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What is Azure Service Bus?

  • Microsoft Azure Service Bus is a reliable information delivery service.
  • The main agenda is to make the communication easier.
  • When two or more parties want to exchange information, they need a communication facilitator.
  • Service Bus is a brokered, or third-party communication mechanism.

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Azure Service Bus: Concept

Azure service bus is a multi- tenant cloud service. multiple users share the services. The application developer who creates a namespace, then defines the communication mechanisms needed within that namespace.

azure Bus service

Azure Service Bus Fundamentals


  • Queues allows one way communication.
  • Each queue acts a broker that stores sent messages until they are
  • A single recipient receives every single message.


  • The Topics help in one-way communication
  • The Topic is similar to a broker, but they also help you to filter the received message to match the specific criteria


  • Relays provide bi-directional communication.
  • When compared to queues and topics relays don’t act like a broker.
  • Instead, it just passes them on to the destination application.

Azure Service Bus: Queues

When the user decides to connect two application is using a Service Bus queue. The process is carried out when the sender sends a message to a Service Bus Queue and a receiver picks up the message at some point of time. It is to be noted that a queue can have just a single receiver.

  • Every individual message has two parts
  • A set of properties each of which is a key and a message payload.

A receiver can read the message from a Service Bus queue in two different ways

  • Receive & delete: Receives a message from the queue and deletes it immediately
  • Peek Lock : It removes the message from the queue, it does not delete the message instead it locks the message making it invisible to other

Azure Service Bus: Relay

  • A one- way asynchronous communication is provided by both queues and topics through a broker.
  • Ina relay there the traffic flows in just one direction and there is no direct connection between senders and receivers.
  • You don’t need a broker to store a message when your application needs to both send and receive messages

Azure Service Bus:Standard vs Premium Messaging

High throughputVariable throughput
Predictable performanceVariable latency
Fixed   pricingPay as you go variable pricing
Ability to scale workload up and downN/A
Message size up to 1 MBMessage size up to 256 KB


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