# Monitoring cache CU status

This topic describes the workspaces that monitor the status of cache CU. You access these workspaces through the Cache CU Status node in the Tivoli® Enterprise Portal.

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.

## Navigating the workspaces of the Cache CU Status 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 Cache CU Status 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. Cache CU Status node: bulleted list showing the hierarchy of linked workspaces
Cache CU Status Cache CU Volume Cache Performance Dataset Performance Summary 1 Physical Volume Group Cache Dataset Performance Summary 1 Device Performance Details Cross System Volume Performance Dataset Performance Summary 1 Volume Cache Trend Cache CU Volume Performance Dataset Performance Summary 1 Physical Volume Group Performance Dataset Performance Summary 1 Volume Performance Trend Dataset Performance Summary History Device Performance Details Cross System Volume Performance Dataset Performance Summary 1 Volume Performance Trend Dataset Performance Summary History Dataset Performance Historical Detail Symmetrix Configuration Note: Obtaining EMC Symmetric data can only be done in conjunction with the applicable EMC hardware and software. The hardware required is an EMC Symmetrix at the appropriate microcode level. Also required are the EMC Symmetrix Control Facility runtime libraries available from EMC. Cache CU Raid Rank Physical Volume Group Cache Dataset Performance Summary 1 Cache CU Raid Rank Trend Cache CU Status Trend CCU Volume Cache History Dataset Historic Performance Dataset Performance Historical Detail TotalStorage Configuration TotalStorage Ranks TotalStorage Array Configuration TotalStorage Ranks Trend TotalStorage Extent Pool Volumes TotalStorage Volume Trend TotalStorage Extent Pool Trend TotalStorage Rank History TotalStorage Volume History TotalStorage CU Volumes TotalStorage Volume Trend

Footnotes for Table 1:

1. This group of workspaces is organized in the following nested pattern:
   - Dataset Performance Summary
     - Dataset Performance Detail
       - Dataset Details
       - Dataset Performance Detail Trend
     - Dataset Details
     - Dataset Performance Summary Trend
       - Dataset Performance Historical Detail

## Cache CU Status 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.
  Cache status table view
    The table view displays one row of data for each cache control unit configured to the reporting LPAR. The view contains the following information:
    - The subsystem ID of the control unit
    - The control unit type
    - The number of active volumes
    - The number of deactivated volumes
    - The cache status
    - The amount of cache configured in the control unit and the amount currently available
    - The nonvolatile storage status, the amount of NVS configured and the amount pinned
    - Storage facility series
  Available cache bar graph
    This graph contains a bar for each cache control unit. The height of the bar indicates the amount of cache (in megabytes) available in the unit.
  NVS pinned bar graph

    This graph contains a bar for each cache control unit. The height of the bar indicates the amount of NVS (nonvolatile storage, in kilobytes) pinned in the unit.

  Deactivated volumes bar graph

    This graph contains a bar for each cache control unit. The height of the bar indicates the number of deactivated volumes on that control unit.

Workspaces that are linked to this workspace
  See Navigating the workspaces of the Cache CU Status 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 Cache CU Status 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 Cache CU Status workspace for more information on the primary workspace for this node.

Cache CU Status workspace
View | View type | Attribute group
Cache Control Unit Status Report | TABLE | Cache Control Unit
Available Cache | BAR | Cache Control Unit
NVS Pinned | BAR | Cache Control Unit
Deactivated Volumes | BAR | Cache Control Unit

Cache CU Status Trend workspace
View | View type | Attribute group
Cache Control Unit Status Trend | TABLE | Cache Control Unit
NVS Pinned | PLOT | Cache Control Unit
Deactivated Volumes | PLOT | Cache Control Unit
Cache Available | PLOT | Cache Control Unit

TotalStorage® DS Configuration workspace
View | View type | Attribute group
Report | TABLE | TotalStorageDS Configuration
Report | TABLE | TotalStorageDS SSIDs
Report | TABLE | TotalStorageDS Extent Pool