# Monitoring channel paths

This topic describes the workspaces that monitor the status of channel paths. You access these workspaces through the Channel Path node in the Tivoli® Enterprise Portal.

## Navigating the workspaces of the Channel Path node

This section summarizes the workspace links that are available through the Navigator node. Depending on your monitoring goal, you follow a specific series of links to get detailed information about storage resources.

You start in the Channel Path node to navigate to the workspaces that you see in Table 1. You can access the workspaces in this table using the standard path and method for navigating workspaces.

Table 1. Channel Path node: bulleted list showing the hierarchy of workspace links
Channel Path Channel Volume Performance (restricted to channels with hard disk drives attached) Dataset Performance Summary Dataset Performance Detail Dataset Details Dataset Performance Detail Trend Dataset Details Dataset Performance Summary Trend Dataset Performance Historical Detail Device Performance Details Cross System Volume Performance Volume Performance Trend Dataset Historic Performance Summary Dataset Performance Historical Detail Channel Volume Cache (restricted to channels with hard disk drives attached) Dataset Performance Summary (as above) Device Performance Details Cross System Volume Performance Volume Cache Trend Channel Path Trend Channel Path Historical Volume Performance Dataset Historic Performance Summary Dataset Performance Historical Detail Channel Path Historical Volume Cache Performance Dataset Historic Performance Summary Dataset Performance Historical Detail The following workspaces display the volumes that have the least favorable readings for the attribute within the SSID selected for navigation: Highest Channel Volumes Response Time (Top 10) Highest Channel Volumes MPL (Top 10) Highest Channel Volumes I/O Rate (Top 10) Highest Channel Volumes Busy Percent (Top 10) Lowest Channel Volumes Connect Percent (Top 10)

## Channel Path workspace

This topic describes the main components of the principal workspace for this node.

The direct situation analysis feature is available for this workspace. The feature can help you analyze and understand a problem that is displayed in this workspace. See Directly monitoring situations.

Views
  This workspace provides the following views. For a description of the attributes used as column headings in the workspace table view, review the attribute group definitions for this workspace in the online help. The help resource includes attribute descriptions that are displayed when you hover with the mouse pointer over a column heading.
  Channel path table view
    The table view displays one row of data for each channel path. The view contains the following information:
    - The channel path ID
    - Its status
    - Whether or not it is a shared path
    - Utilization percentage across the complex
    - Utilization percentage within this LPAR
    - The type of connection it is
    - Whether or not it is DCM managed
    - The BUS utilization percentage
    - Various read and write metrics for both the complex and the reporting LPAR
    - The number of SMS volumes, NON-SMS volumes and the total number of volumes configured in the LPAR
    - The channel path management facility group number for the path
  Complex % utilization bar graph
    This graph contains a bar for each channel path that had any utilization since the start of the RMF™ interval. The height of the bar indicates the percent to which the path was utilized in the complex.
  LPAR % utilization DASD bar graph
    This graph contains a bar for each channel path for which there are any volumes configured in the reporting LPAR and for which there was any utilization within the reporting LPAR since the beginning of the RMF interval.
  LPAR MB/Sec WRITE - DASD bar graph
    This graph contains a bar for each channel path for which there are any volumes configured in the reporting LPAR and for which there were any write operations that were performed to DASD in the reporting LPAR since the beginning of the RMF interval.
  LPAR MB/Sec READ - DASD bar graph
    This graph contains a bar for each channel path for which there are any volumes configured in the reporting LPAR and for which there were any read operations to DASD that were performed in the reporting LPAR since the beginning of the RMF interval.
Workspaces that are linked to this workspace
  See Navigating the workspaces of the Channel Path node.

  Learn how to navigate to workspaces here: Accessing workspaces. Also see Integration with other products.

  See Workspaces for a list of all nodes provided in Tivoli OMEGAMON XE for Storage on z/OS.

## Summary information for the workspaces in this node

This section lists the views and related attribute groups for the workspaces of the Channel Path node.

See Workspaces for general information on predefined workspaces and a list of all nodes that are included in the Tivoli OMEGAMON XE for Storage on z/OS product. Each node corresponds to a specific area of storage resource monitoring. And each node includes links to a unique set of storage resource workspaces. See Accessing workspaces to learn about navigating among workspaces. And see Integration with other products to learn about linking to the workspaces of other IBM Tivoli Monitoring products.

See Channel Path workspace for more information on the primary workspace for this node.

Channel Path workspace
View | View type | Attribute group
Complex % Utilization | BAR | Channel Path
LPAR % Utilization - DASD | BAR | Channel Path
LPAR MB/Sec Written - DASD | BAR | Channel Path
LPAR MB/Sec Read - DASD | BAR | Channel Path
Channel Path Report | TABLE | Channel Path

Channel Volume Performance workspace
View | View type | Attribute group
Volume Response Time > 25 | BAR | DASD Volume Performance
Volume Performance Report | TABLE | DASD Volume Performance

Channel Volume Cache workspace
View | View type | Attribute group
Volume Cache Report | TABLE | Cache Devices
Read Hit Percent < 55 | BAR | Cache Devices
Write Hit Percent < 30 | BAR | Cache Devices

Channel Path Trend workspace
View | View type | Attribute group
Channel Utilization | PLOT | Channel Path
Channel Path Trend | TABLE | Channel Path

Channel Volume Response Time workspace
View | View type | Attribute group
Volume Performance Report | TABLE | DASD Volume Performance
Volume Response Time > 25 | BAR | DASD Volume Performance