Overview for MQWIH

The MQWIH structure describes the header information for a message sent to z/OS workload management (WLM). For any IBM MQ supported platform we can create and transmit a message that includes the MQWIH structure, but only an IBM MQ for z/OS queue manager can interact with WLM. Therefore, for the message to get to WLM from a non-z/OS queue manager, your queue manager network must include at least one z/OS queue manager through which the message can be routed.

Availability: All IBM MQ systems, plus IBM MQ clients connected to these systems.

Purpose: The MQWIH structure describes the information that must be present at the start of a message that is to be handled by the z/OS workload manager.

Format name: MQFMT_WORK_INFO_HEADER.

Character set and encoding: The fields in the MQWIH structure are in the character set and encoding given by the CodedCharSetId and Encoding fields in the header structure that precedes MQWIH, or by those fields in the MQMD structure if the MQWIH is at the start of the application message data.

The character set must be one that has single-byte characters for the characters that are valid in queue names.

Usage: If a message is to be processed by the z/OS workload manager, the message must begin with an MQWIH structure.