What is MQ Clustering?
What is MQ Clustering?
Clusters simplify the administration of IBM WebSphere MQ networks which usually require many object definitions for channels, transmit queues, and remote queues to be configured. Clusters can be used to distribute the workload of message traffic across queues and queue managers in the cluster.
What is queue clustering?
A cluster queue is a queue that is hosted by a cluster queue manager and made available to other queue managers in the cluster. When a queue is advertised, any queue manager in the cluster can put messages to it. To put a message, the queue manager must find out, from the full repositories, where the queue is hosted.
What is DQM in MQ?
Distributed queue management (DQM) is used to define and control communication between queue managers. Enables you to define and control communication channels between queue managers.
What is namelist in MQ?
A namelist is an IBM® MQ object that contains a list of cluster names, queue names or authentication information object names. In a cluster, it can be used to identify a list of clusters for which the queue manager holds the repositories. A namelist is an IBM MQ object that contains a list of other IBM MQ objects.
How do you connect to MQ clusters?
In the Navigator view (in the Queue Manager Clusters folder), right-click the queue manager, the click Connect to queue manager. WebSphere MQ Explorer connects to the remote cluster queue manager using the full repository queue manager that is WebSphere MQ Explorer’s information source about the cluster.
How do you make a cluster in MQ?
Procedure
- Decide on the organization of the cluster and its name.
- Decide which queue managers are to hold full repositories.
- Alter the queue manager definitions to add repository definitions.
- Alter the queue manager definitions to create separate cluster transmission queues for each destination.
- Define the listeners.
How do I create a cluster queue in MQ?
What is a namelist?
The NAMELIST statement defines a group of variables or arrays. It specifies a group name, and lists the variables and arrays of that group.
What is the minimum number of full repositories required in an MQ cluster?
You should always have at least 2 Full Repositories in the cluster so that in the event of a failure of a Full Repository, the cluster can still operate.
What is cluster receiver channel?
A cluster-receiver channel definition defines the end of a channel on which a cluster queue manager can receive messages from other queue managers in the cluster. A cluster-receiver channel can also carry information about the cluster-information destined for the local repository.
What are the advantages of MQ clustering over distributed queuing?
You can continue to manually configure distributed queuing as well as, or instead of, using clusters. Clustering provides two key benefits: Clusters simplify the administration of IBM MQ networks, which usually require many object definitions for channels, transmit queues, and remote queues to be configured.
What is clustering in WebSphere MQ?
Clustering provides two key benefits: Clusters simplify the administration of IBM WebSphere MQ networks which usually require many object definitions for channels, transmit queues, and remote queues to be configured. This situation is especially true in large, potentially changing, networks where many queue managers need to be interconnected.
How does mqput work in a cluster?
• Consider a client using the black queue that is available in the cluster on three server queue managers. A message is MQPUT by the client and is delivered to *one* of the servers. It is processed there and a response message sent to a ReplyToQueue on the client queue manager.
What is a clustered queue cluster?
Clusters provide a mechanism for interconnecting queue managers in a way that simplifies the initial configuration required to set up the system and the ongoing management required. The larger the configuration, the greater the benefit.
What is required for a successful cluster setup?
A successful cluster setup is dependent on good planning and a thorough understanding of IBM WebSphere MQ fundamentals, such as good application management and network design. Ensure that you are familiar with the information in Concepts of intercommunication and How clusters work . What are clusters and why are they used?
