After
you have installed CICS®, and applied any necessary service,
you can run the DFHCOMDS, DFHDEFDS, and DFHCMACI jobs to create the CICS data
sets.
CICS supports access to the following types
of data sets:
- Key-sequenced data set (KSDS). With releases of DFSMS/MVS
1.4 and later, a data set can be greater than 4 GB in size if it is
defined as extended format and extended addressability in the storage
class. CICS supports, in both RL and non-RLS mode, KSDS data sets
that are defined with these extended attributes.
- Entry-sequenced data set (ESDS). With releases of DFSMS/MVS
1.5 and later, a data set can be greater than 4 GB in size if it is
defined as extended format and extended addressability in the storage
class. However, CICS does not support ESDS data sets that are defined
with these extended attributes. Attempts
to open data sets defined with the extended attribute fail with error
message DFHFC0966, codes 8504, 0008, and 0068
for non-RLS
access and message DFHFC0905 for RLS access.
- Relative record data set (RRDS). With releases of DFSMS/MVS 1.5
and later, a data set can be greater than 4 GB in size if it is defined
as extended format and extended addressability in the storage class.
CICS supports access to extended RRDS or VRRDS datasets if
you use an RRN that can be specified in a four-byte RRN field to access
the records that reside beyond the 4 GB boundary. 
VSAM Data sets and z/OS® 1.3
If you are using z/OS 1.3 or above, read Information
APAR II13288.
It reports that the level of DFSMS supplied with z/OS 1.3
has changed the way that index controlintervalsize (CISIZE) is calculated
for those VSAM data sets that have index components. As a result,
large default CIsizes can be expected, and this can cause open errors
during CICS start-up.
This applies to both CICS data sets and your own application
data sets.
- Job
- Function
- DFHCOMDS
- Deletes and recreates data sets common to all CICS regions.
- DFHDEFDS
- Deletes and recreates copies of data sets that are used only
by one CICS region. You run a separate copy of this job
to create the data sets for each CICS region.
- DFHCMACI
- Deletes and recreates the CICS messages
data set, dsindex.DFHCMACD, and loads it with the data from the CICS-supplied
file, DFHCMACD, in the hlq.SDFHMSGS target library.
- DFH0JCUS
- Deletes and recreates the sample applications details data set,
dsindex.SAMPLE.DFHCTCUS (and its associated alternate index and path),
and loads it with the data from the CICS-supplied file, DFH0DCUS,
in the hlq.ADFHAPD2 library.
- DFH0JHLP
- Deletes and recreates the sample applications help data set,
dsindex.SAMPLE.DFHCTHLP, and loads it with the data from the CICS-supplied
file, DFH0DHLP, in the hlq.ADFHAPD1 library.
When you ran DFHISTAR, these jobs were tailored to your environment
and stored in the library that you specified on the LIB parameter
of DFHISTAR (by default, hlq.XDFHINST). If you have not yet
run DFHISTAR, you should do so before running any of the CICS post-installation
jobs.
You can generate several copies of these jobs by rerunning DFHISTAR,
selecting the jobs that you want to copy. To generate new copies of
these jobs, edit DFHISTAR to specify new values for the DSINFO and
SELECT parameters. Only those jobs that you name by the SELECT parameter
are regenerated.
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