Answer / shilpa umesh

In any VSAM file the last qualifier is DATA, the only KSDS
file contain DATA and INDEX. If any dataset contain these
qualifier the dataset is VSAM only

EXAMPLE. VSAM FILE
TCOM.MNMT.X0060X.DDD.D250510
TCOM.MNMT.X0060X.DDD.D250510.DATA
TCOM.MNMT.X0060X.DDD.D250510.INDEX

EXAMPLE. SWQUENTIAL FILE
TCOM.MNMT.X0060X.DDD.D250510

Thanks,
Shilpa

Answer / mhdee

Most of the time the answer is YES, because most shops have
a standarsd naming for the high qualifire node for VSAM
files. Other than that you have to use TSO option 3.4 "Data
Set List Utility", which will give you the DATA and INDEX
part of the file.

Answer / amjtih

if it is a VSAM Define step, yes, we can. if using an
existing VSAM file, by looking to JCL,its difficult
provided if there is no defined naming convention.
other than that, just try to open via ispf 3.4 option, and
if it is VSAM, that will show the message. if KSDS, then
Data and Index elements can view.

Answer / madan kumar

from define cluster statement we can easily say,
we specify parameters
INDEXED ---> for KSDS.
NUMBERED ---> for RRDS.
nothing will be given for ESDS

Answer / raghavendra

Incase of KSDS, file will have '.CL' as the last qualifier
of the Dataset. This helps to identify, whether the File is
Flat file or VSAM. However, the VSAM Files can be created
without this Qualifier or with Flat file naming Convention.
For ex: WIP161.DDIO.XPD -- DDIO FILE for Xpeditor. This
file can be either VSAM or Flat File. In such cases, it's
difficult to distinguish.
Since most of the VSAM Files are created with '.cl' as the
last qualifier, files can be identified quickly inthe JCL
with this qualifier.

Thank You,
Raghu.

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1 Answers  

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