![]() Non-interrupting timer boundary events are often used to model notifications for example, contacting support if the processing takes longer than an hour. If the timer is triggered and defined as time cycle with repetitions greater than zero, it schedules the timer again until the defined number of repetitions is reached. When the activity is entered, it schedules a corresponding timer. Interrupting timer boundary events are often used to model timeouts for example, canceling the processing after five minutes and doing something else.Ī non-interrupting timer boundary event must have either a time duration or time cycle definition. When the corresponding timer is triggered, the activity is terminated. Timer boundary events Īn interrupting timer boundary event must have a time duration definition. When the timer is triggered, the catch event is completed and the process instance continues. The process instance stops at this point and waits until the timer is triggered. When an intermediate timer catch event is entered, a corresponding timer is scheduled. Intermediate timer catch events Īn intermediate timer catch event must have a time duration definition that defines when it is triggered. When a timer is triggered, a new process instance is created and the corresponding timer start event is activated. Scheduled timers of the previous version of the process (based on the BPMN process id) are canceled. When a process is deployed, it schedules a timer for each timer start event. Each of the timer events must have either a time date or time cycle definition. If you want it to be understandable, I think it would be better for the service to implement the timer itself.Timer events are events triggered by a defined timer.Ī process can have one or more timer start events (besides other types of start events). (You could still use systemd timers to message such a service, but I don't think it would look very clean. Or write a service of your own which spawns child processes and watches their status :-). If you needed to add more complex controls than provided by cron, or even more complex controls than are possible with transient service units, you might need to find another task scheduler that has the features you need. I think older versions of systemd did not allow setting as many of the properties on the transient unit). (Exactly which properties you can set with systemd-run varies a bit. If you like, you should be able to use options like -property RuntimeMaxSec=900 with systemd-run. And process P will not be killed when service S stops. systemd-run will not wait for P to finish (unless you use the -wait option). In other words, a systemd service S can use systemd-run to start a process P. By default, it automatically generates a unique name for the unit. systemd-run creates a transient service or scope unit. If you want to start a process asynchronously (and independently of any other instance), you can use systemd-run. ![]() So how can I make my systemd timer behave like the old cron script? My only remaining idea/workaround is to make two timers, set at 20 minute intervals, but that sounds like a really dumb idea. The cmd is not started or dies immediately. Tried things like ExecStart=/bin/sh -c "/run/my/cmd -options &" and with nohup and putting the whole command in a separate shell script to no avail. I've also attempted to make the service to run in the background, unmonitored by systemd, but I have not had much success with this. Is there any way to force the timer to do exactly as I want? But the associated service it starts runs slightly longer than 10 minutes, and this causes the timer to gradually drift by about 10 seconds per run. With cron this was not an issue, I simply had two instances running for a while, but systemd does not work the same.Īnd from what I understand, this is supposed to run at exactly 08:00:00, 08:10:00, 08:20:00, and so on and so forth. The problem is that the service it starts runs a while longer than 10 minutes. I had an old cron.d script (which executed faithfully once every 10 minutes) that I'm trying to modernize. ![]() I have a rather annoying issue with systemd timers and drifting start time.
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