Working with large partitioned data sets

To improve performance for large partitioned data sets, you can limit the number of members that are displayed in the Remote Systems view.

Before you begin

To set preferences for working with large partitioned data sets, see Setting preferences for MVS Files subsystems.

About this task

When the default settings for the MVS™ Files subsystem are in effect and a partitioned data set is expanded, the Remote Systems view displays a maximum of 50 partitioned data set members. You can take the following actions to browse through the members of a large partitioned data set.

Note: The examples use a smaller partitioned data set for purposes of illustration.

Displaying more members

About this task

When you first expand a large partitioned data set, the members in excess of 50 are shown by using placeholders.

Procedure

To show more members, double-click the placeholder. The next 50 members are displayed, and a placeholder is shown for the previous 50 members.
To continue to browse up and down through the members, double-click either the top or the bottom placeholders. You can also browse through members by selecting a member name or placeholder and then pressing the keyboard shortcuts Ctrl+Home (top), Ctrl+End (bottom), Ctrl+PgUp (previous), or Ctrl+PgDn (next).

Locating a member

About this task

Locate a member that you want to locate. ²

Procedure

To locate a specific member name, do these steps:

Select the partitioned data set name, and then select Locate from the menu or press keyboard shortcut Ctrl+L.
In the Locate Member window, specify the member name that you want to locate and click OK. You can specify a partial member name, such as MEM. If the name you search for does not exist, the member name just before the search string is located. Previous searches are preserved and added to a list in the Locate Member window. You can select a previous search string from this list. The member name is displayed and highlighted.

Changing the number of members to display

Procedure

To change the numbers of members to display for a partitioned data set, do one of the following actions:

Select a place holder and then select Show More or Show Less from the menu. A window opens prompting you to specify the number of members to display.
Select a partitioned data set name and then select Properties from the menu. On the Properties page, select Expansion and specify the number of members to display in the Expansion page size field.

¹ For IDz users, the MVS Files subsystem Properties view also displays the following information:

Property Group Name: The name of the property group that is associated with the subsystem.
Property Group Overrides: Whether any values in the property group were overridden: Yes or No.

² For IDz users, the Locate menu item is also available on the z/OS Projects view.