As I noted in an earlier blog, customers planning to move data applications (e.g., backup and archive) to the cloud must consider five key factors in selecting and migrating data. These are: Ongoing data transfer volume, expected frequency of ongoing data usage, data recall performance requirements, and application integration. In the next several blogs, I’d like to illustrate the importance of these factors by illustrating how they impact your design and planning as you migrate a few common data use cases to the cloud. The four use cases we’ll consider are: Site disaster recovery, data center off-site copy (for backup), compliance archive, remote site primary, archive and backup and ongoing management. Let’s start by looking at central site disaster recovery.