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Let’s have a short description of what is Virtual machine? Virtual machine is completely isolated guest operating system installation inside a normal system (i.e. host). The modern virtual machines are basically implemented with either ‘hardware virtualization’ or ‘software emulation’ or most of the cases both together. Virtual machine executes programs like a physical system by implementing software of a machine. Virtual machines are divided into two main categories on the basis of degree of correspondence and their use to any real machine. A system virtual machine provide full system platform that support execution of complete operating system. Most of the times operating system is denoted by ‘OS’ but, a process virtual machine is designed in such way to run a single program, thus it means that it supports a single process. So, simply saying virtual machine is ‘isolated, efficient duplicate of a real machine’.
Virtualization is you can say the best thing to happen to the data centers in a long run. The benefits of virtualization are enormous and today most of the people are feeling so much comfortable with it. However, Backup is the unique requirement of virtualization that has brought to the market; the bigger chances will be impeded on the deployment of virtualization. Backup virtual machines create number of new data storage management issues like you can say that biggest issue of the backup virtual machine is the ‘area’. Now a days backup virtual machines are presenting some technical considerations, and the first one of them is backup virtual machines reduces the headroom because of the increased server utilization.
The second consideration is that there is bigger chance of overlap because the existing backup virtual machine runs inside the host machine. To avoid this overlap some precautionary measures are taken. If you want to get the solution for these problems then you need to run a coordinate backup virtual machine performing at hypervisor level, mostly off-host. If you want an ideal scenario then you will have to run backup virtual machine on potentially dedicated and separate hardware, so that the act of backing up a server do not impact on the live applications. Backup virtual machine has too much value now days are used all over the world in every institute along with all precautionary measures. Use the best backup method which you think can suits your virtual machine best as it will help you to save your data in case of any emergency.
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