Example

You have purchased 25 floating licenses and want to set up a redundant server configuration on three UNIX® system computers. You request permanent keys for the redundant servers using License Key Center. You install the IBM Rational® license server software on each of the three redundant server partners; servers A, B, and C. When you receive the license file of 25 permanent floating keys, you install the license file on each server.

The three servers work as a team to manage all 25 floating licenses in unison. When you have 20 license keys checked out to your users and server A crashes, servers B and C continue to manage the 25 licenses.
Important: It is a common misconception that separating redundant servers across multiple sites (for example, one in the U.S., one in Europe, and one in Asia) provides maximum fault tolerance. This is not the case. Redundant servers should always be at the same site and on the same subnet.

It is a good practice to have a homogeneous redundant server setup is (that is, all servers installed on the same operating system); however, heterogeneous environments are supported. For example, you could have two license servers installed on Solaris and one installed on HP-UX.


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