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Virtualized Servers and Disaster Recovery (VMware SRM)
Traditional disaster recovery plans are often very complex and difficult. The reason for this is bare metal recovery. Virtualization makes life easier for us and simplifies this environment. A virtual machine typically is stored on the host computer in a set of files, usually in a directory created by the host for that specific virtual machine. Protect these files using your backup or replication software and you've protected the entire system. These files can then be recovered to any hardware without requiring any changes because virtual machines are hardware-independent.
Reliable disaster recovery solutions traditionally require duplicating your entire production infrastructure and with it your costs. With virtualization like VMware vSphere, you can provide rapid and reliable recovery without requiring identical hardware. Virtual machines can share the physical resources of a single computer, they remain completely isolated from each other as if they were separate physical machines. If, for example, there are three virtual machines on one physical server and one of the virtual machines crashes, the other three virtual machines remain available.
Isolation is an important reason why the availability and security in a virtual environment is superior to applications running in a traditional, non- virtualized system. Server consolidation also lets you slash the cost of server infrastructure needed both for production and disaster recovery
Virtualization is a must have these days in combination with disaster recovery. Easily test your disaster recovery plan to ensure the highest levels of reliability and availability of your entire IT infrastructure. Downtime is expensive! Disaster preparedness and recovery planning is an iterative process, not a one- time event. You need to continually revisit disaster-recovery plans to ensure they remain aligned with current business goals and test those plans regularly to ensure that they perform as planned. See also this article.
VMware Site Recovery Manager provides business continuity and disaster recovery protection for virtual environments. In a Site Recovery Manager environment, there are two sites involved, a protected (primary) site and a recovery (secondary) site. Protection groups that contain protected virtual machines are configured on the protected site and these virtual machines can be recovered by executing the recovery plans on the recovery site.
VMware Site Recovery Manager change the way disaster recovery plans are designed and executed.