Enabling large queues

IBM® MQ supports queues larger than 2 TB.

On Windows systems, support for large files is available without any additional enablement.

On AIX® and Linux® systems, you need to explicitly enable large file support before you can create queue files of multiple gigabytes or terabytes. See your operating system documentation for information on how to do this.

Some utilities, such as tar, cannot cope with files of multiple gigabytes or terabytes. Before enabling large file support, check your operating system documentation for information on restrictions on utilities you use.

For information about planning the amount of storage you need for queues, see MQ Performance documents for platform-specific performance reports.

From IBM MQ 9.1.5, you can control the size of queue files using a new attribute on local and model queues. See Modifying IBM MQ queue files for more information.