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Hudson Bay

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Hudson’s Bay Company and IBM: Virtual Blade
Platform Case Study

Three types of sever virtualization Visualization uses special software called “hypervisor” which creates a layer and abstracts and interacts with the physical resources and reallocates them more efficiently. It serves as a platform for the virtual servers’ operating systems. The hypervisor keeps each virtual server independent and unaware of the other running servers. It monitors the physical server’s resources and relays its resources to the right virtual server. Due to their own processing need, physical servers need to reserve some power and resources to run the hypervisors’ application. That fact has an overall impact on the performance and speed of applications. Para-Virtualization: Unlike the normal virtualization process, the guest servers are now aware of one another. A hypervisor in a para-virtualization system doesn’t need that much power to get along with the additional guest operating systems. The whole system works as a coherent unit. OS- Virtualization: The OS approach is completely different with regard to the first ones. The OS-virtualization doesn’t use a hypervisor at all. The host OS performs all the functions of a virtualized hypervisor. The only condition is that all guest servers must possess the same OS. Each virtual server is independent from all the others but a mixture between the OS is not possible because all have to be homogenous. Importance of virtualization for Hudson’s Bay Company The blades they use allow them to work faster because of their speed. They decided to use the blades because they needed more power due to the growing environment of the business and they could combine the many servers they used into the blades. The management of the IBM helps them to predict problems before they occur, wherefore they can prevent failures. All the capabilities that were promised with this system were fulfilled. It was easy to learn how to work with the new technology. SAN saves all the information so if one blade-server is down, they can just exchange it with the new one without copying anything to save it. You can even access the system from home so that you do not have to come in if there is an issue. For HBC it is important to be “up all the time” and IBM assures them success and fulfills all their needs as a big company. The blades combine all the servers, offer more power and ease the usage. Companies expected to use Storage Area Network All big companies which have massive information in – and – out flow should use a SAN because it gives them the possibility to protect all the information of the business and the customers in case that a server is down or through an error something gets lost. SAN saves a big amount of data so you do not have to copy it to be safe. It also reduces storage costs, increases flexibility and manages information. The SAN is able to communicate between any server and the data saved as well as between different saved data on the network. As the cost and complexity of SANs have dropped in the early 2000s to levels that allow a wider adoption, small to medium sized business environments are now also capable of using SAN. Risks of virtualization Virtualization provides less security as all security software’s only protect operating systems, hardware and workloads but not the newly used hypervisor. Moreover, workloads from different security levels are combined together. When virtualized they will be more mobile and it is difficult to secure data from high security levels. Also, as there are many different ways do administrate the hypervisor layer it is very difficult to control this. Virtualization as green technology Virtualization reduces energy cost and is therefore cheaper. As virtualization tries to use every free space possible it is reducing the space taken up by data and as well reducing electrical power usage and emissions.

References:
What is server virtualization [Motion picture]. (2007).

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