Grouping

General

KubeMQ supports grouping receivers with the same subscription channel patterns to form a load balancing group.

Consumer Groups

The group pattern is a useful pattern for sharing message load handling between services and for redundancy functionality too.

During a Subscription request, the receiver can set the group name to join or not. Based on the Group value setting KubeMQ will deliver messages to the receiver as follows:

• Any receiver without a group setting (group="", blank)

• Only one receiver for each group he belongs to

Example:

In the table below we have 8 receivers which subscribe to different channels and groups:

Receiver Name	Channel	Group
R1	foo.>	""
R2	foo.>	g1
R3	foo.>	g1
R4	foo.*	g2
R5	foo.*	g2
R6	>	w1
R7	*	""
R8	foo.bar	""

In the table below, we explore several message channels and which receiver will get them:

Sending Message to Channel	Receivers
foo	R6,R7
foo.bar	R1, R2 or R3, R4 or R5, R6, R8
foo.bar.zoo	R1, R2 or R3, R6, R8