To process the index of a key-sequenced data set with GETIX and PUTIX, you must open the cluster with ACB MACRF=(CNV,...) specified. CNV provides for control interval access, which you use to gain access to the index component.

Access using GETIX and PUTIX is direct, by control interval: VSAM requires RPL OPTCD=(CNV,DIR). The search argument for GETIX is the RBA of a control interval. The increment from the RBA of one control interval to the next is control interval size for the index.

GETIX can be issued either for update or not for update. VSAM recognizes OPTCD=NUP or UPD but interprets OPTCD=NSP as NUP.

The contents of a control interval cannot be inserted through PUTIX. VSAM requires OPTCD=UPD. The contents must previously have been retrieved for update through GETIX.

RPL OPTCD=MVE or LOC can be specified for GETIX, but only OPTCD=MVE is valid for PUTIX. If you retrieve with OPTCD=LOC, you must change OPTCD to MVE to store. With OPTCD=MVE, AREALEN must be at least index control interval size.

Beyond these restrictions, access to an index through GETIX and PUTIX follows the rules found in Processing Control Intervals.