Cluster is said to be group of queue manager's logically

connected together to balance the load on the remote machine

(i.e if it is remote queue managers which processes your

message). And there are two types of grouping on the queue

managers. 1) Full repository 2) Partial repository. The

full repository queue manager knows all other queue

managers in the cluster and whenever a message comes to it,

and if that is unable to process the message, it will find

a queue in other queue manager in the cluster and ask it to

process the message.