Basic System DMS PROC › SELECT Command › DSCL SELECT CRITERIA Field Name Descriptions › EXTENTS — extents in the data set (number)

EXTENTS — extents in the data set (number)

For all processing of non-VSAM data sets, and reporting on VSAM components with SCAN REALVOLS, REPORT COMPONENTS, the value of EXTENTS is set to the value of the DS1NOEPV field in the Format-1 DSCB for each data set or component.

For all other processing of VSAM clusters, the value of EXTENTS is set to the Number of Extents field NOEXTNT in the catalog entry for the first data component of each cluster. It does not include the extents in the index component of any cluster. VSAM cluster reports, however, will display the sum of the two, which thus will be larger than the number on which selection was based.

For a similar field, see MODELDSC—Is the data set a model DSCB? (yes/no).