CA Dynam for VSE User Guide

Defining File ID Option Codes
F
Fragment allocation
This option code can be specified to force CA Dynam/D to fragment space
allocation for the file. When this option is specified and the requested amount
of DASD space is not available on the specified volume, the largest piece of
contiguous space is allocated to the data set.
If the DASD space becomes full, the user must have supplied additional extent
definitions or must have the automatic secondary allocation facility available.
Otherwise, the job will be canceled with the IBM NO MORE AVAILABLE
EXTENTS message. Note that there is no minimum space limit for the
allocation.
The largest amount of free space available on the volume will be allocated,
regardless of how small it is. If the specified volume is a CA Dynam/D pool,
the space will be allocated from the first pool volume containing free space.
If, for example, the second volume defined in the pool had enough free space
to allocate the complete request, but the first volume contained only half the
requested amount of free space, the extent would be allocated from the first
volume.
G#nn
Generational number
This option requests access to the file version whose generation number,
assigned in the catalog at file creation time, is specified here. For example,
• To reference the first version created, specify G#01.
• To reference the second version, specify G#02.
G-nn
Relative generation number
Requests access to the file version relative to the most current one, which is
designated as version G-0. Specifying option code G-0 would access the most
current version; G-1 accesses the next most current one. For example,
• To reference the most current version, specify G-0.
• To reference the next oldest version, specify G-1.
Gen=nnn
I
This option requests access to the absolute generation number assigned when
the version is created.
Informative messages to SYSLST
Indicates that CA Dynam/D informative messages are to be directed to
SYSLST. Note that, if informative messages are not requested at the time CA
Dynam/D is installed, then the option code I must be specified in order to
obtain these messages on SYSLST.
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