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POShell Script Random Cron job
 

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  1. POShell Script Random Cron job
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    <p>I setup a cronjob to call myscript.sh every 5 min which then calls a php file between 30 sec and 3 in time and I don't get it why the average Interval is 05:09. </p> <p>I want to call cron2_.php every 4-8 min but no chance to achieve that.</p> <p>Tank you.</p> <p>Cron Job: <code>*/5 * * * * myscript.sh</code></p> <p>Shell script: </p> <pre><code>#!/bin/sh # Grab a random value between 60-180 or ( between 30sec and 3 minutes ) value=$RANDOM while [ $value -gt 180 ] || [ $value -lt 30 ] ; do value=$RANDOM done # Sleep for that time. sleep $value # Exectue Cron. echo "Exectued on:$(date)" &gt;&gt; public_html/log_file.txt exec php -f public_html/cron2_.php </code></pre> <p>Here is the exectuion time for 2 hours: Average Interval -> 05:09</p> <pre><code> Execution Time Interval Min:Sec 13:02:52 00:00 13:07:06 04:14 13:11:35 04:29 13:17:34 05:59 13:21:55 04:21 13:26:54 04:59 13:32:00 05:06 13:35:50 03:50 13:42:44 06:54 13:47:03 04:19 13:51:26 04:23 13:56:48 05:22 14:01:53 05:05 14:07:42 05:49 14:12:15 04:33 14:16:22 04:07 14:23:01 06:39 14:27:17 04:16 14:32:21 05:04 14:35:57 03:36 14:42:14 06:17 14:45:44 03:30 14:52:52 07:08 14:56:50 03:58 15:02:57 06:07 15:06:43 03:46 15:12:26 05:43 15:16:29 04:03 15:22:00 05:31 15:25:35 03:35 15:31:51 06:16 15:37:51 06:00 15:42:56 05:05 15:47:32 04:36 15:50:36 03:04 15:55:45 05:09 16:02:15 06:30 16:06:10 03:55 16:11:11 05:01 16:15:56 04:45 16:21:58 06:02 16:25:56 03:58 16:31:09 05:13 16:37:06 05:57 16:42:30 05:24 16:45:36 03:06 </code></pre>
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    1. USJeton R.
    1. USJeton R.
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      1. VTUpMod
    1. COHow did you get 79 for the "seconds" position of your average time?
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      1. POShell Script Random Cron job
      1. USKevin Chen
    2. COMeasure how many seconds it takes for `$RANDOM` to produce a number in your range? I would not be surprised if it takes dozens of seconds.
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      1. POShell Script Random Cron job
      1. UStripleee
    3. COKevinChen should be 5:09 fixed it. @tripleee I tried that and it takes from 2-3 sec max to get a number in that range. Can it be the php script execution taking alot of time ?
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      1. POShell Script Random Cron job
      1. USJeton R.
 

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