CA Dynam for VSE User Guide

Changing File Characteristics
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IBM DLBL Parameters
The IBM DLBL parameters are as follows:
filename
'dataset-name'
retention
type
Indicates the standard IBM DTF file name.
Indicates the standard IBM data set name.
Indicates the standard IBM retention period specification.
Indicates the standard IBM access method type specification. If the DLBL type
and/or retention are omitted, the commas following those fields must be
supplied. CA Dynam/FI does not begin searching for its options until the fifth
positional parameter.
Valid (notice commas): // DLBL FILE,'TEST',NOTAPE
Invalid (commas missing): // DLBL FILE,'TEST',NOTAPE
But, if the first CA Dynam/FI operand is a keyword, you may omit commas
when you omit retention and/or type, as shown:
// DLBL FILE,'TEST',BLKSZ=OPT,NOTAPE
IBM DLBL options
Indicate the IBM DLBL optional parameters. (See previous note in relation to
"type.")
CA Dynam/FI Operands
The remaining operands are as follows:
BLKSZ= Specifies the block size for the file. It is either a decimal number between 1
and 65535, or the keyword OPTIMIZE (or OPT). If you specify OPTIMIZE, CA
Dynam/FI recalculates the block size for the physical unit on which the data
set resides. Note that this may not be the maximum block size for the device.
When BLKSZ=OPT is specified, CA Dynam/FI uses the OPTBLKS value defined
in the DYNAM/FI option record for disk files during the installation procedure.
If full-track blocking was indicated, then the block size value is set to the
approximate track size of the particular disk device type. For example, files on
3330 disks are given a block size value which is a multiple of the record length
and as close to 13,030 bytes as possible. If you specify BLKSZ=OPT and the
disk device type is FBA, the CISIZE, not the block size, is recalculated. With
FBA, the block size will not be changed.
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