Run Azure Function every 3 days





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I want to create a cron expression to run Azure Function every 3 days at 12:00 PM



I created this: 0 0 */72 * * *
From my understanding, it should make the function run every 72 hours. When I run my function locally I see:
enter image description here



Looks like function will be run everyday. What's wrong? How to specify also the time at which function will start (12:00 PM)?










share|improve this question





























    1















    I want to create a cron expression to run Azure Function every 3 days at 12:00 PM



    I created this: 0 0 */72 * * *
    From my understanding, it should make the function run every 72 hours. When I run my function locally I see:
    enter image description here



    Looks like function will be run everyday. What's wrong? How to specify also the time at which function will start (12:00 PM)?










    share|improve this question

























      1












      1








      1








      I want to create a cron expression to run Azure Function every 3 days at 12:00 PM



      I created this: 0 0 */72 * * *
      From my understanding, it should make the function run every 72 hours. When I run my function locally I see:
      enter image description here



      Looks like function will be run everyday. What's wrong? How to specify also the time at which function will start (12:00 PM)?










      share|improve this question














      I want to create a cron expression to run Azure Function every 3 days at 12:00 PM



      I created this: 0 0 */72 * * *
      From my understanding, it should make the function run every 72 hours. When I run my function locally I see:
      enter image description here



      Looks like function will be run everyday. What's wrong? How to specify also the time at which function will start (12:00 PM)?







      azure cron azure-functions






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 22 '18 at 12:45









      LorenoLoreno

      307110




      307110
























          2 Answers
          2






          active

          oldest

          votes


















          2














          Update: as per @markxa mentioned, it will run at 12:00pm every 3rd day of the month.
          Please use this: 0 0 12 1/3 * *.



          Test result as below:
          enter image description here






          share|improve this answer


























          • What's the diffence between */3 ad 1/3? They seem to give same result

            – Loreno
            Nov 22 '18 at 13:42






          • 1





            No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

            – Ivan Yang
            Nov 22 '18 at 13:46



















          2














          Unfortunately the */72 doesn't mean "every 72 hours", it essentially means "when the hour modulo 72 is zero" which is only true when the hour itself is zero. The nearest you can get with a standard expression is 0 0 12 */3 * * which will run at 12:00pm every 3rd day of the month. Unfortunately this will give you a gap that's not 3 days at the end of any month that doesn't have 30 days; if that's not acceptable then you'll have to run it every day with 0 0 12 * * * and keep the last run time in persistent storage somewhere in your function code so you can only actually do the processing every 3 days.






          share|improve this answer



















          • 1





            Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

            – Loreno
            Nov 22 '18 at 13:43














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          2 Answers
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          active

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          2 Answers
          2






          active

          oldest

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          active

          oldest

          votes






          active

          oldest

          votes









          2














          Update: as per @markxa mentioned, it will run at 12:00pm every 3rd day of the month.
          Please use this: 0 0 12 1/3 * *.



          Test result as below:
          enter image description here






          share|improve this answer


























          • What's the diffence between */3 ad 1/3? They seem to give same result

            – Loreno
            Nov 22 '18 at 13:42






          • 1





            No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

            – Ivan Yang
            Nov 22 '18 at 13:46
















          2














          Update: as per @markxa mentioned, it will run at 12:00pm every 3rd day of the month.
          Please use this: 0 0 12 1/3 * *.



          Test result as below:
          enter image description here






          share|improve this answer


























          • What's the diffence between */3 ad 1/3? They seem to give same result

            – Loreno
            Nov 22 '18 at 13:42






          • 1





            No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

            – Ivan Yang
            Nov 22 '18 at 13:46














          2












          2








          2







          Update: as per @markxa mentioned, it will run at 12:00pm every 3rd day of the month.
          Please use this: 0 0 12 1/3 * *.



          Test result as below:
          enter image description here






          share|improve this answer















          Update: as per @markxa mentioned, it will run at 12:00pm every 3rd day of the month.
          Please use this: 0 0 12 1/3 * *.



          Test result as below:
          enter image description here







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 22 '18 at 13:44

























          answered Nov 22 '18 at 13:19









          Ivan YangIvan Yang

          4,677128




          4,677128













          • What's the diffence between */3 ad 1/3? They seem to give same result

            – Loreno
            Nov 22 '18 at 13:42






          • 1





            No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

            – Ivan Yang
            Nov 22 '18 at 13:46



















          • What's the diffence between */3 ad 1/3? They seem to give same result

            – Loreno
            Nov 22 '18 at 13:42






          • 1





            No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

            – Ivan Yang
            Nov 22 '18 at 13:46

















          What's the diffence between */3 ad 1/3? They seem to give same result

          – Loreno
          Nov 22 '18 at 13:42





          What's the diffence between */3 ad 1/3? They seem to give same result

          – Loreno
          Nov 22 '18 at 13:42




          1




          1





          No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

          – Ivan Yang
          Nov 22 '18 at 13:46





          No more difference, some tools like CronMaker will generate some little difference, but the result is the same.

          – Ivan Yang
          Nov 22 '18 at 13:46













          2














          Unfortunately the */72 doesn't mean "every 72 hours", it essentially means "when the hour modulo 72 is zero" which is only true when the hour itself is zero. The nearest you can get with a standard expression is 0 0 12 */3 * * which will run at 12:00pm every 3rd day of the month. Unfortunately this will give you a gap that's not 3 days at the end of any month that doesn't have 30 days; if that's not acceptable then you'll have to run it every day with 0 0 12 * * * and keep the last run time in persistent storage somewhere in your function code so you can only actually do the processing every 3 days.






          share|improve this answer



















          • 1





            Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

            – Loreno
            Nov 22 '18 at 13:43


















          2














          Unfortunately the */72 doesn't mean "every 72 hours", it essentially means "when the hour modulo 72 is zero" which is only true when the hour itself is zero. The nearest you can get with a standard expression is 0 0 12 */3 * * which will run at 12:00pm every 3rd day of the month. Unfortunately this will give you a gap that's not 3 days at the end of any month that doesn't have 30 days; if that's not acceptable then you'll have to run it every day with 0 0 12 * * * and keep the last run time in persistent storage somewhere in your function code so you can only actually do the processing every 3 days.






          share|improve this answer



















          • 1





            Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

            – Loreno
            Nov 22 '18 at 13:43
















          2












          2








          2







          Unfortunately the */72 doesn't mean "every 72 hours", it essentially means "when the hour modulo 72 is zero" which is only true when the hour itself is zero. The nearest you can get with a standard expression is 0 0 12 */3 * * which will run at 12:00pm every 3rd day of the month. Unfortunately this will give you a gap that's not 3 days at the end of any month that doesn't have 30 days; if that's not acceptable then you'll have to run it every day with 0 0 12 * * * and keep the last run time in persistent storage somewhere in your function code so you can only actually do the processing every 3 days.






          share|improve this answer













          Unfortunately the */72 doesn't mean "every 72 hours", it essentially means "when the hour modulo 72 is zero" which is only true when the hour itself is zero. The nearest you can get with a standard expression is 0 0 12 */3 * * which will run at 12:00pm every 3rd day of the month. Unfortunately this will give you a gap that's not 3 days at the end of any month that doesn't have 30 days; if that's not acceptable then you'll have to run it every day with 0 0 12 * * * and keep the last run time in persistent storage somewhere in your function code so you can only actually do the processing every 3 days.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 22 '18 at 13:19









          MarkXAMarkXA

          3,1311215




          3,1311215








          • 1





            Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

            – Loreno
            Nov 22 '18 at 13:43
















          • 1





            Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

            – Loreno
            Nov 22 '18 at 13:43










          1




          1





          Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

          – Loreno
          Nov 22 '18 at 13:43







          Interesting. In such case probbaly it'll b better to provide interval using Timespan. That requires switching to AppServicePlan however.

          – Loreno
          Nov 22 '18 at 13:43




















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