Scheduling
Schedo.dev provides flexible scheduling options for running jobs, supporting cron expressions
Cron Expressions
Jobs can be scheduled using standard cron expressions:
schedo.defineJob(
'daily-backup',
'0 0 * * *', // Run at midnight every day
async (ctx) => {
// Job implementation
}
);
Cron expressions consist of five fields:
┌───────────── minute (0 - 59)
│ ┌───────────── hour (0 - 23)
│ │ ┌───────────── day of month (1 - 31)
│ │ │ ┌───────────── month (1 - 12)
│ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday)
│ │ │ │ │
* * * * *
Common Patterns
// Every minute
'* * * * *'
// Every 15 minutes
'*/15 * * * *'
// Every hour
'0 * * * *'
// Every day at midnight
'0 0 * * *'
// Every Monday at 9:00 AM
'0 9 * * 1'
// Every month on the 1st at midnight
'0 0 1 * *'
Schedule Validation
Schedo.dev validates both cron expressions and intervals:
// Invalid cron expression
schedo.defineJob(
'invalid-job',
'0 24 * * *', // 24 is invalid hour
async (ctx) => {
// Never runs - throws error during definition
}
);
Best Practices
-
Consider Business Hours
// Run during business hours (9 AM - 5 PM on weekdays)
'0 9-17 * * 1-5'
-
Stagger High-Load Jobs
// Instead of all jobs at midnight
'0 0 * * *' // Job A
'5 0 * * *' // Job B
'10 0 * * *' // Job C
Next Steps
