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

ALLOCATEvvAttempts to overwrite the record format characteristic of F, U, or V withanother value from that set causes a system error.RECFM(A) and RECFM(M) are compatible with PDSEs.RECFM and RECORG are mutually exclusive.RECORG(ES|KS|LS|RR)Determines the organization of the records in a new VSAM data set. Tooverride the record organization defined in the data class (DATACLAS) of thedata set, use RECORG.You can assign:ESKSLSRRFor a VSAM entry-sequenced data setFor a VSAM key-sequenced data setFor a VSAM linear space data set. You cannot access linear data setswith VSAM record level sharing (RLS).For a VSAM relative record data setIf you do not use RECORG, SMS assumes a non-VSAM data set.RECORG and RECFM are mutually exclusive. To define the data setorganization for a non-VSAM data set, see DSORG.Exception: You can use the RECORG parameter to allocate both SMS-managedand non-SMS-managed data sets. If SMS is not active, however, thesystem checks the syntax and ignores the RECORG parameter.REFDD(file-name)This is the file name of an existing data set whose attributes are copied to anew data set. The system copies these attributes to the new data set:v Data set organization:– Record organization (RECORG)– Record format (RECFM)v Record length (LRECL)v Key length (KEYLEN)vvKey offset (KEYOFF)Space allocation– AVGREC– SPACEThe system does not copy the retention period (RETPD) or expiration date(EXPDT) to the new data set.LIKE and REFDD are mutually exclusive.Exception: You can use the REFDD parameter to allocate both SMS-managed andnon-SMS-managed data sets. If SMS is not active, however, the systemchecks the syntax and then ignores the REFDD parameter.RELEASETo delete unused space when the data set is closed.If you use RELEASE for a new data set with the BLOCK or BLKSIZEparameter, then you must also use the SPACE parameter.REUSEFrees and reallocates the file name if it is currently in use.44 z/OS V1R6.0 DFSMS Access Method Services for Catalogs