A cron expression natively supports only scheduling intervals, in minutes, that can be divisible by 60. For example, if you want to schedule a job at an interval of 40 minutes, you can use a fixed-rate polling mechanism instead of cron expressions. The fixed-rate polling mechanism is suitable for scheduling jobs at intervals that cannot be divisible by 60 and uses simple expressions. However, the fixed-rate polling mechanism does not support scheduling intervals in seconds.
Configure fixed-rate scheduling
You can configure fixed-rate scheduling when you create a job. For more information about how to create a job, see Create a job. This topic describes how to configure fixed-rate scheduling when you create a job.
In the Create task panel, go to the Timing configuration step. For more information, see Create a job.
In the Timing configuration step, configure the related parameters and click Next Step.
Select fixed_rate from the Time type drop-down list.
Specify a value for the Fixed frequency parameter.
NoteThe value of the Fixed frequency parameter must be greater than or equal to 10. Unit: seconds. If you want to run jobs more frequently, use XXL-JOB instead.
Optional. In the Advanced Configuration section, specify the Time offset, Time zone, and Effective time parameters based on your business requirements.
The following table describes the parameters in the Advanced Configuration section.
Parameter
Description
Default value
Time offset
Specify the offset of the data time relative to the scheduling time. The value can be obtained from the context when a job is scheduled.
None
Time zone
Select a time zone based on actual situations, such as a time zone of a country or region or a GMT time zone.
None
Effective time
Specify the start time of the job.
Effective immediately