The Reclaim Storage in Batch command is designed to allow you to run
RCLSTG (requires the restricted state) in batch. This allows
scheduling of RCLSTG using the Job Scheduler or the SBMJOB
SCDDATE/SCDTIME function. The RCLSTG2 command which is a front end
to RCLSTG is used as it provides a better historical view of the
Reclaim Storage results.
Ensure that the RCLSTG command is set for ALLOW(*ALL). This may
require a change on your system.
The job must be submitted to a job queue that will run in the
controlling subsystem.
The user must be authorized to the TAARCLSTG2 Authorization List. If
you intend to use RCLSTGBCH, you should consider making the RCLSTG
command private so that users such as QSYSOPR are forced to use
RCLSTGBCH (or RCLSTG2).
A job log is always output. The TAA command DSPRCLHST may be used to
review the past results.
Getting started
---------------
** You may want to have a program such as described for the EXIT1
parameter to inform users that you are going to shutdown the
system. Assume your create this program as RCLSTGMSG.
** The RCLSTGBCH command could be entered with a SBMJOB command
to run at a specific time using the SBMJOB SCDDATE and SCDTIME
parameters. You must ensure that the job queue used is in the
controlling subsystem.
SBMJOB JOB(RCLSTGBCH) CMD(RCLSTGBCH +
EXIT1(xxx/RCLSTGMSG)) +
SCDDATE(nnnnnn) SCDTIME(nnnnnn)
Controlling subsystem
---------------------
The RCLSTGBCH function will cause the controlling subsystem to be
started at completion.
Starting the controlling subsystem causes the program defined for the
QSTRUPPGM system value to be run which normally causes other
subsystems to be started as if an IPL has occurred.
If you have specified POWERDOWN(*YES) on RCLSTGBCH, the power down
function occurs after the reclaim function.
A900 0370 System Reference Code
-------------------------------
While running in the restricted state caused by a batch program, the
system will set the System Reference Code to A900 0370.
If the restricted state lasts for more than the specified time for
RSDTIMLMT value (default is 360 minutes), the system starts the
controlling subsystem.
Handling of error conditions
----------------------------
If an error occurs, the STRSBS command is used to start the
controlling subsystem. STRSBS may fail with two typical conditions:
** CPF1099 Attempting to end. A prior request has been made to
end the subsystem. This could occur if the system cannot
reach the restricted state and is still trying to end the
controlling subsystem when STRSBS is used.
** CPF1010 Already started.
In both cases, the job waits 2 minutes and re-tries the command
again. After 5 retries (or if an unexpected STRSBS error occurred),
PWRDWNSYS *IMMED with RESTART(*YES) is used.
The intent is to either complete the function normally or ensure the
system has been re-IPLed.
RCLSTGBCH escape messages you can monitor for
---------------------------------------------
None. Escape messages from based on functions will be re-sent.
RCLSTGBCH steps
---------------
The command would typically be submitted to batch by either a job
scheduling function or the time delay of SBMJOB (or DLYSBMJOB).
** A job log is forced by specifying CHGJOB LOG(4 0 *SECLVL).
** The named Exit programs are checked for existence.
** The parameters of RCLSTGBCH are sent as messages to the job
log.
** If an Exit 1 program is specified, it is called.
** ENDSBS is used to enter the restricted state. The command run
is:
ENDSBS SBS(*ALL) OPTION(*IMMED) +
DELAY(300) BCHTIMLMT(nnn)
where the BCHTIMLMT value from the RSDTIMLMT parameter is
used.
The *IMMED option will cause the system to end any jobs
immediately. The job waits 5 minutes before checking to see
if the restricted state has been reached.
If the restricted state has not been reached, the job waits 60
seconds and tries again. This loop continues until either the
restricted state is achieved or the RSDMIN limit is reached.
If the limit is reached, WRKACTJOB is used to list the jobs
which cannot be terminated (along with the RCLSTGBCH batch
job), the controlling subsystem is restarted, and the job ends
abnormally.
** If the restricted state is reached and an Exit 2 program is
specified, it is called.
** RCLSTG2 is used which invokes RCLSTG.
** If POWERDOWN(*YES) is specified, PWRDWNSYS is used with the
RESTART parameter specified on RCLSTGBCH.
** If POWERDOWN(*NO) is specified, the STRSBS command is used to
start the controlling subsystem. If an Exit 3 program is
specified, it is called.
RCLSTGBCH Command parameters *CMD
----------------------------
SELECT What reclaim functions to select. The default is
*ALL.
*QDBXREF may be specified to rebuild the system
internal cross reference files.
*DIR may be specified to rebuild only the directory
portion.
OMIT What reclaim functions to omit. The default is
*NONE.
*QDBXREF may be specified to omit the rebuilding of
the system internal cross reference files.
*DIR may be specified to omit the rebuild of the
directory function.
ASPDEV The ASP device or group. *SYSBAS is the default.
This describes system ASP and ASPs 2-32.
A specific ASP device or group may be named.
RSDMIN The number of minutes to wait before the restricted
state is achieved. 15 minutes is the default. 999
minutes is the maximum.
The RCLSTGBCH command begins by requesting that all
subsystems be ended with the command:
ENDSBS SBS(*ALL) OPTION(*IMMED) +
BCHTIMLMT(xxx)
The system performs an immediate cancel of any
active jobs (other than the RCLSTGBCH job).
If the restricted state cannot be achieved in the
number of minutes specified, WRKACTJOB is used to
produce a listing of the jobs which are still
active, the RCLSTGBCH command ends abnormally and
the controlling subsystem is restarted.
RSDTIMLMT The number of minutes the system can remain in the
restricted state. 360 (6 hours) is the default.
The value must be between 30 and 999.
If the value is exceeded, the system ends the
RCLSTGBCH function and restarts the controlling
subsystem.
If the reclaim operation completes before the time
limit, the controlling subsystem is started which
ends the restricted state.
If you do not know the approximate time that a
reclaim will take, use the ESTIMATE parameter on
RCLSTG. This will give you an approximation which
will assist you in determining the number of minutes
to specify for RSDTIMLMT.
POWERDOWN A *YES/*NO option for whether the system will be
powered down after the RCLSTG is performed.
*NO is the default. The controlling subsystem would
be restarted when the job running SAVSYSBCH ends.
This causes the program specified for the QSTRUPPGM
system value to be run.
*YES may be specified to power down the system. See
also the RESTART parameter. If *YES is specified,
the power down occurs after the EXIT3 option.
RESTART A *YES/*NO option for whether the system should be
restarted after a powerdown.
*NO is the default.
*YES may be specified to restart the system after
the powerdown if POWERDOWN(*YES) is specified. The
function runs by using PWRDWNSYS RESTART(*YES).
EXIT1 An optional program to be called before ENDSBS is
used to enter the restricted state. If the library
qualifier is blank, *LIBL is used to find the
program.
The intent of this parameter is to allow a function
such as sending messages to any interactive jobs
stating that the system is shutting down and that
jobs will be cancelled. A good command to consider
is SNDBRKACT such as:
/* Send RCLSTG message program */
PGM
TAATOOL/SNDBRKACT MSG('Please signoff. We +
are shutting down for +
RCLSTG in 5 minutes.')
DLYJOB DLY(300)
ENDPGM
EXIT2 An optional program to be called after the
restricted state is reached and before the reclaim
function begins. If the library qualifier is blank,
*LIBL is used to find the program.
EXIT3 An optional program to be called after the reclaim
function is completed and before the POWERDOWN
option is checked. If the library qualifier is
blank, *LIBL is used to find the program.
If the job running RCLSTGBCH specifies
POWERDOWN(*NO), the system starts the controlling
subsystem when the job ends. This invokes the
program in the QSTRUPPGM system value. This
normally starts various system jobs as if an IPL had
occurred.
Restrictions
------------
You must be authorized to the TAARCLSTG2 *AUTL to use RCLSTGBCH.
The job must be submitted to a job queue that will run in the
controlling subsystem.
Prerequisites
-------------
The following TAA Tools must be on your system:
CHKRSDSTE Check restricted state
CHKTAAOWN Check TAA owner
EDTVAR Edit variable
RCLSTG2 Reclaim storage 2
RSNLSTMSG Resend last message
RTVIPLSTS Retrieve IPL status
SNDCOMPMSG Send completion message
SNDESCINF Send escape information
SNDESCMSG Send escape message
Implementation
--------------
None, the tool is ready to use.
Objects used by the tool
------------------------
Object Type Attribute Src member Src file
------ ---- --------- ---------- ----------
RCLSTGBCH *CMD TAARCLB QATTCMD
TAARCLBC *PGM CLP TAARCLBC QATTCL
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