z/OS V1R6.0 DFSMS Access Method Services for Catalogs

LISTCAT OutputREC-TOTAL—The total number of records actually in the data or indexcomponent. This statistic is not maintained when the data set is processed incontrol interval mode. For a variable-length RRDS, this is the count of slots in thedata set.REC-UPDATED—The number of records that have been retrieved for update andrewritten. This value does not reflect those records that were deleted, but a recordthat is updated and then deleted is counted in the update statistics. Statistics forrecords updated are not maintained when the data set is processed in controlinterval mode.SPLITS-CA—Control area splits. Half the data records in a control area werewritten into a new control area and then were deleted from the old control area.SPLITS-CI—Control interval splits. Half the data records in a control interval werewritten into a new control interval and then were deleted from the old controlinterval.SYSTEM-TIMESTAMP—The time (system time-of-day clock value) the data orindex component was last closed (after being opened for operations that mighthave changed its contents).USER-DATA-SIZE—Displays the total length of data before compression. If thedata lengths are too large to be presented in decimal, they are presented inhexadecimal format.VLS: Volumes GroupThe fields in this group identify the volume on which a data component, indexcomponent, user catalog, or non-VSAM data set is stored. It also identifiescandidate volumes for a data or index component. The fields describe the type ofvolume and give, for a data or index component, information about the space theobject uses on the volume.vvvIf an entry-sequenced or relative record cluster’s data component has more thanone VOLUMES group, each group describes the extents that contain data recordsfor the cluster on a specific volume.If a key-sequenced cluster’s data component has more than one VOLUMESgroup, each group describes the extents that contain data records for the cluster,or one of its key ranges, on a specific volume.If a key-sequenced cluster’s index component has more than one VOLUMESgroup, each group describes the extents that contain index records for thecluster, or one of its key ranges, on a specific volume. The first VOLUMES groupdescribes the extent that contains the high-level index records (that is, indexrecords in levels above the sequence set level). Each of the next groups describesthe extents that contain sequence-set index records for the cluster, or one of itskey ranges, on a specific volume. The index component of a key-sequenced dataset with the IMBED attribute will have a minimum of two volume groups, onefor the embedded sequence set, and one for the high-level index. The extents forthe embedded sequence set are the same as those for the data component.BYTES/TRACK—The number of bytes that VSAM can write on a track (listed forpage spaces only).DEVTYPE—The type of device to which the volume belongs.374 z/OS V1R6.0 DFSMS Access Method Services for Catalogs