Current Technology And Future Trends Computer Science Essay

Current Technology And Future Trends Computer Science Essay emcee virtualization is the masking of host resources including the number and identity of individual physical bonifaces, processors, and operating systems from server users. The intention is to spare the user from having to understand and manage complicated details of server resources speckle increasing resource sharing and utilization and maintaining the capacity to expand later.Virtualization allows multiple operating system instances to run concurrently on a single electronic computer it is a means of separating hardware from a single operating system. Each guest OS is managed by a Virtual Machine Monitor (VMM), overly kn feature as a hypervisor which is computer software/hardware platform virtualization software that allows multiple operating systems to run on a host computer concurrently.Because the virtualization system sits between the guest and the hardware, it gage control the guests use of CPU, memory, and storage, even allowing a guest OS to migrate from one machine to another.Virtualization is a special solution between centralized and decentralized deployments. Instead of purchasing and maintaining an entire computer for one application, each application can be given its own operating system, and all those operating systems can reside on a single piece of hardware. This provides the benefits of decentralization, like security and stability, while making the just about of a machines resources.Advantages of VirtualizationZero downtime maintenanceFreedom from vendor-imposed upgrade cyclesInstant provisioningPooling hardware resourceVirtual hardware supports legacy operating systems efficientlyDynamic resource sharingSecurity and fault isolationBusiness continuity, backups, and automated restorationExamples of Productivity Using VirtualizationWhen to use Virtualization As virtualization disentangles the operating system from the hardware, a number of genuinely useful new tools beco me available. Virtualization allows an operator to control a guest operating systems use of CPU, memory, storage, and other resources, so each guest receives only the resources that it needs. This dispersion eliminates the danger of a single runaway process consuming all available memory or CPU. It also helps IT staff to satisfy service direct requirements for specific applications. Since the guest is not bound to the hardware, it also becomes possible to dynamically move an operating system from one physical machine to another. As a particular guest OS begins to consume more resources during a peak period, operators can move the offending guest to another server with less demand. This patient of of flexibility changes traditional notions of server provisioning and capacity planning. With virtualized deployments, it is possible to treat computing resources like CPU, memory, and storage as a hangar of resources and applications can easily move to receive the resources they need a t that time.Components of Virtual InfrastructureBare-metal hypervisors to enable full virtualization of each x86 computer. Virtual infrastructure services such as resource focal point and consolidated backup to optimize available resources among virtual machinesAutomation solutions that provide special capabilities to optimize a particular IT process such as provisioning or disaster recovery.Physical to Virtual Server Migration Any respectable virtualization solution depart offer some kind of P2V (Physical to Virtual) migration tool. The P2V tool will take an existent physical server and make a virtual hard drive image of that server with the necessary modifications to the driver stack so that the server will boot up and run as a virtual server. The benefit of this is that you dont need to rebuild your servers and manually reconfigure them as a virtual serveryou just now suck them in with the entire server configuration intact So if you have a data center full of aging servers ru nning on sub-GHz servers, these are the perfect candidates for P2V migration. You dont even need to worry about license acquisition costs because the licenses are already paid for. You could literally take a live with 128 sub-GHz legacy servers and put them into eight 1U dual-socket quad-core servers with dual-Gigabit Ethernet and two independent iSCSI storage arrays all connected via a Gigabit Ethernet switch. The annual hardware maintenance costs unaccompanied on the old server hardware would be enough to pay for all of the new hardware Just imagine how clean your server room would look after such a migration. It would all fit inside of one rack and give you lots of room to grow. As an added bonus of virtualization, you father a disaster recovery plan because the virtualized images can be used to instantly recover all your servers. Ask yourself what would happen now if your legacy server died. Do you even remember how to rebuild and reconfigure all of your servers from scratch? (Im guessing youre cringing right about now.) With virtualization, you can recover that Active Directory and Exchange Server in less than an hour by rebuilding the virtual server from the P2V image. Software Automation Solutions for VirtualizationThese are the few platform virtualization and software providers in the market place on which organizations rely upon. VMWare RightScale eNomaly Force.com Gigaspaces Citrix Xen Microsoft Virtualization Sun VirtualBox IBM PowerVM Hewlett-Packard Integrity Virtual Machines (Integrity VM).Future Trends in field of VirtualizationVirtualization has significant cost benefits for organizations server consolidation can yield a saving of 2 million over three years for an organization running 250 dual-core servers and a power saving in the order of 78,000 per 1,000 PCs per year can be realized by moving from a full desktop PCs infrastructure to a server-hosted desktop virtualization solution.The market for virtualization management solutions will be the most innovative and, potentially, lucrative in the near future.Financial analysts estimate the market for IT virtualization could be worth over $19 billion.As many as 16 million desktops could be virtualized by 2011.The virtualization infrastructure management (VIM) market is undoubtedly going to be the most lucrative aspect of IT virtualization in the longer term, and so is perhaps the most dynamic and active part of the virtualization sceneReferencesEmerging trends and the evolving vendor landscape By Victoria FurnessIntroduction to server virtualization by George Ouwww.microsoft.com