate with a degree of independence from the underlying physical hardware.
- 9. Examples
- 10. Para-virtualization Full-virtualization OS level-virtualization Virtualization Techniques
- 11. Para-virtualization • The para-virtualization approach is a little different. Unlike the full virtualization technique, the guest servers in a para- virtualization system are aware of one another. A para-virtualization hypervisor doesn't need as much processing power to manage the guest operating system
- 12. Full virtualization • Full virtualization uses a special kind of software called a hypervisor. The hypervisor interacts directly with the physical server's CPU and disk space. It serves as a platform for the virtual servers' operating systems.
- 13. OS level-virtualization • An OS-level virtualization approach doesn't use a hypervisor at all. Instead, the virtualization capability is part of the host OS, which performs all the functions of a fully virtualized hypervisor.
- 14. Server virtualization Desktop virtualization Network virtualization Storage virtualization Types of Virtualization
- 15. Server virtualization • Server virtualization is the partitioning of a physical server into smaller virtual servers to help maximize your server resources. In server virtualization the resources of the server itself are hidden, or masked, from users, and software is used to divide the physical server into multiple virtual environments, called virtual or private servers. This is in contrast to dedicating one server to a single application or task.
- 16. • One common usage of this technology is in Web servers. Using virtual Web servers is a popular way to provide low- cost Web hosting services. Instead of requiring a separate computer for each Web server, dozens of virtual servers can co-reside on the same computer. • Server virtualization has many benefits. For example, it lets each virtual server run its own operating system and each virtual server can also be independently rebooted of one another. Server virtualization also reduces costs because less hardware is required so that alone saves a business money.
- 17. Desktop virtualization • Desktop virtualization, often called client virtualization, is a virtualization technology used to separate a computer desktop environment from the physical computer. Desktop virtualization is considered a type of client-server computing model because the "virtualized" desktop is stored on a centralized, or remote server and not the physical machine being virtualized. • Desktop virtualization provides a way for users to maintain their individual desktops on a single, central server. The users may be connected to the central server through a LAN, WAN or over the Internet. • Desktop virtualization has many benefits, including a lower total cost of ownership (TCO), increased security, reduced energy costs, reduced downtime and centralized management.
- 18. Network virtualization • It is a method of combining the available resources in a network by splitting up the available bandwidth into channels, each of which is independent from the others, and each of which can be assigned to a particular server or device in real time. • The idea is that virtualization disguises the true complexity of the network by separating it into manageable parts, much like your partitioned hard drive makes it easier to manage your files.
- 20. Storage virtualization • It is the pooling of physical storage from multiple network storage devices into what appears to be a single storage device that is managed from a central console. Storage virtualization is commonly used in storage area networks (SANs).
- 21. Why Virtualization • Provides secure, isolated virtual boxes for running untrusted applications. • Provides emulation of hardware, or hardware configuration that you do not have. • Virtualization can also be used to simulate networks of independent computers. • Virtual machines can be used to run multiple operating systems simultaneously.
- 22. virtualization Benefits • Sharing of resources helps cost reduction • Isolation: Virtual machines are isolated from each other as if they are physically separated • Hardware Independence: Virtual machines run independently of underlying hardware • Portability: Virtual machines can be migrated between different hosts.
- 23. Virtual Box • Portability Virtual Box runs on a large number of 32-bit and 64-bit host operating systems. • Great hardware support. • No hardware virtualization required.
- 24. • Guest Additions After installing the Guest Additions, a virtual machine will support automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. Hence, improving the performance of the guest OS and providing additional integration and communication with the host system.
- 25. Thank you!