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Chapter 12. Disaster Recovery, Business ... > Backup and Business Continuity

Backup and Business Continuity

The simplest approach to DR is to make a good backup of everything so that restoration is simplified when the time comes, but backups can happen in two distinctly different ways with ESX. In some cases, some of these suggestions do not make sense because the application in use can govern how things go. As an example, we were asked to look at DR backup for an application with its own built-in DR capabilities with a DR plan that the machine be reinstalled on new hardware if an issue occurred. The time to redeploy in their current environment was approximately an hour, and it took the same amount of time for a full DR backup through ESX. Because of this, the customer decided not to go with full DR backups.

Backup

What is a full DR backup? As stated previously, there are two major backup styles. The first, in terms of ESX, is referred to as a backup for individual file restoration or a backup made from within the VM. The second is a DR-level backup of the full VM disk image and configuration file. The difference is the restoration method. A standard backup, using agents running within the VM, usually follows these steps for restoration:


  

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