Cron

Some features of Reeve make use of Cron expressions for scheduling periodically occuring events.

A Cron expression consists of 5 fields, each for a different interval of time:

*     *     *     *     *

^     ^     ^     ^     ^
|     |     |     |     |
|     |     |     |     +----- day of week (0-6) (Sunday=0)
|     |     |     +------- month (1-12)
|     |     +--------- day of month (1-31)
|     +----------- hour (0-23)
+------------- min (0-59)

Examples

• * * * * * run on every minute
• 10 * * * * run at 0:10, 1:10 etc
• 10 15 * * * run at 15:10 every day
• * * 1 * * run on every minute on 1st day of month
• 0 0 1 1 * Happy new year schedule
• 0 0 * * 1 Run at midnight on every Monday

Lists

• * 10,15,19 * * * run at 10:00, 15:00 and 19:00
• 1-15 * * * * run at 1, 2, 3...15 minute of each hour
• 0 0-5,10 * * * run on every hour from 0-5 and in 10 oclock

Steps

• */2 * * * * run every two minutes
• 10 */3 * * * run every 3 hours on 10th min
• 0 12 */2 * * run at noon on every two days
• 1-59/2 * * * * run every two minutes, but on odd minutes