
626 DS8800 Performance Monitoring and Tuning
Figure 18-22 Example three-site configuration with z/OS Metro/Global Mirror
In the example that is shown in Figure 18-22, the System z environment in the Local Site is
normally accessing the DS8000 disk in the Local Site. These disks are mirrored back to the
Intermediate Site with Metro Mirror to another DS8000. At the same time, the Local Site disk
has z/OS Global Mirror pairs established to the Remote Site to another DS8000, which can
be at continental distances from the Local Site.
18.7.3 z/OS Metro/Global Mirror performance
Apply the performance considerations described in this chapter under Metro ...