8464ch05_DisasterRecovery.fm Draft Document for Review February 7, 2020 3:15 pm 5.4 High availability and DR configurations 5.4.1 Example grid configurations Two-cluster grid DR configuration A few examples of grid configurations are described in this section.  These examples are a small subset of possible configurations, and are only provided to show  how the grid technology can be used. With up to eight cluster grids, many more ways to  configure a grid might exist. With a two-cluster grid, you can configure the grid for DR, high availability, or both.  Configuration considerations for two-cluster grids are described next. The scenarios that are  presented are typical configurations. Other configurations are possible, and might be better  suited for your environment. This section provides information that is needed to plan for a TS7700 2-cluster grid  configuration to be used specifically for DR purposes. A natural or human-caused event made the local site’s cluster unavailable. The two clusters  are in separate locations, which are separated by a distance that is dictated by your  company’s requirements for DR. The only connections between the local site and the DR site  are the grid interconnections. No host connectivity exists between the local hosts and the DR  site cluster.  Figure 5-1 shows this configuration. Production Host(s) WAN TS7700 Cluster  TS7700 Cluster  Backup DR Host DR Grid Figure 5-1 DR configuration Chapter 5. Disaster recovery  209