Using Host-Based Data Replication

A two-room configuration with host-based data replication is defined as follows:

• Two separate rooms

• Both rooms with one node each and disk subsystems

• Data replicated across disk subsystems in these rooms

• At least one disk subsystem, attached to both hosts, used as a quorum device, located in one of the rooms

If the room containing the quorum disk is lost, the system cannot recover automatically. Recovery requires intervention from your Sun service provider.

Figure A–1 shows a sample two-room configuration with storage arrays in each room.

Figure A–1 Example Two-Room Campus Cluster With Host-Based Data Replication (No Multipathing)

Figure 7–7 is similar to a standard noncampus configuration. The most obvious difference is that FC switches have been added to switch from multimode to single-mode fibers.