Example Two-Room Configuration

A two-room configuration is defined as follows:

• Two separate rooms

• Both rooms with one node each and disk subsystems

• Data mirrored 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

In the event of loss of the room containing the quorum disk, the system will be unable to recover automatically. Recovery will require operator intervention.

Figure E-1 shows a sample two-room configuration using a partner-group of Sun StorEdge T3/T3+ disk arrays in each room.

Figure E-1 Example Two-Room Campus Cluster without a multipathing solution implemented

Figure E-1 is similar to a standard non-campus configuration; the most obvious difference is that Fibre Channel switches have been added to switch from multimode to single-mode fibers.

Although not so depicted in this chapter, campus clustering allows for configurations using multiple storage arrays. Where large storage environments are required, additional SAN switches for Sun StorEdge T3/T3+ arrays might be required.