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.
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.
- 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 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.
See User DASD Groups Space workspace for more information on the primary workspace for this node.
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 |
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 |
View | View type | Attribute group |
User DASD Groups Space Trend Report | TABLE | Volume Group Summary |
Megabytes of Free Space | BAR | Volume Group Summary |
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 |