If you specify START=INITIAL, CICS® performs an initial start as if you are
starting a new region for the first time. This initial start of a CICS region is different
from a CICS region that initializes with a START=COLD parameter, as follows:
- The state of the global catalog is ignored. It can contain either data
from a previous run of CICS, or it can be newly initialized. Any previous data
is purged.
- The state of the system log is ignored. It can contain either data from
a previous run of CICS, or it can reference new log streams. CICS does not keep
any information saved in the system log from a previous run. The primary and
secondary system log streams are purged and CICS begins writing a new system log.
- Because CICS is starting a new catalog, it uses a new logname token in the "exchange lognames" process when connecting to partner systems. Thus, remote
systems are notified that CICS has performed a cold start and cannot resynchronize.
- User
journals are not affected by starting CICS with the START=INITIAL parameter.
Note:
An initial start can also result from a START=COLD parameter
if the global catalog is newly initialized and does not contain a recovery
manager control record. If the recovery manager finds that there is no control
record on the catalog, it issues a message to the console prompting the operator
to reply with a GO or CANCEL response. If the response is GO, CICS performs an
initial start as if START=INITIAL was specified.
For more information about the effect of the state of the global catalog
and the system log on the type of start CICS performs, see the CICS System Definition Guide.
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