Working with large filters

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

To set preferences for working with large filters, see Setting preferences for MVS™ Files subsystems.

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

Note: The examples use a smaller filter for purposes of illustration.

To reduce excessive CPU consumption on the z/OS® host, the z/OS system administrator can limit the number of results that MVS data set filters can return. If this limit is reached, a warning message IZEA0100W The number of returned data sets exceeds <limit>. is displayed, where the <limit> is the number of results specified by the z/OS system administrator. The "Locate" function cannot locate data sets or members that fall beyond the limit of filter search results. Modify your MVS data set filters to reduce the number of results they produce so that the limit is not triggered.

Displaying more data sets

When you first expand a large filter, the data sets in excess of 50 are shown by using placeholders.

To show more data sets, double-click the placeholder.
The next 50 data sets are displayed and a placeholder is shown for the previous 50 data sets.
To continue to browse up and down through the data sets, double-click either the top or the bottom placeholder.
You can also browse through data sets by doing the following actions:
- Select a filter name and then select Navigate > Top, Navigate > Bottom, Navigate > Previous, Navigate > Next from the menu.
- Select a filter name, data set name, or placeholder and then press the keyboard shortcuts Ctrl+Home (top), Ctrl+End (bottom), Ctrl+PgUp (previous), or Ctrl+PgDn (next).

Locating a data set

To use the Locate command, you must set the Sort Order for Data Sets option on the MVS Files Preference page to By name. Otherwise, the sort order is changed to By name temporarily until the filter is refreshed.

To locate a specific data set, do these steps.

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

The data set name is displayed and highlighted.

Changing the number of data sets to display

To change the numbers of data sets to display for a filter, do one of the following actions:

Select a placeholder and then select Show More or Show Less from the menu. A window opens prompting you to specify the number of data sets to display.
Select a filter name and then select Properties from the menu. On the Properties page, select Expansion and specify the number of data sets 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.