End of April a longer article was published on IBM developerWorks describing Workload balancing, automatic client reroute, client affinities concepts and administration for the DB2 pureScale feature. The mentioned technologies are key to setting up a shared disk DB2 cluster for a 24x7 availability. So if you want to learn about server lists, member priorities, connection timeouts, and other related concept, this is a good place to start reading.
It is important to note that right now the article is based on DB2 10.1. The new release DB2 10.5 adds so-called member subsetting to the above concepts, so that an application can be configured to use a subgroup of available machines.