Shadow jobs

A shadow job is a job defined on the local workstation which is used to map a job running on a remote workstation, called a remote job. You can use shadow jobs to integrate the workload running on different engines, which can be engines or engines.

Shadow jobs are defined using XML syntax. The key attributes to identify the remote job instance and the related matching criteria depend on the type of remote engine where the remote job instance is defined. Fields highlighted in bold are those used to identify the remote job instance.

Because z/OS engines support only closest preceding matching criteria the XML template to define a z/OS shadow job is the following:

$JOBS
WORKSTATION#ZSHADOW_CLOS_PRES
 TASK
    <?xml version="1.0" encoding="UTF-8"?>
    <jsdl:jobDefinition 
       xmlns:jsdl="http://www.ibm.com/xmlns/prod/scheduling/1.0/jsdl"
       xmlns:zshadow="http://www.ibm.com/xmlns/prod/scheduling/1.0/zshadow">
    <jsdl:application name="zShadowJob">
    <zshadow:ZShadowJob>
    <zshadow:JobStream>JobStream</zshadow:JobStream>
    <zshadow:JobNumber>JobNumber</zshadow:JobNumber>
    <zshadow:matching>
    <zshadow:previous/>
    </zshadow:matching>
    </zshadow:ZShadowJob>
    </jsdl:application>
    </jsdl:jobDefinition>
 DESCRIPTION "Sample Job Definition"
 RECOVERY STOP

Note: Make sure that you enter valid settings in the JobStream and JobNumber fields.

Distributed shadow jobs support the four matching criteria available for external dependencies.

The following shows the XML templates you can use to define distributed shadow jobs:

Matching criteria: Closest preceding

XML sample:

$JOBS
WORKSTATION#DSHADOW_CLOS_PRES
 TASK
    <?xml version="1.0" encoding="UTF-8"?>
    <jsdl:jobDefinition 
       xmlns:jsdl="http://www.ibm.com/xmlns/prod/scheduling/1.0/jsdl"
       xmlns:dshadow="http://www.ibm.com/xmlns/prod/scheduling/1.0/dshadow">
    <jsdl:application name="distributedShadowJob">
    <dshadow:DistributedShadowJob>
    <dshadow:JobStream>JobStream</dshadow:JobStream>
    <dshadow:Workstation>Workstation</dshadow:Workstation>
    <dshadow:Job>Job</dshadow:Job>
    <dshadow:matching>
    <dshadow:previous/>
    </dshadow:matching>
    </dshadow:DistributedShadowJob>
    </jsdl:application>
    </jsdl:jobDefinition>
 DESCRIPTION "Sample Job Definition"
 RECOVERY STOP

Matching criteria: Within an absolute interval

XML sample:

$JOBS
WORKSTATION#DSHADOW_ABSOLUTE
 TASK
    <?xml version="1.0" encoding="UTF-8"?>
    <jsdl:jobDefinition 
          xmlns:jsdl="http://www.ibm.com/xmlns/prod/scheduling/1.0/jsdl"
          xmlns:dshadow="http://www.ibm.com/xmlns/prod/scheduling/1.0/dshadow">
    <jsdl:application name="distributedShadowJob">
    <dshadow:DistributedShadowJob>
    <dshadow:JobStream>JobStream</dshadow:JobStream>
    <dshadow:Workstation>Workstation</dshadow:Workstation>
    <dshadow:Job>Job</dshadow:Job>
    <dshadow:matching>
    <dshadow:absolute from="0600 -4" to="1100 +3"/>
    </dshadow:matching>
    </dshadow:DistributedShadowJob>
    </jsdl:application>
    </jsdl:jobDefinition>
 DESCRIPTION "Sample Job Definition"
 RECOVERY STOP

Matching criteria: Within a relative interval

$JOBS
WORKSTATION#DSHADOW_RELATIVE
 TASK
    <?xml version="1.0" encoding="UTF-8"?>
    <jsdl:jobDefinition 
          xmlns:jsdl="http://www.ibm.com/xmlns/prod/scheduling/1.0/jsdl"
          xmlns:dshadow="http://www.ibm.com/xmlns/prod/scheduling/1.0/dshadow">
    <jsdl:application name="distributedShadowJob">
    <dshadow:DistributedShadowJob>
    <dshadow:JobStream>JobStream</dshadow:JobStream>
    <dshadow:Workstation>Workstation</dshadow:Workstation>
    <dshadow:Job>Job</dshadow:Job>
    <dshadow:matching>
    <dshadow:relative from="-400" to="+500" />
    </dshadow:matching>
    </dshadow:DistributedShadowJob>
    </jsdl:application>
    </jsdl:jobDefinition>
 DESCRIPTION "Sample Job Definition"
 RECOVERY STOP

Matching criteria: Same scheduled date

XML sample:

$JOBS
WORKSTATION#DSHADOW_SAMEDAY
 TASK
    <?xml version="1.0" encoding="UTF-8"?>
    <jsdl:jobDefinition 
          xmlns:jsdl="http://www.ibm.com/xmlns/prod/scheduling/1.0/jsdl"
          xmlns:dshadow="http://www.ibm.com/xmlns/prod/scheduling/1.0/dshadow">
    <jsdl:application name="distributedShadowJob">
    <dshadow:DistributedShadowJob>
    <dshadow:JobStream>JobStream</dshadow:JobStream>
    <dshadow:Workstation>Workstation</dshadow:Workstation>
    <dshadow:Job>Job</dshadow:Job>
    <dshadow:matching>
    <dshadow:sameDay/>
    </dshadow:matching>
    </dshadow:DistributedShadowJob>
    </jsdl:application>
    </jsdl:jobDefinition>
 DESCRIPTION "Sample Job Definition"
 RECOVERY STOP

For more information about the matching criteria, see awsrgextfolldep.html.