GDS provides mirroring function and consistent manageability for disk units managed by GDS by virtualizing disk units as logical volumes. In this chapter, GDS object structure is explained so that you can understand the premise of logical volume management.
As GDS Snapshot, optional software of GDS, is implemented, proxy volumes and shadow volumes become available. By using proxy volumes and shadow volumes, the backup operation that can be conducted during service without affecting the running service can be realized.
Installing GDS I/O Monitor Option, optional software of GDS, enables the setting of I/O Response Time Assurance Function for GDS class.
This chapter systematically describes the virtual object structure that is the underlying basis of GDS, GDS Snapshot and GDS I/O Monitor Option functionality to make it clear.
