What is command queue in MQ?

What is command queue in MQ?

COMMAND. QUEUE , is a local queue to which suitably authorized applications can send MQSC commands for processing. These commands are then retrieved by an IBM WebSphere MQ component called the command server.

How do I check my MQ status?

Use the MQSC command DISPLAY CHSTATUS to display the status of one or more channels. Use the MQSC command DISPLAY CHSTATUS (MQTT) to display the status of one or more IBM WebSphere MQ Telemetry channels. Use the MQSC command DISPLAY CLUSQMGR to display information about cluster channels for queue managers in a cluster.

How do I view messages in WebSphere queue?

Browsing the messages on a queue

  1. In the Navigator view, click the Queues folder that contains the queue. In the Navigator view, click the Queues folder that contains the queue.
  2. In the Content view, right-click the queue, then click Browse Messages… The Message Browser dialog opens.

How do you stop QM in MQ?

On Windows and Linux, to stop the queue manager by using IBM MQ Explorer, complete the following steps:

  1. Open the IBM MQ Explorer.
  2. Select the queue manager from the Navigator View.
  3. Click Stop. The End Queue Manager panel is displayed.
  4. Select Controlled, or Immediate.
  5. Click OK. The queue manager stops.

How do I start a channel in MQ?

Use the MQSC command START CHANNEL, specifying the channel name, to start the channel as a process or a thread, depending on the MCATYPE parameter. (If channels are started as threads, they are threads of a channel initiator.) Use the control command runmqchl to start the channel as a process.

What is Ipprocs and Opprocs in MQ?

IPPROCS – will tell you how many threads are pulling(reading) the msgs from that queue. OPPROCS – will tell you how many threads are writing the msgs onto that queue.

How do I stop a queue manager?

There are three ways to stop a queue manager: a quiesced shutdown, and immediate shutdown, and a preemptive shutdown. Use the endmqm command to stop a queue manager. Note: You must use the endmqm command from the installation associated with the queue manager that you are working with.

How do I send a message to MQ?

When you have completed this tutorial, you should have a basic understanding of how to set up and use IBM MQ messaging using a remote queue definition.

  1. Creating the queue manager on the sending machine.
  2. Creating the queues on the sending queue manager.
  3. Creating a message channel.
  4. Putting a test message on the queue.

How do you restart MQ?

Open the IBM WebSphere MQ Explorer. Select the queue manager from the Navigator View. Click Start. The queue manager restarts.

How do I stop MQ channels?

Use the MQSC command STOP CHANNEL to request the channel to stop activity. The channel does not start a new batch of messages until the operator starts the channel again. For information about restarting stopped channels, see Restarting stopped channels.

How do I start a sender channel?

Starting the sender channel

  1. On the command-line, type: runmqsc QM1. After a confirmation message, the tool is ready to accept commands.
  2. Start the sender channel on the source queue manager. In the MQSC interface, type: START CHANNEL(TO.QM2)
  3. Check that the channel is running. In the MQSC interface, type:

What is Qtime in MQ?

QTIME. Interval, in microseconds, between messages being put on the queue and then being destructively read. The maximum displayable value is 999999999; if the interval exceeds this value, 999999999 is displayed.

How do I delete a single message in MQ queue?

In MQEdit you can browse a list of messages on a queue, then from that list, select an individual message (or multiple messages if you need to). Then press the Delete button, or select Delete from the right-mouse button context menu.

How do I use IBM WebSphere MQ Explorer?

Procedure

  1. Create a queue manager: Open IBM WebSphere MQ Explorer.
  2. Create a local queue: Expand the queue manager you have just created and right-click queues.
  3. Define the server-connection channel: Right-click Channels.
  4. Run the listener. The listener is automatically started when the queue manager is configured.

How do I send a message to my queue?

Sending messages to a queue (console)

  1. In the navigation pane, choose Queues.
  2. On the Queues page, choose a queue.
  3. Choose Send and receive messages.
  4. In the Message body, enter the message text.
  5. For a First-In-First-Out (FIFO) queue, enter a Message group ID.

What is a message queue and where is it used?

Message queues are used within operating systems or applications as a way for programs to communicate with one another. They may also be used to pass messages between computer systems. A message queuing environment provides programs in a set, and performs well-defined, self-contained actions in response to a particular request.

How to monitor an existing queue from WebSphere MQ?

Queue Managers. Queue Managers can accept,process,and deliver messages across a variety of different platforms spanning global networks.

  • Queues. There are many queues associated with each Queue Manager.
  • Cluster Queue Managers.
  • Channels.
  • Listeners.
  • Service Objects.
  • Events.

    • How to create queue manager in WebSphere MQ?

    Log into the WebSphere MQ server as mqm user.

  • Set up WebSphere MQ environment source/opt/mqm/bin/setmqenv -s.
  • Creating a new queue manager named “QM1” crtmqm QM1.
  • Start QM1 strmqm QM1.
  • Run MQSC command on QM1 runmqsc QM1.
  • Create a local queue Q1 define qlocal (Q1).
  • Create a listener define listener (L1) trptype (tcp) port (1416).

    • Why to use a message queue?

    As understood,once the message is received by a process it would be no longer available for any other process.

  • If we want to communicate with small message formats.
  • Shared memory data need to be protected with synchronization when multiple processes communicating at the same time.