Virtualization
- 2. Introduction Virtualization is creating a virtual version of something, including virtual computer hardware platforms, storage devices and network resources. Example: If you were to partition a basic hard drive to create two hard drives, then you would have two ‘virtualized hard drives’, technically there is a single hard drive that was digitally separated into two.
- 3. Benefits Consolidation : an approach to the efficient usage of computer resources in order to reduce the total number of resources that an organization requires. Redundancy : duplication of critical components of a system with the intention of increasing reliability of the system Migration : process by which a running virtual machine is moved from one physical host to another, with little or no disruption in service Centralized management : process of managing all the OS from one point
- 4. Types of Virtualization Hardware/Sever Virtualization Desktop Virtualization Software Virtualization Memory Virtualization Storage Virtualization Data Virtualization Network Virtualization
- 5. Hardware/Server Virtualization Hardware/Server Virtualization is the most common type of virtualization as it provides advantages of hardware utilization and application uptime. The basic idea is to combine many small physical servers into one large physical server, so that the processor can be used more effectively and efficiently. The operating system that is running on a physical server gets converted into a well-defined OS that runs on the virtual machine. The hypervisor controls the processor, memory, and other components by allowing different OS to run on the same machine without the need for a source code.
- 6. Desktop Virtualization Desktop virtualization is the concept of separating the logical desktop from the physical machine. As one can access remotely, you are able to work from any location and on any PC. Provides the work convenience and security. Provides a lot of flexibility for employees to work from home or on the go. Protects confidential data from being lost or stolen by keeping it safe on central servers.
- 7. Software Virtualization Software Virtualization provides the ability to the main computer to run and create one or more virtual environments. Used to enable a complete computer system in order to allow a guest OS to run. For instance letting Linux to run as a guest that is natively running a Microsoft Windows OS Types: Operating system-level virtualization - hosting of multiple virtualized environments within a single OS instance. Application virtualization and workspace virtualization - hosting of individual applications in an environment separated from the underlying OS. Service virtualization - emulating the behaviour of dependent (e.g., third-party, evolving, or not implemented) system components
- 8. Memory Virtualization Memory virtualization is aggregating random-access memory(RAM) resources from networked systems into a single memory pool Memory Virtualization introduces a way to decouple memory from the server to provide a shared, distributed or networked function. Enhances performance by providing greater memory capacity without any addition to the main memory. That’s why a portion of the disk drive serves as an extension of the main memory. Implementation : Application-level integration – Applications running on connected computers directly connect to the memory pool through an API or the file system. Operating System Level Integration – The operating system first connects to the memory pool, and makes that pooled memory available to applications.
- 9. Storage Virtualization Storage virtualization is the process of completely abstracting logical storage from physical storage Distributed file system, any file system that allows access to files from multiple hosts sharing via a computer network Virtual file system, an abstraction layer on top of a more concrete file system, allowing client applications to access different types of concrete file systems in a uniform way In general, there are two types of storage virtualization: Block- It works before the file system exists. It replaces controllers and takes over at the disk level. File- The server that uses the storage must have software installed on it in order to enable file-level usage.
- 10. Data Virtualization Data virtualization, the presentation of data as an abstract layer, independent of underlying database systems, structures and storage. Database virtualization, the decoupling of the database layer, which lies between the storage and application layers within the application stack over all. Without any technical details, you can easily manipulate data and know how it is formatted or where it is physically located. It decreases the data errors and workload.
- 11. Network Virtualization Network virtualization is creation of a virtualized network addressing space within or across network subnets Virtual private network (VPN) is a network protocol that replaces the actual wire or other physical media in a network with an abstract layer, allowing a network to be created over the Internet The intended result of network virtualization provides improved network productivity and efficiency. Two categories : Internal: Provide network like functionality to a single system. External: Combine many networks, or parts of networks into a virtual unit.
- 12. Conclusion Virtualization provides an easy way to set up new virtual servers so you don’t have to manage a lot of them. Keeping track of where everything – and how your physical resources are used for virtual resources – is vital, so shop for solutions that have easy-to-use tools that help you measure and monitor usage. Virtualization isn’t a magic bullet for all. But in most cases, the productivity, efficiency, security and cost advantages outweigh any issues, and thus, virtualization is continuously gaining popularity.
- 13. Thank You