Schedule Jenkins Build

Question

I would like to schedule Jenkins build 9:30 am every morning. How do I set that?

I tried 30 9 * * * but it give me message in yellow flag Spread load evenly by using ‘H 09 * * *’ rather than ‘30 09 * * *

Thanks

Answer 1

"30 9 * * *" is correct if you want the job to run at exactly 9:30am every day. You can ignore the warning message in this case.

"H 9 * * *" will run it sometime between 9:00am and 9:59am every day - this syntax is useful if you want to spread out several jobs over time to avoid overload of resources. E.g. if you have 5 jobs you want run sometime between 9 and 10am, use this syntax.

Answer 2

Use below format

H(28-30) 9 * * *

Above format will start your Jenkins job around 9:28 AM to 9:30 AM.

The H symbol can be used with a range, To allow periodically scheduled tasks to produce even load on the system, the symbol H (for “hash”) should be used wherever possible.

so that was the reason your are getting warning, but not an error..!

Answer 3

The H option is more flexible compare to a fix cron time.

If several jobs are running at the same time on your Jenkins server, you can have a bottleneck regarding your server resources.

Using the H option, Jenkins will improve your jobs schedule and optimise the resources.

But if you want your job to be launched exactly at 9:30am every day, please use 30 9 * * *.