Can you please guide me in writing a cron expression for every 30 minutes from 9am to 9pm and once at 3am midnight. Is it possible in one expression? I can do easily for every 30 mins 9am to 9pm as "*/30 9-21 * * *" but how to add 3am to this. Thanks.
Unluckily it is not possible to create it in a single cron. You will have to create 2 separate crons one which does the 30 minutes 9-21 like you have it and one to run it once at 3am.
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Could you please provide the help on running the Airflow job to be scheduled at running every 15th minute of the hour. Let say if the job runs at 12:15, next would be 1:15 AM, 2:15 AM so on.
I tried with schedule_interval='15 * * * *' but no luck
15 * * * * is the correct cron expression to schedule every 15th minute of the hour.
If my cron job runs first at suppose 9:15. Then how do I make it run after every 30 minutes from then at 9:45 then 10:15 and so on?
How about:
15,45 9-23 * * *
This should give you “At minute 15 and 45 past every hour from 9 through 23.” (according to: https://crontab.guru/#15,45_9-23_*_*_*)
I need my crontab to execute every 45 minute of hour between 10 am to 10 pm.
currently I trying this
*/45 10-21 * * *
is this right or not?
This would start the first job at 10:45am last one at 9:45pm and jobs started at 45th min of every hour in between.
You can refer here how cron works https://man7.org/linux/man-pages/man5/crontab.5.html
We need a Cron job that runs every 5 hours and that takes a little longer than 4 hours to complete,
If it's scheduled in a Cron job as */5 for the hours part will it run at 1pm the second day?
Ie. Will the first day be 0,5,10,15,20 and then 1,6,11,21, (and so forth...)?
No, it will not.
Assuming the minute part is fixed (which makes the full cron expression into 0 */5 * * *), the cron job will always be triggered at 0th, 5th, 10th, 15th, and 20th hours every day.
In addition to that, the next cron job will be triggered regardless of whether the previous cron job has already been completed or not. For example, if the cron job at 5th hour takes 7 hours to complete, the cron job at 10th hour will still be triggered on time.
I want a cron job to run between 7 AM and 10 PM, every day, at 5 minute intervals. Normally this would be okay if it was 5 minute intervals, because you could just use "/5", but is there a way to specify it as 5 minute intervals but skip the times between 10PM and 7AM?
The minutes are specified separately from the hours in crontab. Specify minutes using the periodic notation, and the hours as a range.
*/5 7-21 * * * /path/to/script
Below would help for Quartz scheduler
0 00/5 7-21 * * ?