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@ The third group consists of two jobs which together control the E initiation of three sequential jobs to do the final reporting on the k results of the database update, as shown in Figure 5-4 Third Group of Jobs.
/ Figure 5-4 Third Group of Jobs
E The normal initiation of jobs in the third group occurs when job B24 E from the second group of jobs succeeds, at which time both job F and E job G are initiated. Job F prepares a report on the database status. G Job G updates the snapshot of the database at remote nodes. When job G A successfully completes, job H is initiated, but since job F is a A prerequisite for job H, job H must wait until job F successfully completes.
E The abnormal initiation of jobs in the third group occurs when job C G from the second group successfully completes, at which time both job F < and job H are initiated. Again, job H must wait until job F ? successfully completes since job F is a prerequisite for job H.
F Job H prints out a report on the snapshot status at the remote nodes. E When job H successfully completes, job I is initiated. Job I updates F the weekly summarization data report. If job I succeeds, the complete B task has finished. If job I fails, job J is initiated to log this failure. W 5.2 Create and configure jobs
C In this section, DCL commands are used to illustrate how the daily 8 database update job sequence was created and configured. @ 5.2.1 Create directory and jobs
C As the first step, directory [DEMO.D] and each of the jobs must be created.
? To create the [DEMO.D] directory for the job sequence, use the following DCL command:
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" % $ SCHEDULE CREATE/DIRECTORY [DEMO.D] |
H To create the jobs for the daily database update, use the following DCL commands:
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" $ SCHEDULE CREATE [DEMO.D]A1- 3 _$/GENERAL=COMMENT:"Startup check before database" $ SCHEDULE CREATE [DEMO.D]A2- ) _$/GENERAL=COMMENT:"Backup the database" . . . $ SCHEDULE CREATE [DEMO.D]I- = _$/GENERAL=COMMENT:"Update weekly summarization report data" $ SCHEDULE CREATE [DEMO.D]J- @ _$/GENERAL=COMMENT:"Log failure of weekly summarization update" |
H To confirm which jobs have been created, use the following DCL commands:
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" $ SCHEDULE DIRECTORY [DEMO.D]* Job directory [DEMO.D] A1 A2 A3 B1 B21 B22 B23 B24 C D E F G H I J Total of 16 jobs / $ SCHEDULE DIRECTORY [DEMO.D]*/GENERAL=COMMENT Job directory [DEMO.D] ( A1 Startup check before database update A2 Backup the database . A3 Place holder for after backup the database " B1 Initial update of the database B21 Main update to the database ' B22 Sort the output of database update ( B23 Final processing of database update 4 B24 Print out results of successful database update - C Restore some of database from backup files 4 D Purge files to make room for database sort output E Restore backup to allow retry $ F Prepare report on database status . G Update snapshot of database at remote nodes & H Print out report of snapshot update * I Update weekly summarization report data - J Log failure of weekly summarization update Total of 16 jobs |
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