CA Dynam for VSE User Guide

Basic Components
Overriding Cataloged Expiration Dates
The expiration date defined in a Catalog entry will be used at file creation
time. You can temporarily override it by specifying a new expiration date on
the DLBL statement for that file.
VOLSER Identification
CA Dynam Catalog management identifies the actual VOLSER for each extent
as it is allocated for a file. Using this real VOLSER when the file is opened for
input, the time required to locate the file is reduced, because CA Dynam/D
does not have to scan through a POOL of disk volumes.
Catalog-Controlled Files
CA Dynam/D Catalog-controlled files can be accessed or created through
IDCAMS by including a blank EXTENT statement behind each file's DLBL.
Example,
// DLBL FILEIN,'Catalog.Controlled.File1'
// EXTENT
// DLBL FILEOUT,'Catalog.Controlled.File2'
// EXTENT
// EXEC IDCAMS,SIZE=AUTO
REPRO INFILE (FILEIN ENV(BLKSZ(500),RECFM(FB))) -
OUTFILE (FILEOUT ENV(BLKSZ(5000),RECFM(FB)))
The EXTENT statement with no parameters has the following purposes:
• It avoids IDCAMS cancelling during pre-OPEN checking for lack of EXTENT
information.
• It signals CA Dynam/D that processing is necessary on behalf of this file so
that when the OPEN is issued by IDCAMS, CA Dynam/D will locate the file
in the CA Dynam Catalog and perform dynamic LUB allocation as
necessary.
Temporary Data Sets
Any data set that is created and deleted within the same job is a temporary
data set. To define a temporary data set, specify a 3—10 character data set
name including the following:
• ## as a 2-character prefix (pound or hash signs)
• 8 additional alphanumeric characters
4–8 User Guide