How WebSphere MQ Assures Delivery Of Messages
WebSphere MQ is basically an assured delivery mechanism consisting of queues managed by Queue Managers
. Inside the application, you have the ability to put messages onto the system and then to retrieve these messages from certain queues. The movement and interaction of the messages between different queues is facilitated by components called Channel and Transmission Queues. Now that you have a fundamental overview of the processes involved, let us look at the key points that need to be known.
WebSphere MQ Objects are Case Sensitive.
It is important to know that all objects in WebSphere MQ are case sensitive. This is an important aspect as small mistakes will cause long-term issues and ultimately result in business issues. It is also important to know that you cannot read messages from a Remote Queue. This can only be done via a local queue. Likewise, you should know that messages can only be put onto a local queue, and not a Remote Queue.
WebSphere Limits Length of Queue Names.
There are also a number of standards that need to be observed when using WebSphere MQ. For example, there is a 48-character limit in operation when it comes to queue names, processes and queue manager names. There is also a limit on channel names, with a maximum length of 20 characters allowed. However, there is no implied structure in the name, so this is a little more dynamic.
WebSphere Moves Messages between Queue Managers.
One of the key processes in WebSphere MQ is its ability to move messages between Queue Managers. This is one of the reasons why it is so popular with organizations and businesses worldwide. It allows and ensures that messages are delivered once only (eliminating unnecessary and confusing duplication). This is a fundamental in the successful operation of any business. In order to do this, there are certain things MQ requires in various scenarios, as well as the requirements for naming standards.
There are a number of MQ commands that are usually observed frequently, such as those that create, start and stop a Queue Manager, and those that issue commands to a Queue Manager. There are four different types of MQ queues (to transport messages between Queue Managers) and one related object.
The four different types of queues are: Local Queue (QL), Remote Queue (QR), Transmission Queue (TQ), and Dead Letter Queue, and the related object is a Channel (CH).
The way in which messages are moved in an important aspect of WebSphere MQ. Here is a quick overview. When an application wants to send a message to another application it opens a queue. The local queue manager decides if it is a local or remote queue. There is then a series of steps to decide where the messages go next and how it is then retrieved.
The process is highly complex but this leads to high-level performance, efficiency and accuracy all the capabilities that have made WebSphere MQ a leader in the industry. The delivery of messages, commands and queues used are very important for any system that messages across multiple platforms, and you should now have some idea of how structured and sound WebSphere MQ is.
WebSphere MQ Sometimes Needs a "Doctor."
Because it is such a complex process, WebSphere doesn't stay "healthy" automatically. Just like use, it needs a maintenance program to retain peak performance. Nastel AutoPilot, a program developed in close collaboration with IBM, is known as the WMQ doctor.
AutoPilot M6 for WebSphere MQ takes Nastel's
complex event processing engine and offers real-time monitoring and management of IBM WebSphere MQ (WMQ) environments. AutoPilot offers on-demand end-to-end application process monitoring from a single point of control 24/7/365.
From administration and configuration management, performance and availability monitoring to message tracking and capacity planning, transaction and operational monitoring, AutoPilot handles every aspect of WMQ management.
Learn more about AutoPilot M6 for WebSphere MQ (WMQ) by reading the
Nastel AutoPilot for WebSphere MQ Product Datasheet. How WebSphere MQ Assures Delivery Of Messages
By: Tom Crawford
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