在运行作业以前，执行清单1中的步骤以便在DB 2数据库中创建数据库和表。
Before running the job, perform the steps in Listing 1 to create the database and table in your DB2 database.
以一定的时间间隔运行作业需要使用cron设施进行管理，它由crond守护进程和一组表(描述执行哪些操作和采用什么样的频率)组成。
Running jobs at regular intervals is managed by the cron facility, which consists of the crond daemon and a set of tables describing what work is to be done and with what frequency.
作业参数存储在哈希表中，并当作业执行时将其发送到设备类的插件代码中。
Job parameters are stored in a hashtable and are passed to the device class plug-in code when the job is executed. Create a job object for setting job definition attributes as shown below.
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