Recommended for Active/Standby or Active/Active configurations that specify the data file directory location during queue manager creation (crtmqm -md DataPath) to be something other than the default of /var/mqm/qmgrs. This feature is available in WebSphere MQ Version 7.0.1 starting with fix pack 6. This WebSphere MQ feature allows multiple installations of MQ on a single server (e.g. WebSphere MQ 7.5 with MQ 8.0). Support for multi-instance MQ is available starting with version 9.1 of the Recovery Kit. With this configuration, the mgs.ini file must be synchronized between the nodes in the cluster. Each Queue Manager data directory and its associated log directory reside on a shared LUN (one LUN for the data and one LUN for the log or both directories reside on the same LUN) based on the Queue Manager DataPath directive information found in the mgs.ini file. It is similar to Configuration 2 with the difference being that the direct mounts for Configuration 4 do not reside under /var/mqm.
Figure 6 – File System Layout 4 – Multi-Instance Queue Managers