File Utility Programming (FUP) Reference Manual

FUP Commands
File Utility Program (FUP) Reference Manual—523323-015
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SET Parameter for Files on SMF Virtual Disks
For each 28 KB of data of unstructured files on 512 byte sector disks, one 4 KB check
block with the checksum data is allocated. For extent management, check blocks are
added to the file size and extents are aligned to include check blocks. For I/O
management, all unstructured I/Os are in units of 32 KB (28 KB user data and 4 KB
check block).
SET Parameter for Files on SMF Virtual Disks
This option is available only for SMF files (all other parameters are valid for SMF files):
PHYSVOL [ physvol ]
specifies the physical volume where a file should be created. This option overrides
any SMF parameters after the CREATE command creates a file on the virtual disk.
The value of physvol specified must be included in the storage pool associated
with the SMF virtual disk process.
SET Guidelines

The SET command sets the file-creation attributes only for the current session of
FUP. Each time you start a new FUP session (when you type FUP at the command
interpreter prompt), the attributes are reset to their default values. You must use
FUP in the interactive mode to use the SET and SHOW features.

The REFRESH, DCOMPRESS, ICOMPRESS, and COMPRESS attributes are not
passed to alternate-key files when you create the primary-key file. To set these
attributes, include the NO ALTCREATE option and create the alternate-key files in
a separate operation.

If you use the PHYSVOL option with the SET command, it applies to each
subsequent CREATE command until it is reset. An error occurs during a CREATE
command if the PHYSVOL specified does not belong to the volume specified in the
CREATE command.

For an enhanced key-sequenced file, the SET EXT command accepts both pri-
extent-size and sec-extent-size but if the primary extent size is less than
140, DP2 creates primary partition with an primary extent size of 140.

After using the SET LIKE command, if the user changes the KEYLENGTH value,
the LOCKLENGTH value does not change accordingly. The LOCKLENGTH value
needs to be changed explicitly.

The extent size is rounded up when you create a file according to these rules:

The extent size must be a multiple of the block size (for DP2 structured files).

The extent size must be a multiple of the unstructured buffer size (for DP2
unstructured files).
Note. For information on extent-size rounding, see the Enscribe Programmer’s Guide.