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CLWLRANK queue attribute

 

This queue attribute specifies the rank of the queue for the purposes of cluster workload distribution. This parameter is valid only for local, remote, and alias queues. The value must be in the range zero through 9 where zero is the lowest rank and 9 is the highest.

Use this attribute if you want more specific control over the final destination for messages sent to be a queue manager in another cluster. Do this by setting the rank of the 'gateway' queue managers at the intersection of the clusters. When you do this, messages take a specified route through the interconnected clusters towards a preferred destination. For example, if messages arrive at a 'gateway' queue manager that can send them to either of two queue managers ranked 1 and 2, they are automatically sent to the queue manager with the highest rank, in this case the queue manager ranked 2. WebSphere MQ obtains the rank of queue managers before checking channel status. This means that even non-accessible queue managers are available for selection, and allows messages to be routed through the network. If you used the priority attribute WebSphere MQ would have to select between one of two possible destinations. If a channel is not available to the destination indicated by the rank, the message does not get sent to the next destination in the rank order, instead the message is held on the xmit queue until, a channel becomes available.

 

Parent topic:

Queue attributes for workload balancing

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