Scenario
Assume that you are establishing a single EVM Network at a site that has 12 computers on the SAN:
Computers 1, 2, and 3 are active database application servers
Computers 4, 5, and 6 are tape backup servers
Computers 7 and 8 are set up for data mining
Computers 9 and 10 are set up to test migration to a new release of the database application
Computers 11 and 12 are "extras" that are not dedicated
Setting Goals
You want to be able to include the database servers in EVM jobs so that you can use EVM's Application I/O Handler to replicate databases without taking them offline. You also want to include the tape backup servers so that you can use EVM's Backup Handler to automatically run tape backups. In addition, you would like to perform quarterly data mining on a copy of the databases. You also plan to migrate to a new version of the database application and want to test it with real data.
Analyzing Solutions
There are more than 10 computers, so not all of them can be included in one EVM Network. You are requested to set up one EVM Network now, rather than two. Later, the site will add computers and create an second EVM Network.
For now, you decide to pick computer 12 to be the EVM Server. From the other 11 computers, you must pick 9 computers to be the EVM Clients and perform the EVM Client installation on them.
In effect, the decision becomes one of determining which two computers not to include in EVM jobs. You would not perform the EVM Client installation on those two computers.