Allocating Temporary Files

To specify the allocation of your temporary files, issue the following command

DYNAM SET TEMP[ALLOC] {MVS|HIPER}

where:

MVS

Allocates temporary files to MVS data sets.

HIPER

Allocates temporary files to hiperspace.

For z/OS, temporary metadata files can be allocated using a similar procedure to allocating permanent metadata files:

• If DYNAM allocation for HOLDMAST or HOLDACC is present, temporary files are stored in the designated PDSs.
• If DYNAM SET TEMP[ALLOC] MVS is issued, in the default temporary PDSs.
• If DYNAM SET TEMP[ALLOC] HIPER is issued, in the HIPERSPACE.

To alter the default allocation parameters for temporary files for MVS data sets, issue the following command

DYNAM SET TEMP[ALLOC] FOR type dynam_parms

where:

type

Is one of the following: HOLDACC, HOLDMAST, HOLD SAVE, REBUILD, FOCUS, FOCSORT, OFFLINE, or FOC$HOLD.

dynam_parms

Are regular DYNAM ALLOC parameters to be used as default for that type. Note that DCB parameters, if provided here, will be ignored, since they must be compatible with the file type being written.

This is similar to the functionality of IBITABLA. The defaults should be overwritten for all cases when, in older versions, a private copy of IBITABLA existed containing different values.

System defaults for HOLDMAST and HOLDACC are:

TRKS 5  5 DSORG PO DIR 36 NEW REU

System defaults for all other types are:

CYLS 5 10 DSORG PS NEW REU

FOCUS supports synonym names up to 64 characters. However, PDS member names cannot exceed eight characters. FOCUS accounts for this operating environment limitation with the command DYNAM SET LONGSYNM.

A synonym comprises a Master File and, usually, an Access File. When you create a synonym with a name exceeding eight characters, the LONGSYNM setting currently in effect determines how the long name of the Master File and of the Access File will be handled.

You can issue DYNAM SET LONGSYNM anywhere SET commands are valid, including the global server profile (edasprof.prf) and a stored procedure (FOCEXEC).

The syntax is

DYNAM SET LONGSYNM {MVS|MATCH}

where:

MVS

Specifies that when you save a synonym with a name exceeding eight characters, FOCUS truncates the name, preserving up to the first six characters, followed by a left curly brace ({) and a suffix number that ensures the name is unique. (FOCUS preserves the original long name within the synonym files.)

For example, if you create a Master File named VERYLONGNAMETEST, it will be saved as VERYLO{0. If you then create a Master File named VERYLONGNAMEPROD, it will be saved as VERYLO{1.

FOCUS chooses a suffix number by taking the next unused number in the sequence for that truncation of a Master File or Access File name. If the next number available for the Master File is different than that available for the Access File, the files will be created with different numbers. For example, if the highest Master File name truncated to VERYLO is VERYLO{8, and the highest Access File name truncated to VERYLO is VERYLO{5, and you create a synonym specifying the name VERYLONGNAMEAGAIN, the new Master File will be saved as VERYLO{9, and the new Access File will be saved as VERYLO{6.

MATCH

Works the same as the MVS setting, except that it ensures that the truncated names of a Master File and Access File synonym will always match. That is, they will be named using the same suffix number.

In the example provided for the MVS setting, if SET LONGSYNM had instead been set to MATCH, both the new Master File and the new Access File would have been named VERYLO{9.

Matching names may be a convenience for some people if they manually manage synonym files. It is less efficient than the MVS setting, however.