1.1.2 Server Virtualization The server virtualization method is a process that includes partitioning physical servers into a number of small virtual servers using virtualization software. With server virtualization, each virtual server runs many operating system instances at the same time. 1.1.2.1 Primary Advantage of Server Virtualization Reducing the number of servers Partitioning and isolation, remains the qualities of server virtualization, by permitting simple and safe server consolidation. Through uniting, the number of physical server, it can be significantly reduced. This one is bringing the advantages of decreased power consumption, floor space, and air conditioning costs. It is necessary to note that it does not change even though the number of physical servers is brought down, to …show more content…
manage the number of virtual servers. Therefore, when vitalizing servers, operation management tools installation is recommended for well-organized server management. Reducing TCO Server consolidation with virtualization diminishes expenses of equipment, support, power, and air conditioning. It lowers the Total Cost of Ownership (TCO) in addition by expanding the operational changes and productivity of server assets along with virtualization-specific features. As a result of today’s enriched server CPU performance, a few servers have high resource-usage rates but most are often underutilized. Virtualization can decrease such ineffective use of CPU resources, plus it can optimize resources throughout the server environment. The operational management costs can be reduced in a great way because servers managed by each business division's staff can be centrally managed by a single administrator. To improve the availability and business continuity One important feature of virtualized servers which is not seen in physical server environments remains live migration. With live relocation, virtual servers can be moved to another physical server for tasks such as performing maintenance of the physical servers without shutting them down. Thus, there is no effect on the end user. Another great advantage of virtualization innovation is that its embodiment and hardware-independence features enhance availability and business stability. Increase efficiency for development and test environments Servers are often utilized inefficiently in system development sites.
At this point the quantity of servers can be easily increased if distinctive physical servers are used by each business division's development team. Reconfiguring development and the test environments can consume time when physical servers are shared by teams. Using server virtualization to concurrently run various operating system environments on one physical server these issues can be resolved, which enables concurrent improvement by performing analysis of multiple environments. In addition to that, when development and test environments can be encapsulated and saved, the process of reconfiguration will become simple. Virtualization of servers gives some security benefits. Running a server inside a hypervisor can restrict the effect of security breach, but server virtualization does not prevent attackers from trading off the server through vulnerabilities in the server application, the guest operating systems, or the host operating system. When different servers on the same host are virtualized, all can be affected by a single
security.
Reconfigured and programmed servers for deployment and transfer to new locations from the company’s data center
...common risks and their mitigating techniques are: Unauthorized access to data centers, computer rooms, and wiring closets – this risk can be mitigated by applying policies, standards, procedures, and guidelines for staff and visitors to secure facilities. Servers must sometimes be shut down to perform maintenance – this can be mitigated by creating a system to tie servers, storage devices, and the network together and created redundancy to prevent down time on mission critical services. Server operating systems vulnerability – this can be mitigated by ensuring all server operating system environments are defined with the proper patches and updates. And lastly cloud computing virtual environments are not secure by default configurations – can be mitigated with setting up virtual firewalls and server segments on separate VLANs to help prevent failure in the network.
This will allow PVM to reduce network usage and improve server performance and data share between servers. One benefit of having multiple servers is if one server breaks down, other server are able to handle the data therefore important information will not be lost. Furthermore staffs are able to access information easier and fast. This will mean it is easy to locate and track information which is needed. One drawback is in the short term is can be very expensive to run multiple servers .Another drawback of having multiple servers at Pvms is it will require skill professional IT staff to run the server therefore staff will need to be retrain to use the new servers which may take time and have high training cost. Lastly a drawback for Pvms is viruses can spread to other servers within
Virtualizing your server lets you run different Operating Systems, such as Windows and Linux, in different virtual servers on the same physical server. Once you have one virtual server configured, you can use that same configuration to set up new virtual servers, which takes just a few minutes. Compared to the hours it takes to configure a new physical server, server virtualization is far more efficient (Marshall, 2011).
Virtual machines operate based on the computer architecture and functions of a real or hypothetical computer, and their implementations may involve specialized hardware, software, or a combination of both.
This approach is significantly better than the traditional way, in which a company buys rackmount servers, and networking equipment, as virtual hardware can be repurposed and reused, unlike physical hardware, where new servers have to be bought when the app needs to be scaled to handle a higher load. This approach can also be used to have multiple low end machines work together to get the processing power and storage of a high end computer for a much lower price. Networking, in particular, costs much less money as everything is virtual and there is no physical networking hardware, and OpenStack creates a mesh-like network.
For that hardware virtualisation is more beneficial to handle all servers together and provide data from data centre of server to user virtual desktop.
The exponential growth into more than a dozen buildings across Dallas, Denver, Atlanta and Houston within 10 years meant Granite Properties had hastily bolted together its server system, adding new, and replacing damaged, equipment as needed. To meet the demands of its 130 widespread employees, Granite was employing 30 aging physical servers, each running from its own box.
Hardware, software, support and maintenance costs grow each year with multiple systems in each local region running different types of software and hardware. The application and hardware support teams are larger than could be possible with one integrated solution.
Virtualization technologies provide isolation of operating systems from hardware. This separation enables hardware resource sharing. With virtualization, a system pretends to be two or more of the same system [23]. Most modern operating systems contain a simplified system of virtualization. Each running process is able to act as if it is the only thing running. The CPUs and memory are virtualized. If a process tries to consume all of the CPU, a modern operating system will pre-empt it and allow others their fair share. Similarly, a running process typically has its own virtual address space that the operating system maps to physical memory to give the process the illusion that it is the only user of RAM.
... all of your different hosts and handle the conversion and routing of data between the servers and their virtual disks.
The fundamental idea behind a virtual machine is to remove the hardware of a single computer and make it a self-contained operating environment that behaves as it is a separate computer. Essentially, the virtual machine is software that executes an application and isolates it from the actual operating system and hardware. CPU scheduling and virtual-memory techniques are used so that an operating system can create the illusion that a process has its own processor with its own (virtual) memory. The virtual machine provides the ability to share the same hardware yet run several different operating systems concurrently, as shown in Figure 2-11.
This case study is an analysis of the Chicago Tribunes Server consolidation in which the Chicago Tribune moved its critical applications from several mainframes and older Sun servers to new, dual-site data-center infrastructure based on Sun 15K servers. The Tribune clustered the Sun servers over a 2-mile distance, lighting up a dark-fiber, 1-Gbps link between two data centers. This configuration let the newspaper spread the processing load between the servers while improving redundancy and options for disaster recovery. (Baltzan and Philips, 2009 p 162)
4. increase speed with low cost bring out new solutions and services using speed method on cloud based shared development operations.
Today’s servers are designed to last for longer periods; however, the idea of keeping up with new data center demands, requires constant hardware upgrade. The main reasons for undertaking server upgrade include; need to extend the server’s life, need to get the most out of the existing servers, the need to make use of the old data center hardware and implications of virtualization. Server virtualization is a critically networking function because it makes one server act as many servers; each with unique applications and Operatin...