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, delete, and migrate 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 general information on predefined workspaces and a list of all nodes that are included in the OMEGAMON 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.

In addition, with OMEGAMON for Storage on z/OS Version 4.2.0 Interim Feature 3 or later, 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.

Note: User groups defined within the Configuration Tool are not visible in the OMEGAMON for Storage on z/OS product unless they have been migrated. SeeMigrating user DASD group definitions for more information on how to migrate user DASD groups.

Navigating the workspaces of the User DASD Groups Space 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 User DASD Groups Space 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. User DASD Groups Space node: bulleted list showing the hierarchy of linked workspaces
User DASD Groups Space User DASD Group Volume Space Dataset Space Summary Dataset Details Device Space Details User DASD Group Space Trend User DASD Group Volume Historical Space The following workspaces display the volumes that have the least favorable readings for the attribute within the User DASD Group: Lowest User DASD Group Volumes Free Space (Top 10) Lowest User DASD Group Volumes Free Space Percent (Top 10) Highest User DASD Group Volumes Fragmentation Index (Top 10)

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.

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

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

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:

Open the User DASD Groups Space workspace from the navigation tree.
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.
Right-click the new row on the table view and select the Volume Actions...Defrag menu item.
On the Schedule tab, schedule the command to run at 1:00 am, every Monday and 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 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
Megabytes 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