Ibm SC34-6814-04 Manuel d'utilisateur télécharger pdf (Page 712)

100

101

End

to terminate the sample program

Open

to ask the overseer to try to open CICS availability manager (CAVM) data sets

that it has previously failed to open.

The full format of the operator command entered at the MVS console is:

MODIFY overseer-jobname,command-identifier

where “command-identifier” is Display, Restart, Snap, End, or Open, or an

abbreviation of any of these. The Display and Restart commands control the two

major functions of the sample overseer program, which are described below. The

Open command is described under “Opening CAVM data sets dynamically” on page

692.

The display function

When the operator enters the Display command at the MVS console, the sample

overseer program issues a multiline write-to-operator (MLWTO) command showing

the last known state of each of the active-alternate pairs that it is monitoring. The

overseer retrieves this information from the control and message data sets, in which

the CICS availability manager (CAVM) has been recording state and surveillance

information. The display includes a title line and one line of status information for

each active-alternate pair. The title line is as follows:

GEN-APP ACT-JOB ACT-APP ACPU A-ST BKP-JOB BKP-APP BCPU B-ST

Each line of status information provides the following:

v The generic applid of the active-alternate pair (GEN-APP)

v The CICS job name of the active (ACT-JOB) and of the alternate (BKP-JOB)

v The specific applid of the active (ACT-APP) and of the alternate (BKP-APP)

v The SMF IDs of the CPUs on which the active and the alternate were last known

to be executing (ACPU and BCPU)

v The last known status of the active (A-ST) and of the alternate (B-ST). The status

value can be one of the following:

ACT Active signed on normally and running the active CICS workload.

BACK Alternate signed on and running normally.

SOFN Signed off normally.

SOFA Signed off abnormally.

TKOV Taking over (alternate only).

INCA Incipient active, meaning that an alternate CICS is taking over from an

active CICS. The active job has signed off abnormally, and the incipient

active is waiting for the active job to terminate.

TKIP Takeover in progress. An alternate CICS is attempting a takeover of this

active system. When the takeover is complete, the status is changed.

UNKN Unknown—the overseer has no current information about the status,

which was in an intermediate state when the Display command was

processed. Reissuing the Display command causes UNKN to be

replaced by another status value.

OLD The information displayed for the alternate refers to out-of-date

information about the system that was the alternate until a recent

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