HP Insight Cluster Management Utility Multiple windows broadcast, Single window pdsh, Dshbak

6.11 Multiple windows broadcast

This task is available when one or more nodes are selected. The following connections are available for multiple windows broadcast:

•A secure shell connection through the network, when the network is up on selected nodes.

•Connection through the management card, if selected nodes have a management card.

The multiple windows broadcast command launches a master console window and concurrent mirrored secure shell sessions embedded in an x term on all selected nodes. All input entered on the master console window is broadcast to the secure shell sessions an selected nodes. This enables the system administrator to issue the same command on several nodes by entering it only once. To issue commands to a specific node, enter the input directly in the desired x term for that node.

To improve the x term window display appearance, every window can be shifted in x and y from the previous one to fit on the screen. By default, the shift values are computed so the windows tile the screen and no window appears outside of the screen.

If you do not need to visualize the secure shell sessions, or do not want to overcrowd the display, you can start with the x term windows minimized.

Figure 50 Multiple windows broadcast command

NOTE: The console broadcast displays x term windows, but is limited by the number of TTYs and the display capacity of the X server. HP recommends limiting the multiple window command to 64 nodes at the same time.

6.12 Single window pdsh

The single window pdsh command uses a single terminal to execute commands on several nodes in parallel, at one time. The output of pdsh can be piped to a filter which formats the output from all the selected nodes in a synthetic form that omits repetitions of identical results. You can choose between two filtering options:

•cmudiff (default)

•dshbak

94 Managing a cluster with HP Insight CMU