If you do not already have a CSD in use at your installation:
- Decide how much disk space you require.
- Decide whether you want to use the CSD in RLS or non-RLS mode.
Having the CSD open in RLS mode allows more than one CICS® region
to update the CSD concurrently. However, if your CSD is defined as
a recoverable data set, and you want update it using the batch utility,
DFHCSDUP, you must quiesce the CSD in the CICS regions
before running DFHCSDUP.
If you decide to use RLS for the CSD,
specify CSDRLS=YES as a system initialization parameter. See VSAM record-level sharing (RLS).
- Decide whether the CSD is to be eligible for backup-while-open
(BWO6). If so, you require the following components
of DFSMS 1.2 or later:
If the CSD data set is to be eligible for BWO, it must have
an ICF catalog entry and be defined in SMS-managed storage. You must
also specify:
- CSDBKUP=DYNAMIC as a system initialization parameter for a CSD accessed in non-RLS mode,
and for which you have not specified recovery attributes in the ICF
catalog.
- BWO(TYPECICS) in the ICF catalog for a CSD accessed in RLS mode.
You can also specify BWO(TYPECICS) for a CSD accessed in non-RLS mode
if you have specified recovery attributes for the data set in the
ICF catalog.
- Define and initialize the CSD.
- Decide what CICS file processing attributes you
want for your CSD. Although the CSD is a CICS file-control-managed
data set, you define file control resource definitions for the CSD
by specifying CSDxxxxx system initialization parameters (see Defining CSD attributes).
- Decide what backup and recovery procedures you require for your
CSD.
- Decide if you want to use command logs for RDO; see Logging RDO commands for
details of the CADL, CAIL, CRDI, CSDL, CSFL, CSKL, CSPL, and CSRL
destinations that CICS uses for RDO command logs.
- Make the CSD available to CICS, either
by using dynamic allocation or by including the necessary DD statement
in the CICS startup job stream. For dynamic allocation
of the CSD, you name the fully qualified data set name, and the disposition,
on the CSDDSN and the CSDDISP system initialization parameters respectively.
When you have
started CICS, test the RDO transactions CEDA, CEDB, and CEDC. For information about these transactions, see the CICS Resource Definition Guide.
- Finally, if you want to restrict access to particular CICS-supplied
transactions by applying security, define the necessary transaction
profiles to RACF® or other external security manager (ESM) and
authorize userids as appropriate. For information about how to do
this, see the CICS RACF Security Guide.
For information about migrating CICS control
tables to RDO using the MIGRATE command, see the CICS Operations and Utilities Guide.
Eligibility for BWO
means that DFSMS components can back up the CSD while the data set
is open for update.
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