IBM System/370 Operator's Reference Manual page 183

OS/VS2 Checkpoint Restart
Source: GC26-3784 OSNS Checkpoint/Restart
HOW TO RESTART A JOB
Automatic Restart
During processing related to automatic checkpoint/restart in VS2, the system issues the
following sequence of messages to the operator:
1. A message each time a checkpoint entry is written. Each message contains
the checkpoint id.
2. An ABEND message for the job step if it terminates abnormally:
IEF4501 jobname,stepname,procstepname ABEND code
3. If the ABEND code makes the job step eligible for restart, the system issues
this message:
xxi EF225D SHOU LD jobname.stepname.procstepname [checkid] RESTART
to which the operator must reply:
{
'YES' }
rid, 'HOLD'
'NO'
YES authorizes the restart, HOLD postpones it, and NO prohibits it. If
restart is authorized and MONITOR JOBNAMES is in effect, messages
IEFREINT STARTED and IEFREINT ENDED will appear. IEFREINT is the
name of the 'restart reader:
4. Message indicating the virtual storage requirements (beginning address and
ending address) of the job step to be restarted.
5. Normal mount messages.
6. A successful restart message.
Deferred Restart
To perform a deferred step restart in VS2, the job to be restarted must be resubmit·
ted. Messages containing checkpoint entry ids displayed previously on the console
during original execution of the job may be used by the programmer preparing the job
for resubmission. When the resubmitted job is restarted, the operator will receive these
messages on the console:
1. A message indicating vir:tual storage requirements of the job.
2. Normal mount messages.
3. A successfu I restart message.
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