|
|
|
VSAM KSDS and ESDS record formats are essentially the same, whether the user considers the data set fixed or variable length. However, in the case of non-VSAM data sets there is a sharp distinction among fixed, variable, and undefined record formats. Compression changes these attributes, but applications expect to handle the data in its original uncompressed format, and so the uncompressed attributes must be preserved in the Control File for CA Compress OPEN processing.
Four parameters enable you to specify DCB attributes for the data set using the IUI or the CFMU: DCBMODEL, RECFM, LRECL, and BLKSIZE. DCBMODEL specifies a cataloged data set from which to take DCB parameters, and the other three, if coded, supply or override individual values.
The DCBMODEL data set can be any PS or PO data set except a compressed data set not defined as PST, because for such a data set no uncompressed attributes are available. If a compressed non-PST data set is specified for DCBMODEL, CA Compress issues a diagnostic message and rejects the statement.
| Copyright © 2012 CA. All rights reserved. |
|