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CEMT SET DSAS CEMT SET DSNAME
CEMT SET DSAS
Function: Change the system storage attributes.
Syntax: Press the Clear key to clear the screen. There are
two ways of commencing this transaction:
Type CEMT SET DSAS. You get a display that lists the
current status, similar to that obtained by CEMT
INQUIRE DSAS. You can then tab to the highlighted or
blank fields and overtype them with the required values.
Type CEMT SET DSAS followed by one or more attribute
settings that you wish to change. For example, cemt s
dsa ds(value) ed(value) will reset the values for
dynamic storage below the 16MB boundary and above
the 16MB boundary.
Typing ? at the beginning of either the first or second line
gives a syntax prompt. Resetting the values takes effect
immediately.
─ ──CEMT Set DSAs ──┬ ┬───────────────── ────────
└┘──Dsalimit(value)
─ ──┬ ┬────────────────── ─
└┘──EDsalimit(value)
Options
Dsalimit(
value
)
specifies the maximum amount of storage, as a total
number of bytes, within which CICS can dynamically
allocate storage for the four individual DSAs that reside
below the 16MB boundary. See the
CICS System
Definition Guide
for a description of the DSALIM system
initialization parameter.) If DSALIMIT specifies a value
lower than the current limit, CICS may not be able to
implement the new limit immediately, but will attempt to
do so over time as dynamic storage is freed in the
individual DSAs.
EDsalimit(
value
)
specifies the maximum amount of storage, as a total
number of bytes, within which CICS can dynamically
allocate storage for the four individual DSAs that reside
above the 16MB boundary. See the
CICS System
Definition Guide
for a description of the EDSALIM
system initialization parameter.) If EDSALIMIT specifies
a value lower than the current limit, CICS may not be
able to implement the new limit immediately, but will
attempt to do so over time as dynamic storage is freed
in the individual DSAs.
CEMT SET DSNAME
Function: Change the status of an external data set.
Description: With the SET DSNAME command, you can
change the status of a VSAM base data set. You can use
the command to perform the following actions on a data set:
Mark a VSAM data set as quiesced, or unquiesced,
throughout the sysplex.
Make a VSAM data set available or unavailable to a
CICS region. (The availability function does not operate
across the sysplex—a SET DSNAME(...) AVAILABILITY
command is effective only within the CICS region in
which it is issued.)
Retry all UOW log records that are shunted because of
the failures of this data set (other than in-doubt failures).
Force any UOWs that are shunted because of in-doubt
failures, and which have updated this data set, to
complete.
Purge shunted UOW log records that hold retained locks
(other than those due to in-doubt failures) for any
records in the data set, and release the retained locks,
Cancel any attempt to recover lost RLS locks for the
data set using the UOWACTION and
ACTION(RESETLOCKS) options.
The SET DSNAME command does not distinguish between
data sets accessed in RLS and non-RLS mode.
The new options for the SET DSNAME command are subject
to the following rules relating to the order of processing and
the combinations of keywords and multiple keywords on the
same command:
If REMOVE is specified, no other attribute is allowed.
Options are processed in the following order:
1. RECOVERED
2. UNQUIESCED
3. AVAILABLE
4. RETRY
5. UOWACTION
6. RESETLOCKS
7. UNAVAILABLE
8. QUIESCED.
If you specify RETRY, do not also specify UNAVAILABLE or
QUIESCED, because this would cause backout retries to fail.
UNQUIESCE should not be specified with other attributes,
because the other options may fail.
Some of the attributes of a data set cannot be set until the
first file that references the data set has been opened.
Where an attribute is not valid until a file has been opened,
an error is returned. Note that QUIESCESTATE is an
attribute that can be set before any files have been opened
against the specified data set.
176 CICS Supplied Transactions