Z/OSMF RMF Unable to connect the troubleshooting process for DDS failure

RMF is a tool for system resource consumption and performance monitoring. A total of three monitors, respectively, are responsible for different types of monitoring. This blog is about monitor III, which is mainly responsible for short-term system data acquisition, data collection for problem determination, job delay analysis and system goal realization. Z/OSMF RMF is web-based access to Z/OS RMF can be said to be a modern version of z/Os RMF, providing all the features supported by z/OS RMF Monitor III, simplifying operations, providing intelligent data analysis, and reporting capabilities. DDS is a data collector, each z/Os Sysplex requires only one Gpmserve address space to run DDS, providing a data source for the RMF client. Each open platform requires a GPM4CIM address space to run DDS. This article describes how to troubleshoot when a DDS connection error or cannot be authenticated.

With Z/OSMF RMF You can easily manage multiple systems by specifying a valid system name, host name or IP address, port number, and system type in system status. Z/OSMF supports z/OS, AIX, Zlinux, Xlinux. At the same time, the system status can be viewed through the performance Index state. After the system status definition is monitored, the connection status is indicated in the Connectivity column. There are three kinds of state connected, error and unauthorized. As shown in Figure 1:

Figure 1

When the error occurs, first check that the host name or IP address port number is incorrect. If correct, further check whether DDS start normally. You can quickly authenticate by directly accessing the URL address of the RMF DDS Portal, using the browser input http://hostname:port, and accessing the z/OS RMF DDS Portal interface as shown in Figure 2:

Figure 2

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