Choosing between RoundRobin and WeightedActive distribution

If weighted active connections are configured with default proportions for each target, connections are evenly distributed across all target servers; the goal is to have an equal number of active connections on each server. This is similar to the round-robin distribution method; the difference is that round-robin distribution distributes connections evenly to all target servers without consideration for the active number of connections on each server.

In certain scenarios, a round-robin distribution might be appropriate for specific server applications. Select this type of distribution for particular targets by specifying the DISTM ROUNDROBIN parameter on the VIPADISTRIBUTE statement.

Although both round-robin and weighted active connection distribution do not consider WLM recommendations in their target selection, weighted active connection distribution does use the server-specific abnormal completion information, the general health indicator, and the TSR value to reduce the weight when these values are less than optimal. For round-robin distribution, connections are not distributed to a target if its TSR value is 0. Periodically, the distributor sends a new connection request to a target with a TSR of 0 to check whether the responsiveness of that target has improved.