src/qos.md

layout: default_md title: QoS title-class: page-title-activemq5 type: activemq5

QoS is a MOM abbreviation of the term Quality of Service. There are many different kinds of messaging with different qualities of service such as

topics versus queues
durable messaging versus reliable (some buffering takes place but if a consumer is down long enough the messages are discarded)
message timeout

etc.