41 Disk Load Balancing Window

Use the Disk Load Balancing window to move a disk load from one disk to one or more other disks within the same class. Disk load balancing is accomplished by changing the sizes of columns in a bar graph, where the columns represent disk utilization for a particular class and disk.

You can also enter disk metrics directly into a Disk Load Entry Form for system sizing and other purposes. The graph and table work together so that, after running the model, changes made in the graph are seen in the table, and vice versa.

See Also Performing Tasks in the Disk Load Balancing Window

41.1 Performing Tasks in the Disk Load Balancing Window

The tasks you can perform in the Disk Load Balancing window include:

41.1.1 Balancing the Disk Load

To balance the disk load across selected disks:

  1. From the View menu, select Graph.

  2. From the Options menu select Graph Data, and choose the type of graph data to view. You can choose any of the following:

  3. From the Nodes area of the window, select Global Scope or an individual node for balancing.

  4. From the Workloads area of the window, select the workload classes for balancing.

  5. Select the disks for balancing from the Disk/Util % area of the window. Double click on Disk or Util % to sort alphabetically by disk or numerically by utilization.

  6. Click on the Update View push button to update the graph.

  7. To balance the disk load equally across all selected disks, choose Balance View from the Operations menu.

  8. To custom balance the disk load, using the mouse point to the column in the bar graph for the disk and class you want to change. Press MB1 and drag the column up or down to increase or decrease the load for that disk and class, and to distribute to other disks.

  9. Run the model, saving the changes, or click Apply on the File menu to apply changes before running the model.

See Also Entering Disk Metrics

41.1.2 Entering Disk Metrics

From the Operations menu, select Data Entry. The Disk Load Entry Form replaces the disk load balancing bar graph.

  1. From the View menu, choose Table.

  2. From the Options menu select Table Data, and choose the type of table data to view. You can choose any of the following:

  3. From the Nodes area of the window, Select an individual node for data entry.

  4. From the Workloads area of the window, select the workload classes for data entry.

  5. Select the disks for data entry from the Disk/Util % area of the window. Double click on Disk or Util % to sort alphabetically by disk or numerically by utilization.

  6. Click on the Update View push button to update the entry form.

  7. Using the mouse, select a cell from the table and enter a new value. Press TAB to commit the data.

Changes to the disk metrics are made directly, but the disk utilization graph does not correspond to these changes until you run the model. After changing data, Close the Disk Load Balancing window and run the model before viewing the graphs again.

See Also Balancing the Disk Load

41.2 File Menu

Use the File menu in the Disk Load Balancing window to access these menu items:

41.2.1 Save Menu Item

Use the Save menu item to save the Disk Load table in a .CSV or .SLK file.

41.2.2 Print... Menu Item

Use the Print menu item to send the disk load graph to a printer or file.

See Also Print Graph Dialog Box

41.2.3 Apply Menu Item

Use the Apply menu item to apply the disk load changes without closing the window.

41.2.4 Cancel Menu Item

Use the Cancel menu item to cancel any disk load changes and exit the window.

41.2.5 Close Menu Item

Use the Close menu item to apply the disk load changes and exit the window.

41.3 View Menu

Use the View menu to access these menu items:

41.3.1 Graph Menu Item

Use the Graph menu item to display the disk load balancing graph.

41.3.2 Table Menu Item

Use the Table menu item to display the disk load balancing table.

41.4 Operations Menu

Use the Operations menu to access these menu items:

41.4.1 Update View Menu Item

Use the Update View menu item to update the graph or table after selecting nodes, workloads, and disk utilizations.

41.4.2 Balance View Menu Item

Use the Balance View menu item to balance the load equally across all selected disks.

41.5 Options Menu

Use the Options menu to access these menu items:

41.5.1 Table Data Menu Item and Table Options Buttons

Use the Table Data menu item and Table Options buttons to select the disk metric for display in the disk load entry form. You can select from:

41.5.2 Graph Data Menu Item and Graph Options Buttons

Use the Graph Data menu item and Graph Options buttons to select the disk metric for display in the disk load graph. You can select from:

41.5.3 Log Messages Menu Item

Use the Log Messages toggle button to display load changes in the Session Messages window. When Log Messages is enabled, messages are displayed.

41.6 Nodes Field

Use the Nodes field to select one or more nodes whose data will be displayed in the Disk Load Balancing window. To select more than one node, press Ctrl and click MB1 on each node. Or click and drag MB1 to select a number of consecutive nodes.

The nodes listed in the field and used for the global view are those in your configuration. If you change the view after you have already distributed the disk load, the changed values will be lost.

41.7 Workloads Field

Use the Workloads field to select one or more workloads for display in the Disk Load Balancing window. To select more than one workload, press Ctrl and click MB1 on each workload. Or click and drag MB1 to select a number of consecutive workloads.

41.8 Disk Utilizations Field

Use the Disk Utilizations field to select one or more disks for display.

Select the disks for balancing or data entry from the Disk/Util % area of the window. Double click on Disk or Util % to sort alphabetically by disk or numerically by utilization.

41.9 Update View Push Button

Use the Update View push button to update the graph or form after selecting nodes, classes, or disks.


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