Monitoring the space of user DASD groups

This topic describes the workspaces that report the status of user DASD groups space. This topic also describes the dialog boxes that you use to add, edit, and delete a user DASD volume group.

A user DASD group is a user-defined logical grouping of DASD volumes. Volumes within a user DASD group are typically related according to some criteria. You can define a user DASD group based on volume name, device address, SMS storage group, or one or more DASD volume attributes (for example, Fragmentation Index, Response Time, and other attributes).

After you define a user DASD group, you can use the User DASD Group Performance and User DASD Group Space workspaces to view aggregated performance and space metrics for the group as a whole. From these two workspaces, you can drill down to other workspaces that display performance and space metrics for each volume in the group.

You dynamically allocate user DASD volume groups. You access these workspaces through the User DASD Groups Space node in the Tivoli® Enterprise Portal.

See Workspaces for the following information:
  • Predefined workspaces and a list of all nodes that are included in the IBM Z OMEGAMON AI for Storage 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.
  • Navigating among workspaces.
  • Linking to the workspaces of other IBM® Tivoli Monitoring products.

Additionally, with OMEGAMON® for Storage on z/OS®, you can issue volume-level Storage Toolkit commands from the User DASD Group report level.

To access these commands, open the User DASD Groups Space workspace from the Navigator, right-click a row on the table view and select the Volume Actions... menu item, then select the action you want to perform.

User DASD Groups Space workspace

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

The following sections describe various components of this workspace.

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.
User DASD groups space table view

The table view contains one row of data for each user DASD group. The view contains the following information:

  • The group name
  • The number of SMS and non-SMS volumes and the total number of volumes in the group
  • The status of the VTOC index
  • The lowest freespace percent of all volumes in the group
  • The highest fragmentation index of all volumes
  • The largest free extent
  • The total free space
  • The percentage of free space for the group and the total amount of space for the entire storage group
User DASD groups with free space % < 10 bar graph
This graph contains one bar for each user DASD group with a combined free space percentage that falls below 10%.
Workspaces that are linked to this workspace
See Navigating the workspaces of the User DASD Groups Space node.

See Workspaces to learn how to navigate among workspaces and check the list of all nodes provided in IBM Z OMEGAMON AI for Storage.

Issuing Group level Toolkit commands

This section describes a sample scenario for issuing a Group level Toolkit command to schedule weekly defragmentation of volumes based on specific criteria.

With Interim Feature 3 or later, you can issue volume-level Storage Toolkit commands from the User DASD Group report level. For example, consider a user who wants to defragment all volumes with a fragmentation index greater than 700 every Monday morning.

Complete the following steps to schedule weekly defragmentation of specific volumes:
  1. Open the User DASD Groups Space workspace from the navigation tree.
  2. Add a user DASD group with the attributes Fragmentation Index, the operator > Greater than, and the value 700 and click OK.
    Note: Specify these attributes on the Attributes tab of the Add User DASD Group dialog box.
  3. Right-click the new row on the table view and select the Volume Actions...Defrag menu item.
  4. On the Schedule tab, schedule the command to run at 1:00 am, every Monday.
  5. Click OK. Volumes with a fragmentation index greater than 700 will be defragmented every Monday at 1:00 am.

Summary information for the workspaces in this node

This section lists the views and related attribute groups for the workspaces of the User DASD Groups Space node.

See Workspaces for the following information:
  • Predefined workspaces and a list of all nodes that are included in the IBM Z OMEGAMON AI for Storage 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.
  • Navigating among workspaces.
  • Linking to the workspaces of other IBM Tivoli Monitoring products.

See User DASD Groups Space workspace for more information on the primary workspace for this node.

Table 2. User DASD Groups Space workspace
View View type Attribute group
User DASD Groups Space Report TABLE Volume Group Summary
User DASD Groups with Free Space % < 10 BAR Volume Group Summary
Table 3. User DASD Group Volume Space workspace
View View type Attribute group
Volume Space Report TABLE DASD Volume Space
Volumes with Free Space % < 10 BAR DASD Volume Space
Volumes with Fragmentation Index > 650 BAR DASD Volume Space
Table 4. User DASD Group Space Trend workspace
View View type Attribute group
User DASD Groups Space Trend Report TABLE Volume Group Summary
MBs of Free Space BAR Volume Group Summary
Table 5. DFSMShsm Status workspace
View View type Attribute group
HSM Functions Status Report TABLE HSM Function Summary
Waiting Requests BAR HSM Function Summary
HSM Control Dataset Report TABLE HSM CDS
HSM Status Report TABLE HSM Status