Extraction, Split User Exits, and Split File Time Processing › Setting up for Split File Time Processing › Preallocate a Duplicate Index File (Recommended)

Preallocate a Duplicate Index File (Recommended)

If the split file index is to be used by other applications, we recommend that the INDEXDUP operand be used on the SPLIT statement. The duplicate index file should be a sequential file with the same file attributes as the main split file index. We recommend that you allocate room for up to 10 additional index entries (each is 192 bytes). Once the file is created, it should be allocated with DISP=SHR. Update serialization is provided by CA SMF Director through the use of ENQ processing and must be honored by applications that use the duplicate index. For more details on serializing the duplicate index, see the User Guide.